Choose a lean-to when roof height is tight, the footprint is wide and shallow, or you want an uncluttered contemporary line. The roof pitch and glazing specification are the two decisions that matter most.
The lean-to is the most understated shape in glazed extensions—and often the cleverest.
A single-slope roof leaning against the house does away with ridges and hips entirely for a low, clean, contemporary line. It is the shape you reach for when working under low eaves, when a run of wall is crying out for light, or when you simply want the architecture to feel calm.
01
The shape explained
What a lean-to actually is
A lean-to—sometimes called Mediterranean or garden-room style—has a mono-pitch roof: one plane sloping gently away from the house to the outer wall. No ridge, no valleys and no ornate roofline. That simplicity is the whole appeal. It slots neatly beneath features that a taller roof could collide with and reads as deliberate rather than compromised.
Mono-pitch
One plane. One direction. One quiet line.
The house supports the high edge; the roof falls to the garden elevation, keeping the profile low.
Gentle fall
02
Where it earns its place
When a lean-to is the right choice
Low eaves or a bungalow
A shallow mono-pitch fits where a conventional roof would meet first-floor windows or simply run out of height.
A minimal modern look
The uncluttered roofline suits contemporary and thoughtfully modernised homes.
A wide, shallow footprint
Lean-tos run naturally along the rear of a house—ideal for a broad kitchen-diner or garden room.
Economy without compromise
A simpler roof can be more economical while still looking crisp, considered and architectural.
03
Same roof, different room
Lean-to orangery vs lean-to glass extension
The lean-to is a roof shape, not a single product. Apply it to an orangery or to a largely glazed extension and the result feels very different.
More substantial
Lean-to orangery
Solid pillars and a partially solid roof, often with a slim rooflight or run of glazing along the slope.
Useful wall space for cabinetry
Strong thermal performance
Feels integrated with the house
Suited to kitchens and snug rooms
Best when warmth, furniture and working wall space matter.
More transparent
Lean-to glass extension
Slim-framed or frameless walls and, often, a largely glazed sloping roof for the lightest possible feel.
Maximum daylight and view
Minimal visual structure
Strong garden connection
Suited to light-filled sitting rooms
Best when the view and a sense of openness come first.
The simplest decision test: choose the orangery version for warmth and wall space; choose the glass version for maximum light and view. See examples of bespoke orangeries and frameless glass extensions.
04
Where the design lives or dies
Getting the mono-pitch roof right
The roof needs sufficient fall to drain properly, but too much pitch loses the low, clean character—and may bring the design back into conflict with the eaves. The best answer balances height, performance and daylight.
Fully glazed
Maximum overhead light, paired with high-performance solar-control glass.
Solid & insulated
A calmer ceiling and stronger insulation for rooms where comfort leads.
Mixed roof
Solid zones and a slim rooflight: often the most balanced solution.
Design for the sun
A south-facing glass slope deserves special attention.
A broad inclined surface can collect significant solar heat. Specify the glass for the orientation from the outset rather than treating comfort as an afterthought. Our guide to keeping a glass roof cool explains the options.
05
Low roof, wide opening
Glazing and doors complete the horizontal line
Because a lean-to is often low and wide, the rear wall naturally accommodates sliding or bifold doors across much of its width. Slim aluminium sightlines and a flush threshold amplify the garden-level feel.
06
Measure early, design once
What to consider before you build
Height beneath the existing eaves
The number that usually determines whether the roof can fit. Establish it before the design develops.
Which way the extension faces
Orientation changes the balance between daylight, solar control and insulation.
How the roof drains
A mono-pitch sends its water to one edge, so guttering and drainage need deliberate planning.
Planning constraints
Many rear extensions can use permitted development, but height limits near boundaries and property-specific restrictions still matter. Check the orangery planning permission guide.
South or westPrioritise solar-control glass, shading and ventilation.
NorthMore glazing may help gather useful natural light.
Near a boundaryReview height limits before fixing the roof angle.
The bottom line
Simplicity is the point—not a limitation.
A lean-to is the right shape when you want a low, clean roofline that fits beneath tight eaves and looks quietly modern. Choose the room type according to how you will live in it, then give the roof pitch and glazing specification the attention they deserve.
Choose orangeryFor warmth, wall space and a room that feels part of the house.
Choose glass extensionFor maximum light, view and an open connection to the garden.
For a sense of what your project may involve, the glass extension cost guide explains the factors that shape a quote.
Frequently asked questions
Lean-to extensions, answered
A lean-to orangery has a single-slope mono-pitch roof leaning against the house, combined with the solid pillars and partially solid roof of an orangery. It gives a low, clean line with the warmth and wall space of a substantial extension—ideal beneath low eaves or on bungalows.
The simpler mono-pitch roof structure is generally more economical than an elaborate pitched or lantern roof, although total cost still depends on the size, glazing specification and finish.
Yes. Where low bungalow eaves will not accommodate a taller pitched roof, a shallow mono-pitch lean-to can fit neatly beneath. It is one of the most common reasons to choose the shape.
A large sloping glass roof can gather significant solar heat, especially when facing south or west. Specify high-performance solar-control glazing during design rather than trying to solve comfort later.
Many single-storey rear lean-tos can fall under permitted development, but limits and property-specific restrictions apply. Height limits close to a boundary are particularly relevant, so check the specific situation before finalising the design.
Continue exploring
Turn the right roofline into the right room
Solid & substantial
Bespoke orangeries
Explore rooms with architectural pillars, useful wall space and carefully controlled light.
Room Outside designs lean-to orangeries and glass extensions for low eaves, wide spans, bungalows and modern homes. Talk through the right shape, glass and roof specification with the design team.
Three proven layoutsRoof lantern & glazingPractical details & cost drivers
Quick answer
An orangery is one of the most practical ways to extend a kitchen.
It brings the light and garden connection of a conservatory together with the solid walls, insulation and service space of a conventional extension. Position the lantern over the island or dining table, keep cabinetry on the solid sections, and choose the rear doors around how you use the garden.
AEO summary
The best orangery kitchen extensions combine a galley-plus-island, broken-plan or L-shaped layout with a well-proportioned roof lantern, high-performance glazing, wide garden doors, early service planning and a generous structural opening into the existing house.
The kitchen has quietly become the room people extend above all others—and an orangery is arguably the best way to do it.
You get daylight over the island and dining table, a strong connection to the garden, and enough solid structure for units, appliances and services. The room can feel open and architectural without behaving like a seasonal add-on.
This guide walks through the decisions that make an orangery kitchen work: layout, roof, glazing, finish, practical details and the choices that move the cost.
Start with how you want to live, not a standard footprint.
A free home design visit can test your preferred layout against the property, orientation and likely planning route. Talk to the Room Outside design team.
01 / Why it works
More useful wall space than a conservatory, with far more daylight than a conventional extension.
A working kitchen needs both: solid places for cabinetry and services, and carefully directed natural light.
Solid perimeter sections support a practical kitchen while the lantern brings light into the centre of the plan.
A classic conservatory is mostly glass. That is beautiful for a sitting room but awkward for a kitchen: there is nowhere to run wall units, tall cabinets or a long worktop, and uncontrolled temperature swings can make cooking uncomfortable.
An orangery solves this through brick or rendered pillars, a solid insulated perimeter roof and a central glazed lantern. You get usable wall space and a room that feels properly connected to the house, without losing the garden views.
Consider the all-glass alternative too
If maximum transparency matters more than cabinetry wall space, Room Outside’s glass kitchen and dining extension inspiration shows where a glass-led approach can be the stronger choice.
02 / Layout ideas
Three kitchen-orangery layouts that work again and again.
The right plan follows how you cook, gather, move through the room and connect to the garden.
Layout 01
The galley-plus-island
Units run along both solid side walls, with an island facing the garden. Put the lantern over the island so the busiest part of the room receives the most light.
Layout 02
The broken-plan kitchen-diner
Keep the kitchen nearest the house and place dining or seating toward the garden. Flooring, lighting or the island can define each zone without enclosing it.
Layout 03
The L-shaped wrap
Wrap around an existing rear projection, tuck the kitchen into the return and let the main span open to the garden. It often suits period homes particularly well.
A good plan does not simply fit the kitchen into the extension. It makes the kitchen, dining area, old house and garden read as one sequence.
03 / The roof lantern
The lantern is the biggest driver of how the room feels.
Its size, position and glass specification shape the light, ceiling rhythm and summer comfort of the whole space.
Proportion it to the room. One generous, well-proportioned lantern usually reads better than several small ones. Two matched lanterns can balance an especially wide span.
Centre it over the action. Align it with the island or dining table rather than placing it arbitrarily in the middle of the floor plan.
Control glare and heat. A kitchen produces its own heat, so solar-control, high-performance roof glass matters even more than it does in a sitting room.
The glass specification is part of the kitchen design.
Choose the rear opening around sightlines and how often you want the whole wall open.
Both sliding and folding doors can work beautifully. The difference is in the everyday view and the summer opening.
Wide garden doors turn the orangery kitchen into a natural route between the house, terrace and garden.
Slimmer everyday view
Large sliding doors
Fewer vertical frames and larger panes create a calmer picture-window effect. They are ideal when uninterrupted garden views matter every day.
Maximum summer opening
Bifold doors
The panels fold back so most of the wall can open at once, creating a wide connection to the terrace for entertaining.
Comfort comes before door type
Whichever system you choose, high-performance, solar-control glazing makes the difference between a room you enjoy in August and one you avoid.
05 / Practical design
The details people forget are the ones that make the kitchen work every day.
Plan these before the roof, floor and cabinetry drawings are fixed.
Ventilation and extraction. A cooker needs proper extraction. Plan the duct route early, especially when the island sits beneath a lantern.
Underfloor heating. It keeps the solid floor warm and frees the walls from radiators, leaving more room for cabinetry.
Service routes. Water, waste, gas and electrics all need a coordinated path into the extension. A well-planned floor build makes this far simpler.
Sightlines from the house. The view through the former external wall matters as much as the view out. A generous structural opening can justify the extra engineering.
06 / What shapes the budget
Six choices tend to move the cost of an orangery kitchen extension.
Every kitchen orangery is bespoke, so the most useful starting point is understanding which parts of the brief carry the greatest cost consequences.
Size and structural opening
A larger footprint adds material and groundwork; a wider opening into the house needs more substantial structural support.
Lantern size and number
One well-proportioned lantern is often the most efficient route. Multiple lanterns add framing, glass and roof detailing.
Glazing specification
Solar control, acoustic performance, larger panes and slimmer frame systems all influence the final price.
Frame material and finish
Timber, aluminium and hybrid systems have different manufacturing, finish and maintenance profiles.
The kitchen itself
Cabinetry, worktops, appliances and the island are a substantial project in their own right and are often priced separately from the shell.
Groundworks and access
Sloping sites, restricted access, drainage diversions and complex foundations add time and construction cost.
Compare the shell before you specify the kitchen.
The 2026 orangery prices guide explains what a higher-specification room includes and why apparently similar quotations can differ.
07 / Planning note
Check the consent route before an extra metre becomes essential to the layout.
Many single-storey rear orangeries use permitted development, but kitchen plans often seek greater depth.
Plan early
Standard permitted development, prior approval or full planning?
A deeper kitchen orangery may move into the larger-home-extension prior-approval route or require a full application. Listed homes, designated land and restricted development rights need additional care.
Room Outside’s guide to orangery planning permission sets out when standard permitted development can apply and when another route is likely.
Frequently asked questions
Orangery kitchen questions, answered.
Is an orangery a good choice for a kitchen extension?+
Yes. The solid pillars and perimeter give you wall space for units, appliances and services, while the roof lantern brings daylight into the centre. It functions as a genuine year-round kitchen rather than a seasonal room.
What is the best layout for an orangery kitchen?+
A galley-plus-island works for many rectangular rooms, with units on the solid walls and the island beneath the lantern. Broken-plan kitchen-diners and L-shaped wraps suit larger spaces and homes with existing rear projections.
Do I need planning permission for an orangery kitchen extension?+
Often it can use permitted development, but the extra depth a kitchen needs may push the proposal into prior approval or full planning. Check the property and dimensions before fixing the design.
How do I stop an orangery kitchen overheating in summer?+
Specify high-performance, solar-control glazing in the lantern and doors, then plan ventilation and shading at the design stage. The glass specification matters far more than most homeowners expect.
Can I have bifold or sliding doors in an orangery kitchen?+
Yes. Sliding doors give slimmer sightlines and larger panes, while bifolds can open almost the whole wall. Choose around the everyday view, the terrace and how you entertain.
Continue your research
Useful next steps before you finalise the kitchen plan.
Bring your kitchen ideas, property and wish list together in one design conversation.
Room Outside can help you test layouts, lantern proportions, glazing, garden doors, planning and shell specification before you commit to the kitchen itself.
Every project is bespoke. Structural design, services, planning, building regulations, kitchen specification, access and ground conditions can all affect the final design and price.
Do You Need Planning Permission for an Orangery? UK Rules (2026)
Do You Need Planning Permission for an Orangery? UK Rules (2026)
Orangery planning guide · England 2026
Do you need planning permission for an orangery? Usually not.
Most rear orangeries can be built under permitted development—but the dimensions, the property and the location all matter. Here is the plain-English route through the rules.
Permitted development limitsPlanning vs building regulationsPrior approval & LDCs
Quick answer
The majority of orangeries in England can be built without a full planning application.
They usually qualify as permitted development when they sit at the rear of a house and stay within the limits for projection, height, position and total land coverage. Listed buildings, designated land, flats and homes with restricted development rights need extra care.
AEO summary
Most single-storey rear orangeries do not need full planning permission if they meet permitted development rules. Building regulations approval is usually still required, and a Lawful Development Certificate is strongly recommended as evidence that the work was lawful.
“Most” is reassuring, but it is not the same as “all”. The exceptions are exactly the ones that catch homeowners out.
A listed home, a conservation area, a design that creeps beyond one of the limits, or an estate where permitted development rights were removed years ago can change the route completely.
Getting it wrong can mean a retrospective application and, in the worst case, altering or removing the structure. It is worth understanding the rules before you fall in love with a design.
Planning permission and building regulations are two different things.
They are often discussed together, but they answer different questions and can lead to different approval routes.
Planning permission
What are you allowed to build?
Planning controls the orangery’s size, height, position and—in sensitive settings—its appearance and relationship to the original home.
Building regulations
How must it be built?
Building regulations cover foundations, structural safety, insulation, glazing performance, ventilation, electrics and other technical standards.
The key distinction
You can be completely within permitted development for planning and still need building control approval. For an orangery, that is the usual situation.
02 / Building control
Why orangeries usually need building regulations—even when some conservatories do not.
The difference comes down to how substantial the room is and how closely it connects to the rest of the house.
An orangery is designed to feel like part of the home, with more solidity than a traditional conservatory.
A conservatory can sometimes be exempt from building regulations when it meets all the exemption conditions—broadly, it is under 30m², has the required proportion of glazed roof and walls, remains thermally separated from the house and has independently controlled heating.
An orangery is deliberately more substantial. It typically combines a solid or partially solid roof with a glazed lantern, brick or rendered pillars and a more integrated connection to the home.
That extra solidity normally places it outside the conservatory exemption, so it is treated like a single-storey extension for building control. That is not a disadvantage: it is how you create a room that is comfortable in January as well as July.
See what a more substantial glazed room looks like.
Explore Room Outside’s bespoke orangery extensions for examples of roof lanterns, solid sections and integrated living spaces.
03 / Standard permitted development
When an orangery can usually be built without full planning permission.
A single-storey rear orangery on a typical house can normally use permitted development, provided every relevant condition is met.
Position
Behind the principal elevation
The orangery must not extend forward of the wall that forms the home’s principal elevation, usually the wall facing the road.
Standard projection
Attached or detached
As a rule of thumb: up to 3m beyond the original rear wall for an attached or semi-detached house, or 4m for a detached house.
Overall height
Single-storey height limits
The overall height is normally no more than 4m, with eaves no higher than 3m when the structure is within two metres of a boundary.
Land coverage
Count previous additions too
Extensions and outbuildings together must cover no more than half the land around the original house.
Materials
The finish should be similar in appearance to the existing house.
Design choices still matter under permitted development, especially where brickwork, roof form and external finishes connect old and new.
Permitted development only applies when every relevant condition is satisfied—not when a project is “roughly” within the limits.
04 / Important exceptions
When you almost certainly do need planning permission or another consent.
Any one of these can take an orangery outside the standard permitted development route.
Sensitive homes and settings do not rule out a beautiful orangery—they simply make the consent strategy part of the design.
Your home is listed. Listed Building Consent is required regardless of the orangery’s size, and the design must respond to the character of the building.
You are on designated land. Conservation areas, Areas of Outstanding Natural Beauty, National Parks, the Broads and World Heritage Sites have tighter restrictions.
Permitted development rights were removed. A planning condition or Article 4 direction can remove rights, particularly on newer estates.
The design exceeds a limit. A larger projection, excessive height, front-facing position or too much total land coverage can require full permission.
You live in a flat or maisonette. Householder permitted development rights for extensions do not apply in the same way to flats.
This does not mean you cannot build.
It means the planning route and supporting design work need to be agreed before construction. Many exceptional orangeries are built on precisely these kinds of homes.
05 / The middle route
A larger rear orangery may be possible through prior approval.
The larger home extension route can allow more depth than standard permitted development without using a full householder planning application.
Attached or semi-detached
Up to approximately 6m
A deeper single-storey rear extension may be considered through the prior-approval process, subject to all applicable conditions.
Detached
Up to approximately 8m
The route can allow a larger projection, which may transform the proportions of a kitchen-orangery or family space.
The local authority notifies adjoining neighbours and considers the matters covered by the prior-approval process. It is lighter than a full planning application, but it is still an application and must be completed before work starts.
06 / Prove it is lawful
Even under permitted development, apply for a Lawful Development Certificate.
An LDC gives you written confirmation from the council that the proposed work would be lawful under permitted development.
It is not the same as planning permission, and it is not always legally required. It is still one of the most useful pieces of paperwork you can have.
When you sell, a buyer’s solicitor is likely to ask for evidence that the orangery was authorised. A certificate removes uncertainty and records the position against the rules in force when the work was assessed.
Room Outside recommendation
Treat the Lawful Development Certificate as part of the project, not an optional afterthought. The modest application cost is usually worth the certainty it creates.
07 / A practical sequence
Plan the room and the approval route together.
The strongest designs grow from the way you want to live, then respond to the property constraints from the start.
Step 01
Define how you will use it
Breakfast nook, kitchen-diner or family room? The use helps set the size, connection to the house and roof proportions.
Step 02
Check the property constraints
Confirm listed status, designated land, Article 4 directions, previous extensions and the original footprint of the house.
Step 03
Confirm the consent route
Choose between permitted development with an LDC, prior approval or a full planning application.
Step 04
Design and approve the build
Develop the design within the rules, then coordinate building regulations alongside the technical specification.
One team can manage the sequence from first sketch to construction.
Room Outside handles design, planning drawings, building control and the build under one roof. When you are ready to consider specification and budget, read the 2026 orangery prices guide.
Frequently asked questions
Orangery planning questions, answered.
Do all orangeries need planning permission?+
No. Most single-storey rear orangeries on standard houses fall under permitted development and do not need a full application, provided they stay within the size, height, position and coverage limits. Listed homes, designated land and homes with restricted development rights are key exceptions.
Do orangeries need building regulations approval?+
Usually, yes. Because an orangery has a substantially solid roof and is designed to feel like part of the house, it is typically treated as a single-storey extension for building control—unlike a fully glazed conservatory that may qualify for an exemption.
How big can an orangery be without planning permission?+
As a general guide in England, a single-storey rear orangery can project around 3m from an attached or semi-detached house, or 4m from a detached house, within the other height and coverage limits. A larger projection may be possible through prior approval.
What is a Lawful Development Certificate, and do I need one?+
It is official written confirmation that the proposed orangery would be lawful under permitted development. It is not always mandatory, but it is strongly recommended because it gives future buyers and solicitors clear evidence of the approval position.
Can I build an orangery on a listed building?+
Potentially, yes—but you will need Listed Building Consent, and the design must respond sympathetically to the property. Early advice is essential because heritage constraints shape the design and supporting application from the outset.
Find out what your home can take before you commit to an orangery design.
A free design consultation gives you a practical steer on permitted development, planning, building regulations, proportions and the right next step for your property.
This guide summarises general permitted development guidance for England in 2026. It is not legal advice. Rules can change and vary by property and location, so always confirm the position with your local planning authority or a qualified design professional before work begins.
A complete 2026 guide to bespoke orangeries in Chichester, from local planning and conservation settings to materials, costs, design styles and the Room Outside process.
Updated 23 June 2026Established 1973Chichester specialists
Quick answer
An orangery in Chichester is a brick-and-glass extension — more solid than a conservatory, more light-filled than a standard build — typically used as a kitchen-diner, garden room or living space.
Costs start from around £35,000 and rise with size and specification. Many orangeries fall under permitted development, but homes in Chichester’s conservation areas, the South Downs National Park, or Chichester Harbour AONB usually need planning permission.
Room Outside has designed and built orangeries from its Chichester base since 1973, with a 10-year guarantee on every installation.
1973the year Room Outside began designing glass extensions from its Chichester base.
Local projects
Conservatories in Chichester
We’ve been designing and building conservatories from our Drayton showroom, just outside Chichester, since 1973. Recent local projects in our public customer archive include a conservatory room in Chichester (archive: 2024) and an orangery extension in Emsworth (archive: 2024) — both within 15 minutes of our workshop. Whether it’s a hardwood conservatory for a period property near the Cathedral quarter or a slim-framed glass extension for a harbour-village home in Bosham or Itchenor, every project is designed around the house it joins. Conservatories start from £25,000, orangeries from £35,000, and every build carries our 10-year guarantee. Call 01243 538999 or book a free design consultation — we’ll visit your home, or you’re welcome at the showroom.
A bespoke timber-framed conservatory project in the Chichester area.A light-filled glazed living space near Emsworth, west of Chichester.
Chichester homes often suit orangeries because masonry, lantern proportions and sympathetic detailing can sit comfortably with period, village and coastal architecture.
01 / Guide
What exactly is an orangery?
An orangery is a glazed extension built around a framework of solid brick or stone piers, topped with a flat perimeter roof and a central glass lantern. That structure is the whole point. Where a conservatory is mostly glass from a low dwarf wall upward, an orangery keeps real, load-bearing masonry at its corners — and that single difference changes everything about how the room feels and functions.
The solid piers give you somewhere to put things: kitchen units, a run of radiators, bookshelves, artwork, a media wall. The masonry retains heat in winter and keeps the room cooler in summer, while the central lantern floods the heart of the space with daylight. The result reads as permanent architecture — a genuine room of the house, not a seasonal add-on bolted to the back.
Historically, orangeries began in the 17th century as elegant glasshouses for protecting citrus trees through winter. Over time they evolved from functional buildings into refined architectural features, and today — with modern temperature-controlled glazing — they are one of the most desirable ways to extend a home, comfortable and usable in every month of the year.
In one line
A conservatory is a glass room added to a house; an orangery is a room of the house that happens to be full of light.
02 / Guide
Orangery vs conservatory vs glass box
The three options Chichester homeowners weigh up most often each suit a different brief.
Feature
Conservatory
Orangery
Frameless glass box
Structure
Mostly glass, dwarf wall
Brick piers, glass and lantern
Structural glass, minimal frame
Look
Light, traditional or modern
Solid, architectural, permanent
Contemporary, near-invisible
Insulation / year-round comfort
Good with modern glazing
Excellent, with masonry mass
Good with thermal glazing
Wall space for units/radiators
Limited
Generous
Minimal
Best suited to
Period and family homes on a budget
Period, heritage and high-value homes
Modern homes and bold contrasts
Typical Chichester use
Garden room, dining
Kitchen-diner, living room
Architectural link, view room
For Chichester specifically, the orangery often wins because it strikes the balance the city’s housing stock rewards: more solidity and warmth than a conservatory, more sympathy with period brick than a frameless glass box, and enough wall space to work as a real kitchen or living room rather than just a sunny add-on.
That said, every home is different. A contemporary house near the harbour might be perfect for frameless glass, while a tighter budget might point to a high-specification conservatory. We design around the property, not a product line.
03 / Guide
Why Chichester homes suit orangeries
Chichester’s housing is unusually varied for a city its size, and that variety is exactly what plays to an orangery’s strengths.
The historic core
Around the cathedral and the Pallants, homes are period, often listed, and almost always within a conservation area. Brick piers, classical proportions and a lantern roof can echo the existing architecture in a way no all-glass structure can.
The harbour villages
Bosham, Itchenor, Birdham and the Witterings face salt air, wind and bright low sun. Orangeries suit them when specified with marine-grade aluminium where appropriate, solar-control glass and respectful roof forms.
The Downland edge
To the north, flint and brick villages sit in protected countryside. An orangery with knapped-flint detailing or sympathetic brickwork can belong in this setting in a way a modern box rarely does.
Victorian terraces, brick village homes, 1930s semis and substantial detached houses make up much of the rest — all candidates for an orangery that adds light, space and value.
Across all of these, three local factors recur: heritage character that rewards masonry over glass; light and aspect, often toward a garden, the harbour or the Downs; and the mild-but-breezy South Coast climate, which makes an insulated orangery roof and temperature-controlled glazing genuinely worthwhile.
04 / Guide
What can you use a Chichester orangery for?
Because an orangery is a properly insulated, year-round room, homeowners use it as real living space rather than an occasional sunroom. The most popular uses we see across Chichester are:
Kitchen-diner. By far the most common. Removing all or part of the rear wall and extending into an orangery creates an open-plan kitchen and dining space, with the lantern throwing light over an island or dining table.
Living and entertaining room. A calm, garden-facing space for relaxing and hosting, often with bi-fold or French doors opening to the patio.
Home office. The solid walls and quiet separation make an orangery a serious workspace — a real consideration for the many Chichester residents who work from home or split time with London.
Garden room or standalone studio. Thanks to its solid structure, an orangery also works as a standalone garden building — a studio, gym or guest space.
05 / Guide
How much does an orangery cost in Chichester?
An orangery is bespoke, so there is no single sticker price — but we believe in honest, itemised pricing rather than a misleading “from” figure that doubles in reality. Every Room Outside quote includes design, building control, premium materials, professional installation and a 10-year warranty, fully itemised with no hidden extras.
New Generation Glass / self-cleaning glass vs standard
Roof lantern size & style
Medium-High
Larger or steel-framed lanterns add cost
Doors
Medium
Premium aluminium bi-fold or slim-frame systems vs standard French doors
Groundwork & site levels
Medium
Sloping or harbour-side plots need more foundation work
Internal fit-out
Medium
Kitchen, underfloor heating, lighting, plastering
Heritage detailing
Low-Medium
Matched brick, lead detail, conservation glazing bars
Is it worth it? As a genuine, year-round room rather than a seasonal add-on, an orangery adds both floor area and value. Industry data from RICS and Savills suggests a well-designed extension typically adds 5-10% to a property’s value — and in a desirable market like Chichester’s, buyers increasingly view a quality, all-season room as a major plus and a dated, cold conservatory as a liability.
Managing your budget. There are sensible ways to control cost without cutting quality: keeping the footprint efficient, choosing a standard rather than oversized lantern, phasing internal fit-out, and being realistic about groundwork early.
06 / Guide
Materials and glazing
The right specification decides how your orangery looks, performs and lasts.
The way an orangery looks, performs and lasts comes down to two choices: the frame material and the glass.
Frame materials. We build in hardwood timber, aluminium, uPVC and structural glass, and the right one depends on your home. Hardwood timber suits period and listed properties, with the option to stain or paint in any finish. Aluminium gives slim, strong, low-maintenance frames in a wide colour range, ideal for a contemporary look. uPVC offers durability and value, often matched to existing window frames.
Glazing — and why it matters most. Your orangery should be comfortable in July and December alike, which is why glazing is the specification that earns its keep. Our New Generation Glass — temperature-controlled glazing originating in America and available in the UK exclusively through Room Outside — reduces glare, blocks almost all UVA and UVB rays, and regulates temperature so the room stays warm in winter and cool in summer.
The central lantern roof is the orangery’s signature: it creates drama and a focal point while flooding the space with natural light, often as a spotlight over a kitchen island or dining table.
Chichester coastal specification
For harbour and coastal homes, we specify with the environment in mind: marine-grade aluminium finishes and glass suited to salt air and exposure where the location calls for it.
07 / Guide
Do you need planning permission?
Often no — but Chichester has more exceptions than almost anywhere we work, so this is the section worth reading closely. Planning is handled by Chichester District Council, with two other authorities involved depending on where your home sits.
Room Outside does not provide formal planning advice, but our local experience helps you ask the right questions early, and we support and document applications, including engagement with conservation officers.
When an orangery is usually permitted development. Many single-storey rear orangeries can be built without a planning application under permitted development rights, provided the design meets the limits: broadly, extending no more than 4m from the rear wall of a detached house, 3m for a semi or terrace, staying under height limits, and covering less than 50% of the garden. Building regulations still apply — chiefly Part L for thermal performance and Part K for safety glazing — and even where you qualify, a Lawful Development Certificate from the council is worth obtaining as proof.
When you will usually need full planning permission. Chichester’s designations frequently override permitted development. You will typically need permission if your home is:
In a conservation area — much of the historic city centre and several villages.
Listed — in which case listed building consent is also required, and the design must defer to the original property.
Within the South Downs National Park — covering the district’s northern parts, where the National Park Authority assesses landscape impact, materials and roof form.
Within or beside Chichester Harbour AONB / National Landscape — the coastal fringe, where the Conservancy’s considerations affect specification, sightlines and finishes.
Subject to an Article 4 direction removing permitted-development rights.
The practical path. Check your property’s designations on the Chichester District Council planning portal, the South Downs National Park Authority, and the Chichester Harbour Conservancy before you commit, and confirm specifics with the council or a planning consultant.
The encouraging news: heritage-sympathetic orangeries are regularly approved in exactly these sensitive settings, precisely because masonry and classical proportions sit comfortably where a glass box would not.
08 / Guide
Design styles for Chichester homes
Every Room Outside orangery is designed around your home’s existing brick, roofline and aspect — never pulled from a catalogue. In practice, four directions cover most Chichester projects:
The art is in the detail: matching the brick to the original house, getting the lantern proportions right, choosing glazing bars and finishes that feel of the building rather than added to it. That sympathetic detailing is what keeps an orangery sitting comfortably within Chichester’s protected streetscapes — and what gets sensitive projects through planning.
09 / Guide
The design-and-build process
A Room Outside orangery follows a clear, considered process designed to remove uncertainty:
Free design consultation. We visit your home, understand how you want to use the space, and discuss the local context: aspect, garden orientation, heritage character and planning setting.
Design & 3D visualisation. Our designers develop the concept and produce 3D renderings so you can see exactly how the orangery will look from multiple angles before committing.
Itemised, transparent quote. Within around five days you receive a complete specification and fully itemised price: design, building control, materials, installation and warranty included, with no hidden extras.
Planning & building control. We support the application where needed, handle building control compliance, and engage with conservation officers for sensitive sites.
Manufacture. Frames, glazing and the lantern are made to order to your specification.
Build & glaze. Groundwork, structure, roof, glazing and fit-out, managed by our team.
Handover & guarantee. Your finished orangery is backed by an insurance-backed 10-year guarantee.
How long does it take?
A typical project runs around 4-6 months from first consultation to completion, including design, planning and installation. Planning in conservation areas, the National Park or on listed buildings can extend the front end, so the rule of thumb is simple: to enjoy your orangery by summer, start the conversation over winter.
10 / Guide
Why choose Room Outside?
Chichester is not a territory we cover from a distance — it is where we are based, and have been since 1973. Over 53 years we have completed thousands of glass extensions across West Sussex and the South East, and our home county is where that experience runs deepest.
Local, on your doorstep. Our Chichester team brings practical knowledge of West Sussex homes, coastlines and planning settings — from harbour exposure to South Downs sympathies.
Genuinely bespoke. Every orangery is individually designed around your property and how you will live in it, in your choice of timber, aluminium, uPVC or frameless glass.
New Generation Glass. Our temperature-controlled glazing, available in the UK exclusively through Room Outside, is what makes an orangery comfortable in every season.
Transparent pricing. Honest, itemised quotes with everything included — no “starting from” figures that double on closer inspection.
Backed for the long term. A 10-year insurance-backed guarantee, and a 5/5 Google review rating over the last two years.
We have also designed orangeries for listed buildings and homes in areas of outstanding natural beauty across the district, blending sympathetically with the original architecture — the kind of work that rewards five decades of local experience.
11 / Guide
Caring for your orangery
A quality orangery asks little of you, but a little care keeps it pristine. Glass and frames benefit from periodic cleaning; harbour-side homes should rinse off salt residue after onshore storms; and self-cleaning glass reduces maintenance on hard-to-reach roof glazing.
Our Groom Outside service offers professional deep valet cleaning and maintenance for orangeries and glass extensions, keeping frames, seals and gutters in top condition for years to come. Should an older glass roof ever need it, our New Generation Glass upgrade can modernise thermal performance without a full rebuild.
Frequently asked questions
Straight answers for Chichester homeowners comparing orangery options.
Is an orangery warmer than a conservatory?
Yes. The solid brick piers and insulated perimeter roof of an orangery retain heat far better than an all-glass conservatory, and our temperature-controlled New Generation Glass keeps it comfortable in summer and winter alike.
How much does an orangery cost in Chichester?
Bespoke orangeries start from around £35,000 and rise with size, glazing, lantern and fit-out. Every quote is itemised and includes design, building control, materials, installation and a 10-year guarantee.
Do I need planning permission for an orangery in Chichester?
Often not — many rear orangeries are permitted development. But homes in conservation areas, the South Downs National Park, Chichester Harbour AONB, or listed buildings usually require planning permission. Always check your designations first.
Can I add an orangery to a listed building in Chichester?
Often yes, with listed building consent alongside planning permission and a design sympathetic to the original property. We have completed many orangeries on listed and period homes across the district.
Do orangeries add value to a Chichester home?
Generally yes. As a genuine year-round room it adds both floor area and light, and a well-designed extension typically adds 5-10% to property value according to RICS and Savills.
What is the difference between an orangery and a conservatory?
An orangery has solid brick piers and a central lantern, giving more insulation, wall space and a permanent feel; a conservatory is mostly glass, lighter and usually more affordable. An orangery generally costs more but delivers a more solid, year-round room.
How long does it take to build an orangery?
Typically around 4-6 months from consultation to completion, including design, planning and installation. Sensitive planning settings can add time at the front.
Which is best for my orangery: timber, aluminium or uPVC?
Timber suits period and listed homes, aluminium gives slim contemporary frames, and uPVC offers value and low maintenance. We will recommend the right one for your property at the design stage.
Will an orangery be too hot in summer or cold in winter?
Not with New Generation Glass, which regulates temperature, reduces glare and blocks UV, keeping the room comfortable across the seasons.
Who builds orangeries in Chichester?
Room Outside, a West Sussex specialist established in 1973 and based just outside Chichester, designs and installs bespoke orangeries across the city and the surrounding district.
Ready to talk about your orangery?
Chichester is our home patch, and we would love to help you design an orangery that suits your home, your lifestyle and its setting. Book a free, no-obligation design consultation, browse the Orangery Price Guide 2026, or explore the full orangery range.
Room Outside: bespoke orangeries, conservatories and glass extensions across West Sussex since 1973. Drayton House, Drayton, Chichester, West Sussex, PO20 2EW.
Conservatory vs Orangery vs Glass Box: Buyer’s Framework
Conservatory vs Orangery vs Glass Box: Buyer’s Framework
Conservatory vs Orangery vs Glass Box: A Buyer’s Framework
A practical side‑by‑side comparison of cost, planning, thermal performance and decision factors – helping homeowners across Hampshire, Surrey, Sussex, Kent and London choose the right glazed extension.
The short answer: Conservatories maximise light and are generally most affordable; orangeries offer better thermal stability and feel more like a permanent house extension; glass box extensions deliver a contemporary, frameless aesthetic with premium cost and engineering. The right choice depends on your budget, site conditions, planning context and how you intend to use the space.
Last updated: May 2026 – based on UK industry data from Which?, Homebuilding & Renovating, Everest, Ultraframe and Room Outside pricing guides.
£48k–£60kConservatory (20m²)
£60k–£115k+Orangery (20m²)
£50k–£180k+Glass box extension
2–20 weeksBuild time range
Quick comparison at a glance
Conservatory
Primary structurePredominantly glazed walls and roof
Thermal performanceDepends on glass spec; high‑end systems approach wall U‑values
Planning permissionAlmost always required
Building RegulationsAlways full approval
Build time10–20 weeks
Cost per m² (2026)£2,000–£4,500
1. Understanding the three options
Conservatory
A conservatory is defined under UK planning law as a structure with at least 50% of its side wall area glazed and at least 75% of its roof area covered by translucent material (glass or polycarbonate). Traditional styles include Victorian, Edwardian and lean‑to. Modern conservatories use low‑E glass, argon fill and warm‑edge spacers, making them comfortable for much of the year. Build time is typically 2–4 weeks and they are often the most budget‑friendly option.
Orangery
Historically built to protect citrus trees, an orangery sits between a conservatory and a traditional extension. It features a solid brick or masonry base, large windows above, and a flat solid roof with a central glass lantern. Less than 50% of the wall area is glazed, which means better thermal insulation and a more permanent feel. Build time: 6–12 weeks. Estate agents often perceive orangeries as adding more property value than a standard conservatory.
Glass Box Extension (Frameless/Structural Glass)
A glass box uses structural glass or slim‑frame aluminium systems (as narrow as 35–50mm) to create almost invisible boundaries between indoors and outdoors. True frameless systems rely on glass fins and structural silicone. These extensions require full Building Regulations approval, longer build times (10–20 weeks) and higher budgets, but deliver a striking contemporary aesthetic.
2. Cost breakdown (2026 UK data)
Cost figures are compiled from Hallmark Glazed Extensions, Room Outside, Everest, Ultraframe, MyJobQuote and independent surveys. Actual costs vary with site conditions, specification and location (London and South East carry a 20–30% premium).
Option
Typical cost range (20m², 2026)
Notes
Conservatory (uPVC, glass roof)
From £48,000
Basic specification, may have higher U‑value.
Conservatory (aluminium frames)
From £60,000
Slimmer sightlines, better thermal breaks.
Orangery (standard)
£60,000–£85,000
Brick base, standard roof lantern.
Orangery (premium)
£85,000–£115,000+
New Generation Glass, improved insulation.
Framed glass extension
£50,000–£100,000
Slim aluminium frames (35–50mm).
Structural glass box
£80,000–£180,000+
Glass fins, bespoke engineering.
Key cost drivers: foundations (clay soil or trees add £4k–£15k+), frame material (timber most expensive, uPVC most affordable), glazing specification (solar control adds 10–25%), and kitchen fit‑out (£15k–£45k extra).
3. Planning permission & Building Regulations
Permitted Development (PD): Conservatories and orangeries can often be built under PD if they do not exceed 4m height, 3m depth (semi/detached) or 4m (detached), and cover no more than 50% of the garden. Glass boxes are almost never exempt because they are not considered “conservatories” in the legal definition – they always require planning permission.
Building Regulations: A conservatory is exempt if all five conditions are met: under 30m², ground level, thermally separated, independent heating, and glazing safety. Orangeries and glass boxes generally require full approval, meeting current U‑value standards (walls ≤0.28 W/m²K, roof ≤0.16 W/m²K).
4. Thermal performance & year‑round comfort
Modern conservatories with solar‑control glass (g‑value ≤0.35) and thermally broken frames can be comfortable for much of the year, but they still have lower thermal mass than brick walls. Orangeries benefit from solid perimeter walls, which moderate temperature swings and often feel more stable. Glass box extensions rely entirely on glass specification – high‑performance units with low‑U and low‑g values can perform well, but occupants should expect quicker temperature changes than in an orangery.
5. Property value contribution
According to 2026 estate agent surveys (Homebuilding & Renovating, Which?): a quality conservatory typically adds 5–7% to a home’s value; an orangery can add 10–15% because it is perceived as a permanent extension. Glass box extensions, being less common, have less published data but can be a strong selling point for high‑end contemporary properties.
Which is cheaper: conservatory, orangery or glass box?
A conservatory is generally the most affordable option, with entry-level prices from around £48,000 for a 20m² build. Orangeries typically cost from £60,000 upward, and structural glass boxes often start above £80,000.
Do I need planning permission for an orangery?
Many orangeries fall under Permitted Development, provided they meet size and height limits. However, because orangeries have a solid roof and substantial brickwork, some local authorities treat them as extensions – always check with your planning department or specialist supplier.
Can I use a conservatory all year round?
Yes – modern conservatories with solar‑control glass, low‑E coatings, and thermally broken frames can be comfortable throughout the year. However, they have lower thermal mass than an orangery or brick extension, so temperature swings may be more noticeable.
Which adds most value to a home?
Industry surveys suggest an orangery typically adds 10–15% to property value, compared with 5–7% for a standard conservatory. Glass box extensions can add significant value for contemporary properties, but there is less published data.
What is the typical build time for each option?
Conservatories: 2–4 weeks. Orangeries: 6–12 weeks. Glass box extensions: 10–20 weeks, depending on complexity and structural engineering requirements.
Which option is most energy efficient?
Orangeries, with solid brick walls and a glass lantern, often provide the best thermal mass and insulation. However, a glass box extension specified with high-performance triple glazing and thermally broken frames can achieve excellent U-values, but it relies entirely on the glazing specification.
Call us anytime – David, our digital assistant, will take a few details so the right specialist can follow up personally. 01243 538999 or request a consultation online.
Hardwood Orangeries: The Craft Behind Timber-Framed Architecture
From mortise and tenon joints to hand-finished paint systems—understanding the techniques, materials, and craftsmanship that create an orangery built to last generations.
20 min read
Updated March 2026
50+ Years Timber Expertise
The Art of Timber Orangeries
A hardwood orangery isn’t just an extension—it’s an exercise in traditional craftsmanship applied to modern living. The techniques we use today trace back centuries, refined through generations of joinery expertise and adapted for contemporary performance requirements.
This guide reveals what goes into a quality timber orangery: the joinery techniques that ensure structural integrity, the timber grading that determines longevity, the paint systems that protect for decades, and why hardwood remains the architect’s choice for period properties across West Sussex and beyond.
Hardwood Orangery Construction at a Glance
Traditional joinery: Mortise and tenon, wedged through-tenons, scribed joints
Timber grading: J30/J40 stress-graded for structural elements
Moisture content: 12-15% (kiln-dried for interior joinery)
Paint system: 4-5 coats including primer, preservative, and microporous finish
Lantern roof: Engineered timber rafters, traditional ridge details
Expected lifespan: 50-80+ years with proper maintenance
Typical investment: £60,000-£150,000+ depending on size and specification
50-80+
Years Lifespan
4-5
Paint System Coats
12-15%
Moisture Content
8-12
Years/Maintenance
What Defines a Hardwood Orangery?
An orangery occupies a distinct architectural category—more substantial than a conservatory, with a stronger sense of being a ‘room’ rather than a glazed space. The defining characteristics include solid corner pillars or piers, a flat perimeter roof section (often concealing the internal ceiling), and a central lantern roof that floods the space with light.
While modern orangeries can be built in aluminium or uPVC, hardwood remains the material of choice for discerning homeowners—particularly those with period properties where authenticity matters. The reasons go beyond aesthetics: timber offers superior thermal performance, allows for traditional detailing that planners appreciate, and can be crafted using joinery techniques refined over centuries.
The strength and longevity of a hardwood orangery depend fundamentally on how the timber components are joined together. Quality construction relies on traditional joinery techniques that have proven themselves over centuries—not shortcuts that compromise structural integrity.
Mortise & Tenon
The fundamental joint for frame construction. A projecting tenon fits into a mortise cavity, creating a strong mechanical connection.
Wedged Through-Tenon
For maximum strength, the tenon passes completely through and is secured with hardwood wedges. Visible craftsmanship.
Finger Joints
Engineered sections use precision finger joints bonded with weatherproof adhesive. Creates stable, dimensionally accurate timber.
Why Traditional Joinery Matters
Modern fasteners—screws, brackets, metal plates—have their place, but they should supplement traditional joinery, not replace it. Here’s why:
Mechanical strength: A properly cut mortise and tenon joint transfers load across the full depth of the timber, not just at surface screw points
Movement accommodation: Timber naturally expands and contracts. Traditional joints allow controlled movement without loosening
Repairability: Joints can be dismantled, repaired, and reassembled. Screw-fixed assemblies strip and degrade
Longevity: Medieval timber frames still stand after 500+ years. Traditional joinery is proven technology
Spotting Quality Joinery
When evaluating an orangery quote, ask to see sample joints or visit a workshop. Quality indicators include:
Clean, precise mortise cavities without tear-out
Tenons that fit snugly without force or gaps
Wedges made from hardwood, not softwood offcuts
Scribed joints where mouldings meet (not simple mitres)
Minimal reliance on visible metal fixings
Timber Selection and Grading
Not all timber is suitable for orangery construction. The species must offer durability, stability, and workability. The grading must meet structural requirements. And the moisture content must be precisely controlled to prevent movement after installation.
Structural Grading Standards
Timber used for structural elements (posts, beams, rafters) must be stress-graded to British Standards. The grading assesses strength, stiffness, and density, accounting for natural defects like knots.
Grade
Application
Strength Class
Typical Use
C24/J40
Primary structural
Higher strength
Main posts, beams, ridge
C16/J30
Secondary structural
Standard strength
Rafters, studs, rails
Joinery Grade
Non-structural
Appearance focused
Mouldings, trim, glazing bars
Moisture Content: The Critical Factor
Timber moisture content determines how much the wood will move after installation. Install timber that’s too wet, and it will shrink as it dries—opening joints, cracking paint, and compromising weathertightness.
Air-dried timber: 18-25% (acceptable for external rough carpentry)
Kiln-dried for joinery: 12-15% (essential for precision orangery work)
Internal joinery: 8-12% (for door and window components)
Quality manufacturers use kiln-dried timber and store it in controlled conditions until machining. Ask your supplier about their moisture content specifications and verification process.
Species Selection for Orangeries
Sapele
Our most frequently specified species, sapele offers an excellent balance of durability, workability, and cost. Rich reddish-brown colour, tight interlocked grain, and good dimensional stability.
Durability Class 2-3 (25-40 years)
Excellent paint adhesion
FSC-certified sources available
Best value for premium quality
European Oak
The prestige choice for period properties. Distinctive grain, exceptional longevity, and authentic heritage character. Often specified for listed buildings and conservation areas.
Durability Class 2 (30-50 years)
Often left natural or oiled
Higher movement than sapele
Premium investment, exceptional appeal
Accoya
Modified softwood with hardwood performance. Acetylation process creates exceptional stability and durability with a 50-year manufacturer warranty. Ideal for painted finishes.
Durability Class 1 (50+ years)
Minimal movement (paint lasts 2x longer)
Cradle to Cradle Gold certified
Best for coastal/exposed locations
Engineered Sections
For maximum stability, we use engineered timber sections—multiple layers of kiln-dried timber bonded together with grain directions alternating to cancel out movement.
Exceptional dimensional stability
Ideal for large sections prone to twist
Finger-jointed for consistent quality
Essential for lantern roof rafters
Paint Systems: The Science of Protection
A timber orangery’s paint system isn’t just about colour—it’s a carefully engineered barrier protecting the wood from moisture, UV degradation, and biological attack. Understanding what goes into a quality finish helps you evaluate the difference between suppliers who invest in proper protection and those who cut corners.
Anatomy of a Quality Paint System (5 Coats)
Top Coat (x2)Microporous finish, UV protection
UndercoatBuild film thickness, adhesion
PrimerSeals timber, prevents tannin bleed
PreservativeFungicide/insecticide treatment
Kiln-Dried Timber12-15% moisture content
Why Microporous Finishes Matter
Traditional gloss paints formed an impermeable film on the timber surface. When moisture inevitably penetrated (through joints, end grain, or minor damage), it became trapped under the paint, causing blistering, peeling, and rot.
Modern microporous finishes allow water vapour to escape while still repelling liquid water. The paint flexes with the timber’s natural movement rather than cracking. When it eventually weathers, it fades gradually rather than peeling—making recoating a straightforward process without extensive stripping.
Factory Application vs Site Application
Factor
Factory Applied
Site Applied
Environment
Controlled temperature/humidity
Variable conditions
Application Quality
Consistent spray/dip application
Depends on applicator skill
End Grain Treatment
Full immersion possible
Often inadequate
Drying Time
Optimal conditions, no rushing
May be rushed for installation
Coat Adhesion
Excellent (sanded between coats)
Variable
Warranty
Typically 8-15 years
Often limited or none
We apply all finishes in our workshop under controlled conditions, with each coat properly cured before the next is applied. The extra time and cost is justified by dramatically longer intervals between maintenance.
Premium Paint Brands We Specify
Teknos: Finnish industrial coatings with exceptional durability. Factory-applied systems with up to 15-year warranties.
Rubio Monocoat: Single-coat oil system for natural finishes. Ideal for oak where the grain should remain visible.
Osmo: Hard-wax oils for interior surfaces. Natural finish with excellent durability.
The Timber Lantern Roof
The lantern roof is the architectural centrepiece of an orangery—the element that floods the interior with natural light while defining the character of the space. Building a timber lantern roof requires careful engineering to handle structural loads, thermal movement, and weathertightness. The design decisions you make here significantly impact both aesthetics and performance—our bespoke orangery design guide explores these choices in detail.
Structural Ring Beam
The lantern sits on a substantial timber ring beam or kerb, which distributes roof loads to the supporting structure below. Engineered timber sections prevent twisting under load.
Rafter Construction
Rafters radiate from the central ridge or apex, typically in engineered timber for stability. Mortise and tenon joints at both ends ensure long-term structural integrity.
Glazing Bars
Vertical mullions and horizontal transoms divide the glazed area. Traditional putty glazing or modern dry-glazed systems depending on design aesthetic.
Ridge and Apex Details
The ridge (rectangular lanterns) or apex (hipped/octagonal) requires precise joinery. Often finished with decorative cresting, finials, or ball finials.
Ventilation Integration
Opening vents can be incorporated into the lantern design—essential for managing heat build-up. Manual or automated options available.
Lead Flashing Details
Where the lantern meets the flat roof, traditional lead flashing creates weathertight junctions. Code 4 or Code 5 lead, dressed by hand for precision fit.
Lantern Roof Styles
Style
Characteristics
Best For
Rectangular Hip
Four-sided with hipped ends. Classic proportions.
Georgian and Edwardian properties
Rectangular Gable
Two-sided with gable ends. More contemporary feel.
Modern interpretations, longer spans
Octagonal
Eight-sided with central apex. Dramatic impact.
Feature orangeries, square footprints
Circular/Dome
Curved construction. Highly complex joinery.
Premium bespoke designs
Flat with Rooflights
No raised lantern. Simpler construction.
Where height is constrained
Thermal Performance Considerations
A lantern roof introduces significant glazed area. To maintain year-round comfort:
Solar control glazing: Essential for south/west-facing lanterns. Self-cleaning and solar control coatings block excess heat.
Thermal break profiles: Glazing bars should incorporate thermal breaks to prevent cold bridging.
Ventilation strategy: Opening vents or automated systems prevent heat build-up in summer.
U-value specification: Aim for overall roof U-values of 1.0-1.4 W/m²K for Building Regulations compliance.
Period Property Suitability
For owners of listed buildings, properties in conservation areas, or simply homes with strong period character, timber orangeries offer advantages that aluminium and uPVC cannot match. Planning officers and conservation officers consistently favour hardwood construction for heritage settings.
Why Planners Prefer Timber
Historical authenticity: Timber was the original material for glazed garden structures. It’s contextually appropriate.
Traditional detailing: Moulding profiles, glazing bar proportions, and joinery details can match existing windows and doors.
Appropriate proportions: Timber sections suit traditional sightlines (45-70mm) rather than ultra-slim contemporary profiles.
Paint finishes: Heritage colours and traditional finishes satisfy conservation requirements.
Reversibility: Timber can be repaired, modified, or removed without the permanence concerns of modern materials.
Georgian
1714-1837
Symmetrical design essential
Slim glazing bars (15-20mm)
6-over-6 or 8-over-8 pane patterns
White or off-white finishes
Classical proportions (golden ratio)
Victorian
1837-1901
Ornate decorative details
Coloured glass accents possible
Finials, cresting, ridge tiles
Heritage green, cream, or white
Bay window forms
Edwardian
1901-1910
Lighter, airier proportions
Simpler decoration than Victorian
Large panes with top lights
White predominant
Garden room aesthetic
Listed Building Consent
If your property is Grade I, Grade II*, or Grade II listed, you’ll need Listed Building Consent in addition to planning permission. This involves demonstrating that your orangery design respects the building’s heritage significance. Historic England provides detailed guidance on what this process involves.
We regularly work with conservation officers and have a strong track record of securing approvals on listed properties. Our design approach focuses on complementing existing architecture rather than competing with it.
Investment Guide: Hardwood Orangery Costs
Hardwood orangeries represent a significant investment, but one that adds lasting value to your property. Here’s what to expect in 2026:
Size
Sapele
Oak
Accoya
Small (15-20m²)
£55,000-£75,000
£70,000-£95,000
£65,000-£85,000
Medium (20-30m²)
£75,000-£105,000
£95,000-£135,000
£85,000-£120,000
Large (30-40m²)
£105,000-£140,000
£135,000-£180,000
£120,000-£160,000
Bespoke/Complex
£140,000+
£180,000+
£160,000+
These prices include full design service, structural engineering, manufacture, installation, and internal finishing to shell stage. They exclude groundworks/foundations (typically £8,000-£20,000), internal fit-out (flooring, heating, decoration), and any kitchen installation.
Hardwood Orangery Craftsmen | Established 1973 | 50+ Years Experience
Room Outside has been designing and building timber orangeries across West Sussex, Surrey, Hampshire, Kent, and London for over 50 years. We employ traditional joinery techniques passed down through generations, using only premium hardwoods from certified sustainable sources. Call 01243 538999 to discuss your project.
Technical information in this guide reflects Room Outside’s 50+ years of experience in timber orangery construction, British Standards for structural timber grading, and manufacturer specifications for paint systems and modified timber products. Joinery techniques described represent traditional methods used in our workshop.
Last updated: March 2026 | Author: Room Outside
Frequently Asked Questions
What is a hardwood orangery?
A hardwood orangery is a substantial garden room extension built with timber framing, featuring solid corner pillars or piers, a flat perimeter roof section typically with a central lantern roof, and large glazed areas. Unlike conservatories which are primarily glass, orangeries have more solid construction creating a room that feels like a natural extension of the house.
What timber is best for an orangery?
The best timbers for orangeries are sapele, European oak, and accoya. Sapele offers excellent durability and workability at reasonable cost—our most popular choice. Oak provides traditional aesthetics and exceptional longevity, ideal for period properties. Accoya is modified softwood with superior stability and a 50-year warranty.
How is a timber lantern roof constructed?
A timber lantern roof is constructed with a structural frame of rafters meeting at a central ridge or apex, supported by vertical glazing bars. The frame sits on a timber ring beam above the flat roof section. Quality lanterns use mortise and tenon joinery with engineered timber sections to prevent movement.
Are hardwood orangeries suitable for listed buildings?
Yes, hardwood orangeries are often the preferred choice for listed buildings and conservation areas. Timber construction allows authentic period detailing that planning officers favour. Traditional joinery techniques, appropriate species, and historically accurate finishes help secure Listed Building Consent approval.
What joinery techniques are used in quality orangeries?
Quality hardwood orangeries use traditional joinery including mortise and tenon joints for structural connections, wedged through-tenons for maximum strength, scribed joints where mouldings meet, and finger joints in engineered sections for stability. These techniques create lasting structures that can be repaired rather than replaced.
What paint systems work best on hardwood orangeries?
The best paint systems are microporous exterior wood finishes that allow moisture vapour to escape while protecting against weather. Quality factory-applied systems include primer, undercoat, and finish coats in controlled conditions. Brands like Teknos, Sikkens, and Rubio Monocoat offer 8-15 year durability between recoats.
How much does a hardwood orangery cost?
Hardwood orangeries typically cost £60,000-£150,000+ depending on size, timber species, and specification. A medium-sized sapele orangery of 20-30m² costs £75,000-£105,000. Oak construction adds 20-30%. These prices include design, manufacture, installation, and finishing but exclude groundworks and internal fit-out.
How long does a hardwood orangery last?
A well-built hardwood orangery will last 50-80 years or more with proper maintenance. The timber frame itself can last indefinitely if protected from moisture. Joinery using traditional techniques can be repaired rather than replaced. Many Georgian and Victorian timber orangeries are still standing after 150+ years.
Call us anytime – David, our digital assistant, will take a few details so the right specialist can follow up personally. 01243 538999 or request a consultation online
Ready to Create Your Hardwood Orangery?
From Georgian elegance in oak to contemporary warmth in sapele, we bring traditional craftsmanship to every timber orangery we build. Fifty years of expertise, one conversation to start.
Designing a Bespoke Orangery: From Initial Vision to Architectural Reality | Room Outside
Premium Editorial
Designing a Bespoke Orangery
From Initial Vision to Architectural Reality
16 min read
Design Process Guide
50+ Years Experience
The Art of Bespoke Design
A bespoke orangery is more than a building project—it’s a creative collaboration that transforms how you live. Unlike off-the-shelf solutions that force your vision to fit standardised dimensions, bespoke design starts with your property, your lifestyle, and your aspirations, then crafts a unique architectural response.
This guide reveals the complete journey from initial inspiration to finished structure. Understanding each stage helps you participate meaningfully in the design process, make informed decisions, and ultimately achieve an orangery that feels inevitable—as if it was always meant to be part of your home.
4-8
Months total process
8
Key design stages
100+
Decisions refined
1
Unique creation
What Defines a Bespoke Orangery?
The term “bespoke” is often misused in construction. A truly bespoke orangery isn’t simply a standard design in a custom size—it’s a ground-up architectural creation conceived specifically for your property, requirements, and aesthetic preferences.
Bespoke vs. Made-to-Measure: The Critical Difference
Made-to-measure takes an existing design and adjusts dimensions to fit your space. The proportions, details, and overall character remain essentially unchanged.
Bespoke creates an entirely new design from scratch. Every proportion, every detail, every material choice responds to your specific context. The result exists nowhere else—it’s yours alone.
The Defining Characteristics of an Orangery
Orangeries occupy a unique position between conservatories and traditional extensions. Their architectural DNA includes:
Solid corner pillars: Brick, stone, or rendered columns that anchor the structure and provide thermal mass
Perimeter flat roof: An insulated roof section around the edges, creating internal pelmets for lighting and services
Central glass lantern: A raised glazed roof section flooding the interior with natural light
Substantial appearance: More extension-like than a conservatory, with greater visual weight
Superior thermal performance: The solid elements provide insulation that fully glazed structures cannot match
The Design Journey: Eight Stages
Creating a bespoke orangery follows a structured yet flexible process. Each stage builds upon the last, progressively refining your vision into buildable reality.
1
Initial Consultation & Discovery
1-2 weeks
The journey begins with listening. A skilled designer seeks to understand not just what you want, but why you want it—the underlying aspirations that will shape every subsequent decision.
How do you currently use your home? What frustrations exist?
How do you envision using the new space?
What architectural styles appeal to you?
What materials and colours resonate?
What’s your investment range?
Are there constraints we should know about?
2
Site Survey & Analysis
1 day + analysis
The physical context shapes everything. A comprehensive survey captures not just dimensions, but the subtle factors that influence design success.
With understanding and analysis complete, design creativity begins. Initial concepts explore different approaches—testing proportions, styles, and configurations.
Sketch designs exploring options
3D visualisations showing spatial impact
Scale drawings indicating proportions
Material mood boards
Initial budget estimates
Discussion of trade-offs and possibilities
4
Design Development
2-4 weeks
The chosen concept is developed into a detailed design. Every element is specified, from major structural decisions to finishing details.
Detailed floor plans and elevations
Material specifications (frames, glazing, roofing, masonry)
Hardware selections (doors, windows, handles)
Interior elements (flooring, lighting, heating)
Refined 3D visualisations
Detailed cost proposal
5
Planning & Approvals
8-12 weeks
Securing necessary permissions ensures your orangery is legally compliant and protects your investment.
Assessment of Permitted Development rights
Planning application if required
Listed Building Consent for heritage properties
Building Regulations submission
Party Wall notifications if applicable
Liaison with local authority throughout
6
Technical Design & Engineering
2-3 weeks
The design is translated into precise manufacturing and construction documentation.
Structural engineering calculations
Foundation design
Detailed manufacturing drawings
Glazing schedules and specifications
Services routing (electrical, heating)
Final quality assurance review
7
Manufacturing
4-6 weeks
Components are fabricated in controlled factory conditions, ensuring precision and quality impossible to achieve on-site.
Frame fabrication and finishing
Glazing unit manufacture
Roofing components prepared
Hardware and fittings assembled
Quality control inspections
Delivery coordination
8
Construction & Completion
4-8 weeks
The vision becomes reality as skilled craftspeople bring together all elements on site.
Site preparation and excavation
Foundation construction
Masonry work for pillars and plinths
Frame installation
Roofing and glazing
Internal finishing and handover
The best bespoke designs feel inevitable—as though the orangery was always part of the original architect’s intention, simply waiting to be realised.
— Design Philosophy, Room Outside
Design Considerations: The Elements of Excellence
Bespoke design involves hundreds of decisions, each contributing to the final result. Understanding the key considerations helps you engage meaningfully with the design process.
Proportional Harmony
The orangery should relate to your home’s existing proportions—window rhythms, floor-to-ceiling heights, and architectural language.
Light & Orientation
Understanding how sunlight moves across your site throughout the day and year shapes glazing placement and shading strategies.
Interior Flow
How will the orangery connect to existing rooms? How will furniture be arranged? Traffic patterns and sight lines matter.
Material Palette
Frames, masonry, roofing, and finishes must work together and complement your existing property’s materials.
Garden Integration
The orangery mediates between house and garden. Consider views, access to outdoor spaces, and landscape design.
Services Integration
Electrical outlets, lighting design, heating systems, and smart home integration should be planned from the start.
Material Choices: Building Character
The materials you choose fundamentally shape your orangery’s character, performance, and longevity. Each option brings distinct qualities.
Hardwood Timber
Classic warmth & character
Aesthetic: Natural warmth, traditional character, ages beautifully
Species: Oak, sapele, accoya, or engineered options
Finish: Painted, stained, or natural oiled
Lifespan: 40-60+ years with maintenance
Maintenance: Periodic refinishing (5-10 years)
Heritage: Ideal for period properties and Conservation Areas
Aesthetic: Traditional feel without maintenance burden
Investment: Premium option combining benefits
Masonry Options
The structural foundation
Brick: Match existing house or complementary contrast
Natural stone: Premium option for character properties
Render: Smooth or textured finish, painted any colour
Reconstructed stone: Cost-effective alternative to natural
Cladding: Timber, composite, or modern materials
Thermal mass: Solid elements moderate temperature swings
Matching: Sourcing reclaimed materials for seamless integration
The Lantern Roof: Crown of the Orangery
The lantern roof is the defining architectural element of an orangery—the feature that floods the interior with light while creating visual drama. Lantern design involves careful consideration of proportion, glazing, and structural elements.
Lantern Roof Design Elements
Pitch angle: Steeper pitches shed water better and create more internal volume; shallower pitches are more contemporary
Glazing bars: The framework dividing glass panels—aluminium for slim profiles, timber for traditional character
Ridge details: Decorative finials, cresting, or clean minimal lines depending on style
Ventilation: Integrated vents in the lantern promote natural airflow and temperature regulation
Glass specification: Solar control coatings essential for roof glass; self-cleaning coatings reduce maintenance
Proportion: The lantern’s size relative to the perimeter roof creates visual balance
Lantern Style
Character
Best Suited For
Traditional pitched
Classic Georgian/Victorian aesthetic with decorative details
Period properties, Conservation Areas
Contemporary minimal
Slim frames, clean lines, maximum glass
Modern homes, minimalist interiors
Flat roof lantern
Low profile, unobtrusive, clean geometry
Bungalows, restricted height situations
Structural glass
Virtually frameless, maximum transparency
Ultra-contemporary designs
Investment: Understanding the Costs
Bespoke orangeries represent significant investment. Understanding cost factors helps set realistic expectations and make informed decisions about where to allocate budget.
Category
Description
Typical Range
Modest bespoke
3m x 3m, aluminium frame, standard glazing
£50,000-£70,000
Mid-range bespoke
4m x 4m, premium glazing, quality masonry
£70,000-£100,000
Premium bespoke
Larger size, hardwood/hybrid, high-spec throughout
£100,000-£150,000
Exceptional projects
Large scale, complex design, premium everything
£150,000+
Factors Influencing Cost
Size: Larger orangeries cost more, but cost-per-square-metre often decreases with scale
Frame material: Hardwood typically 20-30% more than aluminium
Glazing specification: Premium temperature-controlled glass adds 15-25% over standard
Masonry complexity: Natural stone significantly more than brick or render
Site conditions: Difficult access, sloping sites, or complex foundations add cost
Interior specification: Flooring, lighting, heating, and finishes vary widely
Planning requirements: Listed buildings and complex applications incur additional fees
Value Perspective
A well-designed bespoke orangery typically adds 5-10% to property value—often exceeding the construction cost in desirable areas. More importantly, it transforms daily living: breakfast in morning sunlight, evening entertaining that flows between indoors and out, a year-round connection to your garden. The value extends far beyond financial return.
Working With Your Designer
The designer-client relationship is central to bespoke success. Understanding how to participate productively in this collaboration leads to better outcomes.
Getting the Most From the Design Process:
Gather inspiration: Collect images that resonate—not just orangeries, but interiors, materials, and atmospheres that appeal to you
Be honest about budget: A good designer works within constraints—being upfront enables realistic proposals
Explain how you live: Daily routines, entertaining patterns, and family dynamics inform functional design
Share concerns openly: Worries about neighbours, planning, or practical issues are better addressed early
Trust expertise: When recommendations differ from your initial ideas, explore the reasoning—experience often reveals considerations you hadn’t anticipated
Allow time: Bespoke design cannot be rushed. Invested time during design prevents costly changes during construction
Room Outside
Bespoke Orangery Specialists | Established 1973 | 50+ Years Experience
Room Outside creates bespoke orangeries that transform homes across the South East. Each project begins with listening, develops through creative collaboration, and culminates in architectural spaces that feel inevitable—as though they were always meant to be. Call 01243 538999 to begin your design journey.
This editorial draws on 50+ years of Room Outside’s experience designing and building bespoke orangeries across Kent, Surrey, Sussex, Hampshire, and London. The design process described reflects our collaborative approach refined over five decades.
Last updated: March 2026 | Author: Room Outside Design Team
Frequently Asked Questions
What is a bespoke orangery?
A bespoke orangery is a custom-designed glazed extension featuring solid corner pillars, a perimeter flat roof, and central glass lantern. Unlike off-the-shelf designs, every element is tailored specifically to your property’s architecture, your lifestyle, and your aesthetic preferences.
How long does the design and build process take?
The complete process typically takes 4-8 months: design development (4-8 weeks), planning if required (8 weeks), Building Regulations (4-6 weeks), manufacturing (4-6 weeks), and construction (4-8 weeks). Complex projects may take longer.
How much does a bespoke orangery cost?
Bespoke orangeries typically cost £50,000-£150,000+ depending on size, materials, and specification. A modest design starts around £50,000-£70,000, while large premium projects with hardwood frames and high-spec throughout reach £100,000-£150,000 or more.
What’s the difference between an orangery and conservatory?
Orangeries feature solid corner pillars, a flat perimeter roof with internal pelmet, and a central glass lantern—creating a more substantial, extension-like appearance. Conservatories have predominantly glazed walls and roofs. Orangeries typically offer better thermal performance.
Do I need planning permission for an orangery?
Many orangeries fall within Permitted Development rights if they meet size limits (3m depth attached, 4m detached, max 4m height, under 50% garden). Listed buildings always require consent. Conservation Areas have additional restrictions. Your designer will advise.
What materials are best for orangery frames?
Premium options include hardwood timber (warm character, traditional appeal), aluminium (slim sightlines, minimal maintenance), and timber-aluminium hybrid (timber interior, aluminium exterior). Each offers distinct aesthetic and performance characteristics.
Can an orangery be used year-round?
Yes—with proper specification. Temperature-controlled glazing, insulated roof sections, underfloor heating, and appropriate ventilation create comfortable conditions throughout the year. A well-designed orangery becomes a genuine extension of your living space.
How do I choose between contemporary and traditional design?
Consider your property’s architecture, personal taste, and context. Period homes often suit traditional detailing, while contemporary designs complement modern properties. Sometimes contrast works beautifully. A skilled designer helps navigate these choices.
Call us anytime – David, our digital assistant, will take a few details so the right specialist can follow up personally. 01243 538999 or request a consultation online
Ready to Begin Your Design Journey?
Every bespoke orangery starts with a conversation. Share your vision with our design team and discover how we can transform your home—creating a space that feels like it was always meant to be there.
Orangery Installers Cost: The Complete UK Price Breakdown for 2026
Orangery Installers Cost 2026 UK | Full Price Breakdown & Guide | Room Outside
Cost Guide 2026
Orangery Installers Cost: The Complete UK Price Breakdown for 2026
How much do orangery installers actually cost? From labour rates and foundations to glazing, lantern roofs, and finishing – every cost explained. Avoid hidden charges, compare quotes confidently, and understand what you should really be paying.
20 min read
Updated May 2026
Verified 2026 Prices
Quick Answer: Orangery Installers Cost
Orangery installers cost between £150 and £300 per day for general labour in the UK in 2026. However, the total installed cost of an orangery – including design, foundations, materials, glazing, fitting, and internal finishing – ranges from £30,000 for a small build (10-16m²) to £120,000+ for large or bespoke installations. Per square metre, expect to pay £1,500-£4,700 depending on materials and specification. Premium installers who manage the entire project typically deliver better long-term value than coordinating separate tradespeople.
Key Facts: Orangery Installers Cost (UK 2026)
Daily labour rate: £150-£300 per day (general builders); specialist glazing installers typically higher
Total installed cost: Small (10-16m²) £30,000-£50,000 | Medium (20-35m²) £50,000-£85,000 | Large (35m²+) £80,000-£120,000+
Cost per m²: £1,500 (uPVC) to £4,700 (premium aluminium/hardwood)
Typical timeline: 12-20 weeks from deposit to completion
Hidden costs to watch: Drainage diversion, structural engineer, building regulations, landscaping
Property value uplift: 5-15% when professionally designed and installed
Warranty: Reputable installers offer 10-year structural warranty as standard
£150-£300
Labour per day
£30k-£120k+
Total installed cost
12-20
Weeks to complete
5-15%
Property value uplift
1. What Do Orangery Installers Actually Cost?
When homeowners search for “orangery installers cost,” they’re usually asking one of two questions: what does the labour alone cost, or what does the entire installed orangery cost? Both figures matter, but understanding how they relate to each other prevents nasty surprises when quotes arrive.
An orangery installation involves multiple specialist trades working across several months. Unlike a simple conservatory that might be assembled from a kit in a few days, orangeries require groundwork contractors, bricklayers, structural steelwork, specialist glazing installers, roofers, electricians, plumbers, plasterers, and decorators. The cost of orchestrating all of these trades – or choosing an installer who manages the entire process – is where the real pricing differences emerge.
1.1 Labour-Only Costs
If you’re coordinating trades yourself (which we generally don’t recommend for orangeries), here are typical 2026 daily rates across the UK:
General builder/labourer: £150-£250 per day
Bricklayer: £200-£300 per day
Roofer: £180-£280 per day
Electrician: £180-£300 per day
Plumber: £180-£250 per day
Plasterer: £150-£220 per day
Specialist glazing installer: £200-£350 per day
Painter/decorator: £150-£220 per day
London and the South East sit at the higher end of these ranges, while the North and Midlands tend to be lower. However, labour-only rates can be misleading because they don’t include management, warranties, or the specialist knowledge needed to create a watertight, thermally efficient structure.
1.2 Full Installation Costs (Supply and Fit)
Most homeowners opt for a full supply-and-fit service where one company handles everything from design through to handover. This is where the “orangery installers cost” becomes meaningful as a single figure. In 2026, typical fully installed costs are:
2. Orangery Installers Cost by Size (2026 UK Prices)
Size is the single biggest factor determining orangery installation costs. Below are realistic 2026 price ranges that include design, planning, materials, all labour, building works, and VAT.
Size Category
Area
Installed Cost
Cost per m²
Small
10-16 m²
£30,000 – £55,000
£2,500 – £4,700
Medium
20-35 m²
£50,000 – £85,000
£2,400 – £4,400
Large
35-50 m²
£80,000 – £120,000+
£2,200 – £3,900
Bespoke / Complex
Variable
£120,000 – £200,000+
Variable
Notice how the cost per square metre generally decreases as size increases. This is because many fixed costs – design, planning, site setup, foundations – don’t scale proportionally with area. A 30m² orangery doesn’t cost twice as much as a 15m² orangery, making larger builds better value per square metre.
2.1 Cost by Material
Frame material significantly affects both the initial installation cost and the long-term value. Here’s how the three main options compare for a medium 20m² orangery:
Material
Installed Cost (20m²)
Cost per m²
Lifespan
Maintenance
uPVC
£25,000 – £40,000
~£1,500
20-30 years
Low
Aluminium
£45,000 – £85,000
~£2,500
50+ years
Minimal
Hardwood Timber
£50,000 – £100,000
~£3,000
50+ years (maintained)
High (repaint every 5-7 yrs)
While uPVC is the cheapest option upfront, its shorter lifespan means you may need a complete replacement within 25 years. An aluminium orangery offers the best balance of longevity, thermal performance, and maintenance-free living. Premium hardwood delivers beautiful aesthetics but demands ongoing care to maintain its condition.
3. Orangery Installers Cost: Full Breakdown
Understanding where your money goes helps you evaluate quotes and spot installers who may be cutting corners. Here is a detailed breakdown of orangery installation costs, using a medium-sized (20m²) aluminium orangery as the example.
Cost Breakdown: Medium Aluminium Orangery (20m², ~£85,000)
Materials & Frame Structure(~40%)£34,000
Glazing & Glass Technology(~22%)£18,700
Installation Labour(~18%)£15,300
Foundations & Groundworks(~13%)£11,050
VAT(~7%)£5,950
Total Installed Cost~£85,000
3.1 Materials and Structure (~40%)
The largest portion of your orangery installers cost goes into materials. This includes the aluminium or timber frame system with thermal breaks, insulated cavity walls (achieving U-values as low as 0.18), solid roof insulation (typically 150mm), internal plasterboard lining, external brickwork to match your property, structural steelwork where required, and all fixings, flashings, and membranes. Premium frame systems with genuine thermal break technology cost more than basic profiles, but the difference in year-round comfort is substantial.
3.2 Glazing and Glass (~22%)
Glazing is where specification choices dramatically affect cost. Standard double glazing with Low-E coating and argon gas fill represents the baseline. Upgrading to triple glazing adds approximately 15-25% to the glazing element. Solar control glass (essential for south-facing orangeries), self-cleaning coatings, and premium lantern roof systems with slim aluminium bars all increase this portion. For a New Generation Glass specification, expect this element to represent a higher percentage of the total cost.
3.3 Installation Labour (~18%)
Professional installation labour covers the specialist team who erect the frame, install glazing units, fit the lantern roof, hang doors and windows, and make the structure weathertight. This is distinct from the groundwork and finishing trades. Specialist orangery installers command higher daily rates than general builders because the work demands precision engineering – a poorly fitted lantern roof will leak, and incorrectly installed thermal breaks will fail to insulate.
3.4 Foundations and Groundworks (~13%)
Every orangery needs proper foundations, typically reinforced concrete strip or trench fill foundations excavated to a depth determined by building control (usually 900mm-1200mm depending on soil type and proximity to trees). This element includes excavation, concrete, reinforcement, drainage connections, damp-proof course, and backfilling. Poor ground conditions, high water tables, or the need to relocate drains can push this element higher.
3.5 Additional Costs Not Always in Quotes
Some costs sit outside the main quote. Be aware of:
Building regulations drawings and approval: £1,500-£2,500
Structural engineer (if required): £500-£1,500
Planning permission (if required): £200-£600
Drainage diversion: £200-£5,000 (highly variable)
Landscaping and making good: £1,000-£5,000
Underfloor heating: £1,000-£4,500 depending on system and area
Electrics (lighting, sockets, consumer unit upgrade): £1,500-£4,000
The most common hidden orangery installation costs catch homeowners by surprise: drain diversion (discovered only during groundwork), asbestos in existing structures being altered, unexpected ground conditions requiring piling (adding £3,000-£10,000), and consumer unit upgrades for new electrics. A thorough site survey by an experienced installer should identify most of these before quoting.
Always ask: “Is this a fixed price or an estimate? What’s excluded?”
Want a Precise Quote for Your Orangery?
Our site surveys identify all costs upfront – no hidden charges, no surprises.
4. Specialist Orangery Installer vs General Builder: Cost Comparison
One of the most important decisions affecting your orangery installers cost is choosing between a specialist orangery company and a general builder. The initial quote may tell one story; the long-term cost tells another.
Factor
Specialist Orangery Installer
General Builder
Initial quote
Higher (all-inclusive)
Lower (often excludes items)
Design service
In-house, 3D visuals, bespoke
Often outsourced or basic
Planning & building regs
Handled as part of service
Often your responsibility
Glazing expertise
Specialist knowledge, thermal performance focus
May subcontract glazing work
Lantern roof quality
Precision-engineered, tested systems
Variable quality, leak risk
Warranty
Typically 10-year structural
Often limited or piecemeal
Project management
Single point of contact
You coordinate multiple trades
Cost overruns
Fixed-price contracts common
Estimates often exceeded
Long-term cost (40 years)
Lower (quality build, no remedial work)
Higher (repairs, replacements likely)
A specialist installer typically costs 15-30% more upfront than a general builder’s estimate. However, the all-inclusive nature of specialist quotes, combined with superior build quality and comprehensive warranties, almost always represents better value over the structure’s lifetime. At Room Outside, we’ve seen numerous homeowners come to us to remediate orangeries originally built by general contractors – correcting leaks, replacing inadequate glazing, and addressing thermal failures. The cost of remediation often exceeds the original saving.
5. 10 Factors That Affect Orangery Installers Cost
Beyond size and materials, several factors can push your orangery installation costs up or down. Understanding these helps you make informed trade-offs during the design process.
📐 1. Size and Footprint
The single biggest cost driver. Every additional square metre adds materials and labour. However, fixed costs (design, planning, site setup) are spread across larger builds, improving per-m² value.
🏗️ 2. Ground Conditions
Clay soils, high water tables, tree root proximity, or sloping sites all increase foundation costs. Piling can add £3,000-£10,000 to the groundwork element alone.
🪟 3. Glazing Specification
Standard double glazing vs triple glazing, solar control coatings, self-cleaning glass, and structural glass roofs all affect cost. Premium glazing adds 15-30% to this element.
🚪 4. Door Choices
Bifold doors (£3,000-£8,000), sliding doors (£2,500-£7,000), French doors (£1,500-£3,500). Wider spans and premium hardware increase costs.
🏠 5. Roof Complexity
A simple pyramid lantern costs less than a multi-ridge design. Curved glass, bespoke shapes, and motorised vents add to the price of the lantern roof element.
📋 6. Planning Requirements
Permitted Development keeps costs down. Full planning applications add £200-£600 plus professional fees. Listed building consent can extend timelines and costs significantly.
🔌 7. Heating and Electrics
Underfloor heating (£1,000-£4,500) vs radiators (from £200). Quantity of sockets, lighting design, and consumer unit upgrades all add to the installation cost.
🎨 8. Finishing Quality
Internal plastering, flooring, decoration, and bespoke joinery like internal pelmets or columns affect final cost. Premium finishes can add £5,000-£15,000.
📍 9. Location
Regional labour rates vary considerably. London and the South East carry a premium of 15-25% over national averages. Rural locations may add transport costs for materials.
🚧 10. Site Access
Narrow side passages, limited parking for delivery vehicles, or rear-access-only sites increase labour time and delivery costs. Crane hire for glass panels adds further expense.
6. Orangery Installation Timeline and Labour Costs
Understanding how long each phase takes helps you anticipate both the disruption and the cost implications. Longer timelines mean more labour days and higher overall orangery installers cost.
Phase
Duration
Approximate Labour Cost
Key Activities
Design & Survey
2-4 weeks
Included in quote
Site survey, measurements, 3D design, specifications
The total on-site construction time for a medium orangery is typically 6-10 weeks, with the full project timeline of 12-20 weeks including design, manufacturing, and planning phases. Premium installers overlap phases where possible – for instance, manufacturing frames while groundworks are being completed – to minimise overall project duration.
7. Orangery Installers Cost vs Extension vs Conservatory
Homeowners frequently compare orangery costs with traditional extensions and conservatories. Here’s how they stack up in 2026:
Feature
Orangery
Brick Extension
Conservatory
Cost per m²
£1,500-£4,700
£2,000-£3,500
£1,000-£2,500
Natural light
Excellent (lantern + glazed walls)
Limited (windows only)
Maximum (all glass)
Year-round comfort
Excellent (insulated roof + glazing)
Excellent (solid construction)
Poor to moderate (heat loss/gain)
Architectural presence
High (lantern roof, columns)
Moderate (matches existing)
Low (can look added-on)
Property value uplift
5-15%
5-10%
3-5%
Lifespan
50+ years (aluminium)
60+ years
15-25 years
Planning
Often Permitted Development
Often requires planning
Usually Permitted Development
The orangery sits at the sweet spot between extensions and conservatories – delivering the architectural substance and year-round comfort of an extension, with the natural light and garden connection of a conservatory. For many homeowners across Southern England, this combination delivers the best return on investment.
8. How to Reduce Orangery Installation Costs (Without Cutting Quality)
There are legitimate ways to reduce your orangery installers cost without compromising the quality or longevity of the finished space. Here’s what works and what doesn’t:
8.1 Smart Savings
Choose standard sizes: Bespoke dimensions cost more than standard profiles. Work with your installer to optimise dimensions around standard glazing unit sizes.
Simplify the roof design: A single pyramid or ridge lantern costs significantly less than multi-pitch or curved alternatives whilst still delivering excellent light.
Phase the interior: Have the orangery built as a weathertight shell with basic electrics, then complete interior decoration yourself or in stages.
Time your project wisely: Autumn and winter installations may attract discounts when installers have more availability. You also avoid the spring/summer rush.
Stay within Permitted Development: Designing to PD limits avoids planning application costs and the risk of delays or refusal.
Get multiple quotes: At least three detailed, like-for-like quotes from specialist installers allow meaningful comparison.
8.2 False Economies to Avoid
Cheapest frame material: Budget uPVC may save initially but delivers shorter lifespan, poorer aesthetics, and lower property value uplift.
Self-managing trades: Coordinating separate groundworkers, bricklayers, glaziers, and roofers yourself risks delays, finger-pointing when issues arise, and no single warranty.
Skipping the structural engineer: If your project needs one and you skip it, building control may halt the work – costing far more in delays.
Choosing based on price alone: The cheapest quote is almost never the best value. Ask what’s excluded, check the warranty, and visit completed projects.
9. How to Choose the Right Orangery Installer
The installer you choose has more impact on the final result than almost any other decision. Here’s what to look for when comparing orangery installers and their costs.
Orangery Installer Checklist
10+ years of orangery-specific experience (not just general building)
In-house design team producing 3D visuals before you commit
Own installation teams (not subcontracted)
Showroom or completed projects you can visit in person
Fixed-price written quotation (not an estimate)
Clear breakdown showing what’s included and excluded
10-year structural warranty as standard
Handles planning and building regulations as part of service
Trade body membership (e.g., Glass and Glazing Federation)
Public liability and employer’s liability insurance
Verified reviews and testimonials from real customers
After-sales service and support beyond handover
When collecting quotes, ensure you’re comparing like-for-like. A quote of £45,000 that excludes foundations, building regulations, electrics, and heating is not cheaper than a £65,000 quote that includes everything. Ask every installer: “What would I need to pay on top of this figure to have a finished, usable room?”
10. Orangery Installers Cost by Region
Labour rates and overall project costs vary across the UK. Here’s how orangery installation costs typically differ by region for a medium-sized (20m²) aluminium orangery in 2026:
Region
Typical Installed Cost (20m²)
Labour Premium
Greater London
£65,000 – £100,000
+20-25% above national average
Surrey & Kent
£55,000 – £90,000
+10-20%
Sussex & Hampshire
£50,000 – £85,000
+5-15%
Berkshire & Dorset
£50,000 – £85,000
+5-15%
Midlands
£45,000 – £75,000
National average
North of England
£40,000 – £70,000
-5-10%
These regional differences primarily reflect labour rates rather than material costs, which are broadly consistent nationwide. However, choosing a local specialist who knows your area’s planning authorities and building conditions can save both time and money compared to bringing in installers from further afield.
Room Outside serves homeowners across Kent, Surrey, East and West Sussex, Hampshire, London, Berkshire, Dorset, and Essex – bringing over 50 years of local expertise to every project.
11. Is the Cost of Orangery Installation Worth It?
The cost of hiring orangery installers represents a significant investment – so it’s reasonable to ask whether it pays off. The answer, for most homeowners, is yes, on multiple fronts.
11.1 Property Value
A well-designed, professionally installed orangery typically adds 5-15% to property value. On a £500,000 property, that’s £25,000-£75,000 of added value. Estate agents consistently rank quality orangeries among the most desirable features for buyers, particularly in the South East where indoor-outdoor living is highly valued. The key word is “quality” – a poorly built orangery can actually reduce value, which is why choosing the right installer matters so much.
11.2 Lifetime Cost
Consider the 40-year cost picture:
Premium aluminium orangery: £85,000 initial cost, minimal maintenance, 50+ year lifespan = ~£85,000 total over 40 years
Budget conservatory: £15,000 initial cost, but replacement at 20 years (~£20,000) plus ongoing repairs = ~£40,000+ over 40 years for inferior space
Standard brick extension: ~£60,000 initial cost, replacement windows at 20 years (~£5,000) = ~£65,000 over 40 years with less light
When you factor in energy savings from superior insulation, reduced maintenance costs, and the property value premium, a quality orangery installation often represents the most cost-effective way to add beautiful, usable living space to your home.
11.3 Beyond the Numbers
Some benefits resist quantification: the daily pleasure of a light-filled kitchen-diner, the connection with your garden through every season, the space for family gatherings, and the joy of a room that genuinely transforms how you live at home. These are the reasons most orangery owners say they wish they’d done it sooner.
Room Outside
Orangery Installers & Specialists | Established 1973
With over 50 years of experience, Room Outside designs and installs premium orangeries across Southern England. Our in-house team handles everything from initial design and planning applications through to construction, glazing, and finishing – giving you a single point of contact and a fixed-price guarantee. We’ve installed hundreds of orangeries across Kent, Surrey, Sussex, Hampshire, and London.
Official sources: UK Planning Portal (planningportal.co.uk) – Permitted Development rights and planning fees; RICS – construction cost data 2026; Building Regulations 2010 (as amended) – Part L requirements.
Industry bodies: Glass and Glazing Federation – installer accreditation standards; Council for Aluminium in Building – technical guidance; Federation of Master Builders – builder rates survey 2026.
Cost data methodology: Prices reflect Room Outside’s project data and verified industry sources for Southern England, updated May 2026. Regional variations apply. All costs include VAT unless stated.
Last updated: May 2026 | Next review: November 2026
General builders charge £150-£250 per day, while specialist glazing installers charge £200-£350 per day. However, most orangery projects are quoted as a fixed total price rather than daily rates, covering all trades and materials in one figure.
What’s the cheapest orangery you can install?
The cheapest fully installed orangeries start around £15,000-£25,000 for small uPVC builds (10-16m²). However, budget builds often compromise thermal efficiency and longevity. A mid-range aluminium orangery from £30,000 delivers significantly better long-term value.
Do orangery installers include VAT in their quotes?
Reputable installers include VAT in quoted prices. Always confirm whether a quote is inclusive or exclusive of VAT – 20% makes a substantial difference. Ask: “Is this the total I will pay?”
How much deposit do orangery installers require?
Typical deposits range from 10-25% of the total project cost, payable when you sign the contract. Staged payments throughout the project are standard. Never pay the full amount upfront.
Can I install an orangery myself to save money?
Self-installation is not recommended for orangeries. They require structural calculations, Building Regulations compliance, specialist glazing handling, and watertight lantern roof installation. Errors can be extremely costly to fix and may compromise safety.
Do orangery installers offer finance?
Many specialist installers offer finance options, from interest-free periods to longer-term payment plans. Check whether the installer is FCA-regulated if they offer credit directly. Room Outside can discuss payment options during consultation.
How do I know if an orangery installer’s quote is fair?
Get at least three quotes from specialist installers (not general builders). Ensure quotes cover the same specification, and compare what’s included and excluded. Fair prices for a medium aluminium orangery (20m²) fall between £50,000-£85,000 in 2026.
What warranty should orangery installers provide?
Expect a minimum 10-year structural warranty on the build, plus manufacturer warranties on glazing (typically 10 years), frames (20-30 years for powder coating), and hardware (5-10 years). Insurance-backed guarantees provide protection if the installer ceases trading.
📞 01243 538999 – Call anytime. David, our digital assistant, will take a few details so the right specialist can follow up personally.
Ready to Get an Accurate Orangery Quote?
No hidden costs, no surprises. Our free site survey and design consultation gives you a fixed-price quote covering everything from foundations to finishing touches.
Everything you need to know about aluminium orangeries: costs, thermal performance, design options, planning permission, and how they compare to uPVC and timber. Expert advice from specialists with 50+ years experience.
22 min read
Updated May 2026
UK Specialist Guide
Quick Answer: Aluminium Orangeries
Aluminium orangeries are premium home extensions combining solid perimeter roofs with central glass lanterns, supported by slim aluminium frames. They offer exceptional strength, U-values from 1.2 W/m²K (thanks to thermal breaks), and 50+ year lifespans with minimal maintenance. Costs range from £30,000 for small designs to £120,000+ for large, complex installations. Aluminium is ideal for modern extensions and period properties alike, available in any RAL colour.
Thermal performance: U-values from 1.2 W/m²K with thermal break technology
Lifespan: 50+ years with minimal maintenance
Frame thickness: Up to 50% slimmer than uPVC, maximizing glass area
Maintenance: Occasional cleaning only – no painting required
Colours: Any RAL colour available, including anthracite grey (RAL 7016), black, cream, green
Planning: Often Permitted Development; check local rules for listed/conservation areas
Property value: Can add 5-10% to home value
£30k-£120k+
Typical cost range
1.2
U-value (W/m²K)
50+
Years lifespan
5-10%
Value added
1. What is an Aluminium Orangery?
An aluminium orangery is a home extension characterized by a solid flat roof perimeter, a central glazed lantern, and large windows or glazed panels set within robust perimeter walls—all constructed using aluminium frames. Unlike conservatories which are predominantly glass (typically 75%+ glazed roofs), orangeries maintain architectural presence through solid roof sections while the glass lantern floods the interior with natural light.
When crafted in aluminium, these structures benefit from the material’s exceptional properties: high strength-to-weight ratio allows for slim sightlines (frames up to 50% slimmer than uPVC), while thermal break technology ensures energy efficiency. Aluminium orangeries can be attached to existing properties or designed as standalone garden rooms.
Key Components of an Aluminium Orangery
Perimeter roof: Solid insulated panels around the edges, typically finished with plasterboard internally and roofing materials externally
Central lantern: Glazed roof structure that rises above the flat roof, allowing light from above
Aluminium frames: Slim, strong profiles supporting glazing and roof structures
Base walls: Often dwarf walls (600-900mm high) or full-height aluminium columns
Glazing: Double or triple glazed units with Low-E coatings and argon gas filling
The aluminium used in modern orangeries is typically powder-coated for durability and available in virtually any colour, from classic anthracite grey (RAL 7016) to heritage shades like cream or green, making them suitable for both contemporary and traditional properties.
2. Why Choose Aluminium for Your Orangery?
Aluminium has become the material of choice for premium orangeries, offering advantages that timber and uPVC cannot match. Here’s why homeowners across Kent, Surrey, Sussex, Hampshire, and London are specifying aluminium.
2.1 Strength with Slim Profiles
Aluminium’s high strength-to-weight ratio means frames can be significantly slimmer than uPVC (up to 50% thinner) while maintaining structural integrity. This maximizes glass area, increasing natural light and views. For example, an aluminium orangery in Surrey might feature floor-to-ceiling glazing with barely visible frames, creating a seamless connection with the garden.
2.2 Thermal Efficiency (Thermal Break Technology)
Modern aluminium orangeries incorporate thermal breaks – insulating barriers made from polyamide or similar materials placed between interior and exterior aluminium surfaces. This prevents heat transfer, achieving U-values as low as 1.2 W/m²K. Combined with double or triple glazing (Low-E coatings, argon gas), aluminium orangeries are comfortable year-round, meeting and exceeding Building Regulations Part L.
2.3 Durability and Longevity
Aluminium is naturally resistant to corrosion, rust, and UV degradation. Powder-coated finishes (applied electrostatically) provide additional protection, typically guaranteed for 20-30 years. Unlike timber, aluminium doesn’t rot, warp, or require repainting. An aluminium orangery installed today will likely last 50+ years with nothing more than occasional cleaning.
2.4 Low Maintenance
For busy homeowners in Sussex or Hampshire, low maintenance is a major selling point. Aluminium orangeries need only:
Occasional washing with soapy water to remove dirt
Annual gutter and drainage checks
Lubrication of hinges and locks (every 2-3 years)
No painting, staining, or preservative treatments are required.
2.5 Design Flexibility
Aluminium can be fabricated into virtually any shape, supporting bespoke designs:
Colours: Any RAL colour available – anthracite grey (most popular), black, cream, green, grey, white
Dual-colour options: Different colour inside and out (e.g., white internally, anthracite externally)
Door integration: Seamlessly incorporate bifold, sliding, or French doors in matching aluminium
Lantern styles: Pyramid, ridge, or bespoke lantern designs
2.6 Sustainability
Aluminium is 100% recyclable without loss of quality. The UK aluminium industry recycles approximately 75% of all aluminium produced. Choosing aluminium supports circular economy principles and reduces environmental impact compared to materials that end up in landfill.
🔩 Strength
High strength-to-weight ratio enables slim frames and large glass spans.
☀️ Thermal Efficiency
Thermal breaks achieve U-values from 1.2 W/m²K.
🧼 Low Maintenance
No painting – just occasional cleaning.
🎨 Colour Options
Any RAL colour, dual-colour available.
⏱️ Longevity
50+ year lifespan with proper care.
🌍 Sustainable
100% recyclable, eco-friendly choice.
3. Aluminium vs Timber vs uPVC: Comparison
Choosing between aluminium, timber, and uPVC depends on your priorities – budget, aesthetics, maintenance, and longevity. This comparison helps homeowners in Kent, Surrey, and beyond make informed decisions.
Feature
Aluminium
Timber
uPVC
Frame thickness
Very slim (20-30mm sightlines)
Chunky (50-80mm)
Bulky (60-100mm)
Thermal performance (U-value)
1.2 – 1.6 W/m²K
1.4 – 2.0 W/m²K
1.4 – 1.8 W/m²K
Lifespan
50+ years
50+ years (with maintenance)
20-30 years
Maintenance
Minimal – occasional clean
High – repaint every 5-7 years
Low – occasional clean
Colour options
Any RAL colour, dual-colour
Stains/paints, limited
Limited, often white/cream
Initial cost
£££ (premium)
££ (mid-range)
£ (budget)
Recyclability
100% recyclable
Biodegradable
Difficult to recycle
Aesthetic
Sleek, modern, minimalist
Warm, traditional
Practical, less premium
3.1 When to Choose Aluminium
Aluminium is ideal for:
Contemporary homes requiring slim sightlines
Maximum light and garden views
Low-maintenance lifestyles
Long-term investment (50+ years)
Bespoke designs and custom colours
3.2 When Timber Might Be Better
Timber suits:
Period properties where traditional appearance is paramount
Listed buildings requiring authentic materials
Homeowners willing to maintain regularly
Lower initial budgets (though lifetime costs may equal aluminium)
3.3 When uPVC Might Be Considered
uPVC is appropriate for:
Tight budgets where initial cost is the only factor
Short-term ownership (under 10 years)
Less demanding aesthetic requirements
Properties where appearance is not critical
However, many homeowners find that the long-term value and aesthetics of aluminium justify the higher initial investment.
4. Aluminium Orangery Costs 2026 (UK Guide)
Understanding costs helps with budgeting and comparing quotes. Prices vary based on size, complexity, glazing specification, and site conditions. Below are typical ranges for aluminium orangeries in 2026.
Size Category
Area (m²)
Typical Cost Range
Example Use
Small
10-20 m²
£30,000 – £50,000
Entrance hall, small dining area
Medium
20-35 m²
£50,000 – £80,000
Kitchen-diner, family room
Large
35-50 m²
£80,000 – £120,000+
Open-plan living, garden room
Complex/Bespoke
Variable
£120,000 – £200,000+
Multi-level, curved, heritage projects
Factors Affecting Aluminium Orangery Costs
Size: Larger structures require more materials and labour
Glazing specification: Triple glazing, solar control coatings, self-cleaning glass add cost
Foundation requirements: Ground conditions may require piling or reinforced concrete
Access: Difficult site access increases installation time and cost
Finishes: Dual-colour options, special RAL colours, timber-effect interiors
Doors: Bifold, sliding, or French doors – larger spans cost more
Heating/electrics: Underfloor heating, lighting, power points add to total
Location: Regional labour rates vary (London generally highest)
For a precise quotation, contact Room Outside for a site survey and design consultation.
5. Thermal Performance: How Warm Are Aluminium Orangeries?
Modern aluminium orangeries are designed to be comfortable year-round, addressing the historic reputation of glass structures being too hot in summer and too cold in winter. Key technologies include:
5.1 Thermal Break Technology
A thermal break is an insulating barrier (typically polyamide) inserted between the interior and exterior aluminium profiles. This prevents thermal bridging – the direct transfer of heat through the metal. Without thermal breaks, aluminium would conduct heat readily; with them, U-values drop dramatically.
5.2 High-Performance Glazing
Aluminium orangeries use sealed double or triple glazed units with:
Low-E coatings: Microscopic metallic layers that reflect heat back into the room while allowing light through
Argon or krypton gas fills: Inert gases between panes provide better insulation than air
Warm edge spacers: Insulating spacer bars reduce heat loss at pane edges
5.3 Solar Control
For south-facing orangeries, solar control glass can be specified. This incorporates coatings that reflect solar infrared radiation, blocking up to 86% of solar heat while maintaining high light transmission. This prevents overheating in summer without darkening the interior.
5.4 Typical U-Values Achieved
Standard double glazing: U-value 1.6 – 1.8 W/m²K
Low-E double glazing with argon: 1.2 – 1.4 W/m²K
Triple glazing with Low-E and argon: 0.8 – 1.0 W/m²K
Building Regulations Part L typically require U-values of 1.6 W/m²K or better for new extensions, so even basic specifications meet standards.
5.5 Ventilation Considerations
To maintain comfort, roof vents or automated opening windows are essential. Building Regulations require adequate ventilation – typically at least 1/20th of floor area as openable area. Modern aluminium orangeries can integrate:
Electric roof vents with rain sensors
Automated window openers linked to thermostats
Manual vents for simple operation
6. Aluminium Orangery Design Options
Aluminium’s versatility enables a wide range of design styles, from ultra-modern to traditional heritage. Here are key design considerations for homeowners in Kent, Surrey, Sussex, Hampshire, and London.
6.1 Lantern Roof Styles
Pyramid lantern: Classic four-sided glazed roof rising to a point, suits traditional and contemporary designs
Ridge lantern: Long, rectangular lantern running the length of the roof, ideal for modern extensions
Multi-pitch lantern: Complex designs with multiple glazed sections for dramatic effect
Flat glass roof: Minimalist option with frameless glazing for ultra-modern look
6.2 Colour Options
Aluminium can be powder-coated in virtually any RAL colour. Popular choices include:
Anthracite grey (RAL 7016): Most popular – sophisticated, modern, architectural
Black (RAL 9005): Dramatic, contemporary, bold
Cream (RAL 9001): Traditional, suits period properties
Green (RAL 6005): Heritage colour for rural settings
Dual-colour option: Different colour inside and out – e.g., white internally for brightness, anthracite externally for kerb appeal.
6.3 Door Integration
Bifold doors: Multiple panels fold and stack, creating wide openings (up to 6-8m spans)
Sliding doors: Panels slide horizontally, space-saving, ideal where swing space limited
French doors: Traditional double doors, outward opening
Pivot doors: Large format doors that pivot open, dramatic entrance statements
All door types can be manufactured in matching aluminium, ensuring cohesive design.
6.4 Base Wall Options
Dwarf walls: 600-900mm high brick/stone walls, providing insulation and traditional appearance
Full-height glazing: Glass from floor to ceiling, maximising views, requires high-performance glazing
Aluminium columns: Structural aluminium posts supporting roof, creating open feel
7. Planning Permission for Aluminium Orangeries
Understanding planning requirements is crucial before starting your project. Most aluminium orangeries fall under Permitted Development rights, but exceptions apply.
7.1 Permitted Development Conditions
Your aluminium orangery may not need planning permission if it meets all these criteria:
Single storey with maximum eaves height of 3m
Maximum height of 4m (if within 2m of boundary, height limited to 3m)
Doesn’t extend beyond the rear wall by more than 3m (semi/terraced) or 4m (detached)
Doesn’t cover more than half the garden area
Materials similar to existing house (aluminium acceptable)
Not forward of principal elevation facing a highway
No verandas, balconies, or raised platforms
7.2 When Planning Permission IS Required
You WILL need planning permission if:
Your property is listed (plus Listed Building Consent required)
You’re in a Conservation Area, National Park, AONB, or World Heritage Site
Previous extensions have used your Permitted Development allowance
You exceed size/height limits
Your property has Article 4 Direction removing PD rights
Building a detached orangery in some circumstances
7.3 Listed Buildings and Conservation Areas
Aluminium can be suitable for listed buildings if designed sensitively. Conservation officers often prefer aluminium for its slim sightlines and clear distinction between old and new. However, you’ll need both Listed Building Consent and planning permission. Heritage colours (cream, green) and traditional proportions help gain approval.
Room Outside has extensive experience with listed property extensions across Sussex, Surrey, and Hampshire.
7.4 Building Regulations
All orangeries must comply with Building Regulations covering:
Part L (Conservation of fuel and power): Thermal performance standards
Part A (Structure): Structural integrity
Part B (Fire safety): Escape routes and fire resistance
Part F (Ventilation): Adequate ventilation
Part K (Protection from falling): Glazing safety
Reputable installers like Room Outside handle Building Regulations approval as part of the service.
8. Aluminium Orangery Installation Process
Understanding the installation timeline helps with planning. Typical projects take 12-20 weeks from deposit to completion.
Stage 1: Initial Consultation (Week 1-2)
Site survey, discuss requirements, budget, and design preferences. Assess planning needs and access constraints.
Stage 2: Design and Quotation (Weeks 3-6)
Detailed designs, 3D visuals, and itemised quotation. Finalise glazing specifications, colours, and door choices.
Stage 3: Planning and Approvals (Weeks 6-12)
Submit planning application if required. Prepare Building Regulations submission. Listed Building Consent applications may take longer.
Stage 4: Manufacture (Weeks 8-14)
Aluminium frames fabricated off-site. Quality control ensures precision.
Stage 5: Groundworks and Foundations (Weeks 10-16)
Excavate foundations, pour concrete, install drainage. Prepare site for frame delivery.
Stage 6: Installation (Weeks 14-18)
Erect aluminium frame, install glazing, fit roof lantern, doors, and windows. Make weathertight.
Stage 7: Finishing (Weeks 16-20)
Internal plastering, electrics, heating, flooring, decoration. Final snagging and handover.
Roof design: Orangeries have solid perimeter roof with glass lantern; glass boxes have fully glazed roof
Privacy: Orangeries offer more privacy due to solid roof sections; glass boxes are fully transparent
Thermal efficiency: Orangeries typically more thermally efficient due to solid roof insulation
Aesthetics: Orangeries feel more architectural; glass boxes more minimalist
Cost: Glass boxes often more expensive due to structural glass requirements
Both can be constructed in aluminium, offering slim frames and durability. The choice depends on desired appearance and performance priorities.
10. Common Myths About Aluminium Orangeries
Myth: “Aluminium orangeries are cold”
Fact: Modern thermally broken aluminium frames achieve U-values as low as 1.2 W/m²K – comparable to solid walls. Combined with high-performance glazing, they’re warm in winter and cool in summer.
Myth: “Aluminium is only for modern homes”
Fact: Aluminium can be powder-coated in heritage colours (cream, green, grey) and designed with traditional proportions, making it suitable for period properties and listed buildings.
Myth: “Aluminium orangeries are too expensive”
Fact: While initial costs are higher than uPVC, the 50+ year lifespan and minimal maintenance make aluminium cost-effective over time. Property value uplift often exceeds the additional investment.
Myth: “Aluminium frames look industrial”
Fact: Modern aluminium profiles are slim and elegant, with smooth powder-coated finishes. They don’t have the industrial appearance of raw aluminium.
Myth: “You can’t get curved aluminium frames”
Fact: Aluminium can be curved during manufacture, enabling bespoke arched windows, curved lanterns, and unique architectural features.
11. Aluminium Orangeries in Your Area
Room Outside serves homeowners across Southern England with aluminium orangery installations. Local considerations:
Aluminium Orangeries Kent
Kent’s mix of Wealden villages, coastal towns, and London commuter belt means diverse property types. We handle everything from modern extensions in Tunbridge Wells to heritage projects in Canterbury.
Aluminium Orangeries Surrey
Surrey’s affluent suburbs and green belt locations demand high-quality finishes. Aluminium orangeries in Guildford, Woking, and Esher often feature anthracite grey frames with bifold doors.
Aluminium Orangeries Sussex (East and West)
From Brighton’s contemporary homes to Chichester’s historic properties, aluminium suits both. We’ve installed orangeries across Sussex with heritage colours for listed buildings.
Aluminium Orangeries Hampshire
Hampshire’s New Forest, Winchester, and Southampton areas require sensitivity to conservation constraints. We navigate planning successfully.
Aluminium Orangeries London
London projects often involve tight sites, listed buildings, and conservation areas. Our experience ensures compliance and beautiful results.
Aluminium Orangeries Berkshire, Dorset, Essex
We also serve Berkshire, Dorset, and parts of Essex, bringing the same expertise and quality.
With over 50 years of experience, Room Outside designs and installs premium aluminium orangeries across Southern England. Our team combines traditional craftsmanship with modern aluminium technology, ensuring beautiful, thermally efficient spaces. We handle everything from initial design through planning to final installation. Contact us for expert advice.
Official sources: UK Planning Portal (planningportal.co.uk) – Permitted Development rights; Historic England – Listed building guidance; Building Regulations 2010 (as amended) – Part L (conservation of fuel and power).
Industry bodies: Glass and Glazing Federation – Thermal performance standards; Council for Aluminium in Building – Technical guidance.
Last updated: May 2026 | Next review: November 2026
📞 01243 538999 – Call anytime. David, our digital assistant, will take a few details so the right specialist can follow up personally.
Ready to Discuss Your Aluminium Orangery?
Whether you’re planning a contemporary extension in London or a heritage orangery in Sussex, our specialists are here to help. Book a free, no-obligation design consultation.
