Bespoke Orangeries
Traditional Elegance, Modern Comfort
Individually designed Orangeries with lantern roofs, solid perimeter insulation and optional brick pillars. A permanent extension that feels like part of your home from day one.
Call us anytime on 01243 538999 – David our digital assistant will take a few details so the right specialist can follow up personally.
What Makes a Room Outside Orangery Different?
An Orangery is a premium glass extension that combines the light‑filled qualities of a conservatory with the structural permanence of a traditional brick extension. The defining feature is a solid insulated perimeter roof with a central glazed lantern, which floods the room with natural overhead light while providing substantially better thermal performance than a fully glazed conservatory roof.
What sets a Room Outside Orangery apart is the level of design and integration. Every project is individually designed around your home’s architecture, with options including brick or rendered pillars, internal pelmet lighting, and premium UPVC, timber or aluminium frames. The result is an extension that feels like a considered part of the original building, not an addition.
We have been designing and installing Orangeries across West Sussex, East Sussex, Surrey, Hampshire, Kent, Essex, Greater London, Berkshire and Dorset since 1973. That experience shapes every aspect of a project, from understanding local planning requirements to recommending the right specification for your property type.
Key Benefits
Why Room Outside?
Four things we do differently that premium homeowners consistently value.
Individual Design, Not Templates
Every Orangery starts with a home visit and a blank sheet. We design around your architecture, your proportions and how you actually want to use the space — not from a catalogue of standard sizes.
Lantern Roof Expertise
The lantern roof is what defines an Orangery. Ours are designed to maximise overhead light while the solid insulated perimeter helps maintain a comfortable temperature throughout the year.
Insured Guarantees
Depending on product and location, we offer up to a 10‑year structural guarantee backed by independent UK insurers. Product‑specific warranties cover glazing, roofing and mechanical components separately.
Planning and Building Expertise
We handle Permitted Development assessments, planning applications where required, and building regulations submissions. Over 50 years of project experience across the South East means we understand what local authorities expect.
Orangery Projects & Inspiration
Recent Orangery projects across West Sussex, East Sussex, Surrey, Hampshire, Kent, Essex, Greater London, Berkshire and Dorset. Click any image to view full size.
Orangery Features and Options
Every Room Outside Orangery is individually designed. Choose from these premium features to create an extension that works exactly the way you need it to.
Lantern Roof
The central glazed lantern is the defining feature of an Orangery, flooding the room with natural overhead light. Ours are individually sized to suit your space and can be specified with New Generation Glass for improved thermal and solar performance.
Solid Perimeter Roof
The insulated perimeter roof sections are what give an Orangery its superior thermal performance and architectural weight. This solid structure helps the extension feel like a permanent, integrated part of your home rather than an addition.
Brick or Rendered Pillars
Optional brick or rendered pillars add structural presence and visual weight. They can be matched to your existing brickwork or finished in a complementary render, reinforcing the sense that the Orangery is part of the original building.
Internal Pelmet Lighting
Concealed lighting within the internal pelmet transforms the room after dark, creating a warm ambient atmosphere. The pelmet also provides a clean transition between the solid perimeter and the central lantern.
New Generation Glass
Available as an option across our Orangery range, New Generation Glass is designed to help block up to 80% of solar heat while maintaining natural light. This can help maintain a comfortable temperature in summer and helps retain warmth during colder months.
Bi-fold and Sliding Doors
Wide‑opening bi‑fold or sliding door systems connect the Orangery seamlessly with your garden. When fully open, they effectively remove the boundary between inside and outside, creating a single flowing living space.
Timber, Aluminium or Premium UPVC?
The material you choose affects how your Orangery looks, how it performs, and what maintenance it will need over the years. Here is an honest comparison to help you choose the right option for your project.
Hardwood Timber
Timber brings natural warmth, depth and craftsmanship – ideal for period properties (Georgian, Victorian, Edwardian, country homes). We use oak, sapele and accoya for structural stability and durability. U‑values as low as 1.2 W/m²K are achievable. Timber can be stained, painted or left natural, and with periodic maintenance (every 5–8 years) it can last 50 years or more.
Aluminium
Aluminium offers the slimmest frames, maximising glass area and sightlines – perfect for modern, contemporary or minimalist properties. Thermally broken profiles achieve U‑values around 1.4 W/m²K. Virtually maintenance‑free, extremely durable, and available in a wide range of powder‑coated RAL colours. Lifespan is typically 45+ years.
Premium UPVC
Modern premium UPVC combines strong thermal efficiency (U‑values as low as 1.2 W/m²K), consistent colour retention and finishes including convincing woodgrain effects. The key advantage is effectively zero maintenance – no repainting or oiling. Expected lifespan is 25–35 years.
A++ Thermal Rating: The year‑round comfort advantage
With the right specification – including solid perimeter insulation, thermally broken frames and New Generation Glass – an Orangery can achieve an A++ thermal rating. This means it can be used comfortably throughout the year with minimal additional heating or cooling. The solid roof sections are key to this performance, reducing heat loss compared to fully glazed alternatives.
Not sure which material suits your property? Our design consultants can advise during a free home visit — there is no obligation.
Bespoke Orangery Cost Guide
Prices vary by size, material and specification. Below are indicative ranges including design, manufacture, groundwork and installation. VAT is included.
| Size / Specification | Premium UPVC | Aluminium | Timber |
|---|---|---|---|
| Small (3m × 4m / 12m²) | £35,000 – £45,000 | £45,000 – £55,000 | £50,000 – £60,000 |
| Medium (4m × 5m / 20m²) | £55,000 – £70,000 | £70,000 – £85,000 | £75,000 – £95,000 |
| Large (5m × 6m / 30m²) | £75,000 – £95,000 | £95,000 – £115,000 | £105,000 – £135,000+ |
All prices include our lantern roof and solid perimeter insulation as standard. Optional brick pillars, pelmet lighting, and upgraded glazing (New Generation Glass) will adjust the final quote. Site‑specific factors such as access, ground conditions and planning requirements may affect the final cost.
Understanding Cost Per Square Metre
Why per‑m² rates decrease with size and what factors influence your final investment.
Economy of Scale in Orangery Pricing
The cost per square metre for a bespoke Orangery decreases as the footprint increases. Fixed costs (design, project management, scaffolding, and foundation preparation) are spread over a larger area. Additionally, the lantern roof does not scale linearly with floor area, meaning the most expensive component represents a smaller proportion of the total cost in larger structures.
The figures above are based on a premium UPVC Orangery with standard glazing. Upgrading to aluminium or timber typically adds 15–30% to the per‑m² rate.
What Impacts Per m² Cost?
- Site Access: Restricted access requiring hand-digging or crane hire can add £1,500–£4,000.
- Ground Conditions: Sloping sites or poor soil increase foundation depth and cost.
- Brick Pillars: Adding structural brick pillars adds £3,000–£8,000 depending on quantity and brick matching.
- Lantern Specification: Upgrading to New Generation Glass or a larger lantern adds 10–15% to glazing costs.
- Planning Conditions: Listed building consent or conservation area requirements may mandate premium materials.
Pro Tip: A 20m² Orangery offers the optimal balance between cost efficiency and spacious living. The per‑m² saving versus a 12m² model often justifies the additional 8m² of floor space.
Orangery vs Conservatory: Which is Right for You?
Both create beautiful light‑filled extensions, but they suit different priorities. This comparison covers the practical differences that matter most.
| Feature | Orangery | Conservatory |
|---|---|---|
| Roof | Solid perimeter with central glazed lantern | Fully glazed — maximum light |
| Thermal | A++ achievable — enhanced insulation potential | A+ rated with New Generation Glass option |
| Price from | £35,000 | £25,000 |
| Build time | 10–14 weeks | 8–12 weeks |
| Feel | More architectural, part of the house | Light, open, garden‑connected |
| Best for | Warmth, solidity and a built‑in feel | Maximum light and garden views |
Not sure? Our design consultants can recommend the best option during a free home visit. Learn more about our conservatories →
Orangery vs Traditional Extension
A traditional brick extension offers a different approach to adding space. Here is how they compare on the things that matter most to homeowners.
| Feature | Orangery | Traditional Extension |
|---|---|---|
| Natural light | Excellent — lantern plus glazed walls | Limited to windows and rooflights |
| Build method | Frame, pillars and lantern on base | Full brick and block construction |
| Architectural feel | Distinctive — light and solid combined | Standard room extension |
| Planning | Often Permitted Development | May require full application |
| Price from | £35,000 | £40,000–£80,000+ |
| Build time | 10–14 weeks | 12–20 weeks |
| Best for | Light‑filled living with solid warmth | A conventional room like a bedroom or utility |
Both options add valuable living space — the right choice depends on how you want the room to feel and how much natural light matters to you. Book a free consultation →
Not sure whether an Orangery is the right choice for your home?
Book a free home consultation. We will visit, take measurements, and show you exactly what is possible — with no obligation.
How a Project Works
From first conversation to finished Orangery, here is what to expect at each stage.
Free Home Design Visit
A specialist visits your home to understand your requirements, assess the site, take measurements and discuss options. There is no obligation and no pressure — this is a genuine consultation, not a sales call.
Bespoke Design
We produce detailed design drawings tailored to your home’s architecture, your preferences and your budget. You will see exactly what the finished Orangery will look like before committing to anything.
Build and Installation
Your Orangery is built using the specified premium materials, then professionally installed on site. We manage the full project from groundworks and base construction through to glazing and finishing.
Handover and Aftercare
We do not consider a project complete until you are fully satisfied. Depending on product and location, your Orangery may be covered by up to a 10‑year insured guarantee, with dedicated aftercare support.
What Our Customers Say
Independently verified reviews from Google. These are real homeowners sharing their experience of working with Room Outside — unedited and in their own words.
“We are absolutely delighted with our experience with Room Outside and cannot recommend them highly enough. Richard Bennett guided us all through the design process with patience, professionalism, and integrity. His design capability is outstanding, and he came up with ideas and solutions that we would never have thought of ourselves. The end result is beyond what my client imagined — a beautiful, high-quality glass extension that has transformed their home and given space they can enjoy all year round. For anyone considering an Orangery, conservatory or glass extension — don’t hesitate. Great to find a company you can truly trust, with decades of experience and a proven record of creating stunning spaces.”
“There are so many conservatory and Orangery companies that it’s difficult to choose the right one. After much research I chose Room Outside, I was not disappointed. From the start of the journey the service and attention was first class. I was kept informed of progress at each critical moment. Very impressed with the New Generation Glass and how well it controls the room temperature in hot weather, fabulous job! Team were great to have around and very polite and tidy. Would definitely recommend to anyone who is looking for a top quality glass room. Thank you Room Outside.”
“Room Outside provided us with a first class level of service throughout. We are so pleased with the installation and love our new room immensely. Things went so well from the first phone call to the day they finished, we couldn’t have asked for more. We will certainly be recommending Room Outside to friends and family. Thanks all.”
Orangery FAQs
Answers to the questions we are asked most often by homeowners considering an Orangery project.
A bespoke Orangery from Room Outside typically costs from £35,000 to £115,000+, depending on size, materials, complexity and site requirements. Smaller 12m² designs start around £55,000, while larger 30m² projects with premium finishes sit toward the higher end. We provide a detailed quotation after a free home visit.
An Orangery has a solid insulated perimeter roof with a central glazed lantern, optional brick pillars and a more permanent architectural feel. A conservatory has a fully glazed roof and walls, offering maximum light but typically less thermal performance. Orangeries generally cost 20–40% more but can feel more like a natural extension of the house. See our conservatories →
Many Orangeries fall under Permitted Development Rights and do not require a formal planning application, provided they meet criteria around size, height and proximity to boundaries. However, rules are different for conservation areas, listed buildings and certain other designations. We check this during the initial home visit and manage any applications that are needed.
Orangeries are generally warmer thanks to their solid insulated perimeter roof, which helps reduce heat loss compared to a fully glazed conservatory roof. With the right specification, an Orangery can achieve an A++ thermal rating. The solid roof sections also help maintain a more even temperature throughout the day.
A typical Orangery project takes 10 to 14 weeks from confirmed order to completion, covering manufacturing, groundworks, frame installation, glazing and finishing. More complex designs or projects that require planning approval may take longer. We set out a clear timeline at the quotation stage so you know exactly what to expect.
Depending on product and location, we offer up to a 10‑year structural guarantee backed by independent UK insurers, alongside separate product‑specific warranties covering glazing, roofing and mechanical components. The exact guarantee terms are confirmed in your quotation before you commit to anything.
With modern double‑glazing and solid perimeter insulation, our Orangeries achieve U‑values as low as 1.2 W/m²K for walls and roof. The solid roof sections significantly reduce heat loss, and with New Generation Glass the space can be used comfortably year‑round with minimal additional heating. An A++ thermal rating is achievable with the right specification.
Timber Orangeries, when properly maintained, can last 50+ years; aluminium structures 45+ years; and premium UPVC 25–35 years. The solid perimeter roof and robust construction contribute to this longevity. Our 10‑year structural guarantee covers the frame and installation, and we provide maintenance guidance to help maximise the lifespan of your Orangery.
Ready to Start Your Project?
Whether you are still exploring ideas or ready to move forward, we have the right next step for you.
Prefer to talk? Call us on 01243 538999 — David our digital assistant will take a few details so the right specialist can follow up personally.
Page reviewed March 2026 · Room Outside Ltd · Est. 1973