How Much Does a Conservatory Cost?
Bespoke prices for uPVC, aluminium, timber, and glass extensions. Full breakdown including groundwork, planning, and hidden fees.
Bespoke Quality vs. Off-the-Shelf Prices
With many homeowners looking to create more space, you might be considering moving or extending your home. A conservatory, orangery, or glass extension can be a quicker and often more cost-effective solution than a full house move. But how much does a conservatory cost in 2026?
There isn’t a fixed price list because many factors affect the final cost. Your investment depends on size, style, materials, and site conditions. While budget off-the-shelf options might appear cheaper, they often exclude crucial groundwork, electrics, and plastering. A high-quality bespoke conservatory, including full construction, typically starts at around £20,000 for uPVC and can exceed £150,000 for a luxury aluminium glass box.
This guide, informed by our 50+ years serving West Sussex and the South East, breaks down every cost factor so you can budget accurately.
Key Factors That Determine Conservatory Cost
When planning your budget, it’s essential to look beyond the base price of the frame and glass. A comprehensive quote should include everything from initial demolition to final decoration. Here are the primary drivers of your final investment:
Size & Footprint Larger square meterage requires more materials and labour, directly increasing the cost. A 4m x 4m room costs significantly more than a 3m x 3m lean-to.
Groundworks & Base The condition of your site matters. Sloping gardens, poor drainage, or the need to remove an old patio can add £3,000 – £8,000+ to the groundwork phase.
Frame Material uPVC is the most cost-effective. Aluminium offers slimmer lines and durability at a premium (30-50% more). Timber commands the highest price for its natural beauty.
Glass Specification Upgrading to solar control glass, self-cleaning coatings, or triple glazing adds to the cost but dramatically improves comfort and energy efficiency.
Material Costs: uPVC vs Aluminium vs Timber
The choice of material is one of the biggest decisions affecting both aesthetics and budget. While uPVC remains the nation’s favourite for affordability, aluminium and timber provide distinct advantages for design and longevity.
| Material | Price Range (4m x 4m) | Lifespan | Pros |
|---|---|---|---|
| uPVC | £22,000 – £35,000 | 20-30 years | Cost-effective, low maintenance, excellent thermal efficiency |
| Aluminium | £32,000 – £55,000 | 45+ years | Slim sightlines, strong, modern aesthetic, recyclable |
| Timber (Hardwood) | £38,000 – £65,000 | 30-60 years (maintained) | Natural beauty, suits period properties, premium feel |
Note: These prices include a solid roof or glass roof system. For a full glass extension cost guide with structural glazing, budgets start higher.
Conservatory Style & Configuration Costs
Complex roof structures and bespoke angles require more engineering and installation time. Here’s how different styles compare for a medium-sized project (approx 16m²):
- Lean-to / Mediterranean: Simplest structure, most affordable. Ideal for bungalows. Est. £18,000 – £28,000
- Victorian / Edwardian: Bay front and ornate ridge details. More complex glazing. Est. £25,000 – £40,000
- P-Shape / L-Shape: Combines two areas (e.g., dining and lounge). Larger footprint and complex roof junction. Est. £35,000 – £60,000+
- Orangery: Brick pillars and a solid roof perimeter with a central glass lantern. Deeper foundations required. Est. £35,000 – £55,000
- Glass Box Extension: Minimalist structural glass. Highest cost due to engineering and specialist installation. Est. £45,000 – £100,000+
Explore our contemporary frameless conservatory range for ultra-modern designs.
Cost Comparison: Conservatory vs Orangery vs Extension
Not sure which type of addition suits your home and budget? The table below outlines typical all-in costs (including construction and finish) for a 20m² addition in the South East.
| Type | Typical Cost (20m²) | Best For |
|---|---|---|
| uPVC Conservatory | £25,000 – £40,000 | Budget-conscious, traditional look, garden room |
| Aluminium Orangery | £45,000 – £70,000 | Luxury kitchen extension, period homes, increased value |
| Glass Box Extension | £60,000 – £120,000 | Architectural statement, seamless indoor-outdoor living |
| Traditional Brick Extension | £50,000 – £90,000 | Permanent additional bedroom or large living space |
A conservatory or orangery from Room Outside offers a faster build time and often avoids the full planning hurdles of a brick extension, providing exceptional value per square metre.
How to Compare Conservatory Quotes Fairly
When comparing quotes from different suppliers, it’s vital to ensure you’re comparing apples to apples. A cheap headline price often hides exclusions that will cost you dearly later.
Site Survey Included? Beware quotes given over the phone without a survey. Ground conditions can add thousands. Room Outside always surveys first.
Glass Specification Ensure quotes specify the U-value and solar control coating. “Standard glass” can lead to an unusable room in summer.
Internal Finishes Plastering, skirting boards, and decorating are often extra. Our quotes include making good to surrounding walls.
Warranty & Guarantee Check the length of the installation guarantee and the manufacturer’s warranty on frames and glass.
Related Cost & Planning Guides
About This Cost Guide
Prices are indicative for bespoke installations in the South East of England as of March 2026. They include design, full construction, 5-star rated installation, and VAT. Costs may vary based on specific site conditions, access, and specification.
Originally published: 27th April, 2021 | Last updated: March 2026
Frequently Asked Conservatory Cost Questions
How much does a basic uPVC conservatory cost in the UK?
A high-quality bespoke uPVC conservatory including groundwork and full installation typically starts from around £20,000 – £25,000. Smaller lean-to designs may start slightly lower, but off-the-shelf ‘budget’ options often exclude crucial costs like foundations, electrics, and plastering, which can add thousands.
What is the difference in cost between a conservatory and an orangery?
Orangeries generally cost 20-40% more than a comparable conservatory due to the increased brickwork, solid roof perimeter, and deeper foundations. A typical 4m x 4m uPVC conservatory might cost £25k, while a similar sized orangery would be closer to £35k-£45k.
Do I need to budget for planning permission?
Many conservatories fall under Permitted Development, meaning no planning application fee is required. However, if you live in a listed building or conservation area, or if the design exceeds size limits, planning fees range from £206 to £462. You should also budget for Building Regulations approval if the conservatory is open-plan to the house or over 30m².
Why are aluminium conservatories more expensive than uPVC?
Aluminium is a premium material with higher raw material costs and more complex manufacturing. It offers slimmer sightlines, greater structural strength for larger spans, and a lifespan of 45+ years with minimal maintenance. Expect to pay 30-50% more for aluminium than for uPVC.
What hidden costs should I look out for in a conservatory quote?
Common hidden costs include: removal of an existing patio/decking, groundworks and foundations (especially on sloping sites), upgrading to solar control glass, electrical work for lighting and sockets, underfloor heating installation, and decorative finishes like plastering and tiling. A comprehensive fixed-price quote from Room Outside includes all of these.
How much value does a conservatory add to a house?
A well-designed, high-quality conservatory can add between 5% and 12% to the value of your property, according to estate agents. A bespoke glass extension that flows seamlessly with the kitchen or living space often provides the highest return on investment.
Call us anytime – David our digital assistant will take a few details so the right specialist can follow up personally.01243 538999
Get a Fixed Price, Not a Guess
With over five decades of experience, we provide detailed, all-inclusive quotes that cover every stage of your build—from foundations to final decoration. No hidden extras.
Book Free Design ConsultationCall us anytime – David our digital assistant will take a few details so the right specialist can follow up personally. 01243 538999
Room Outside: Conservatory & Glass Extension specialists since 1973.
Serving West Sussex, East Sussex, Surrey, Hampshire, Kent, Essex, Greater London, Berkshire & Dorset.
