How Much Does It Cost to Build a Conservatory in 2026? Frame Types, Base Costs and Labour Explained
If you are working with a budget of around £20,000 in 2026, you are typically looking at a mid sized uPVC or entry level aluminium conservatory, fully installed, with standard double glazing, a basic base, and minimal extras. That might suit a family wanting extra dining space or a bright sitting area without committing to a full extension. Push beyond £30,000 and you move into larger footprints, tiled roofs, and higher performance glazing that make the space usable all year round. Understanding exactly what your budget delivers is key to making the right decision.
The cost to build a conservatory in 2026 varies widely across the UK, but most homeowners can expect to pay anywhere from £12,000 to £40,000 depending on size, specification, and site conditions. That range reflects real world differences in frame type, glazing, groundwork, labour, and compliance with current building standards. If you are planning a conservatory, understanding where that money goes will help you avoid overspending and prevent costly mistakes.
This guide breaks down realistic UK costs, what trades actually charge, how frame materials affect price and performance, and what you need to know about planning rules and building regulations.
Average Conservatory Costs in the UK for 2026
At a basic level, conservatory pricing is influenced by size, materials, and complexity of installation. A small lean to with uPVC frames will cost significantly less than a large orangery style conservatory with brick piers and a tiled roof.
| Conservatory Type | Typical Size | Average Cost Range |
|---|---|---|
| Small lean to | 3m x 2.5m | £12,000 to £18,000 |
| Victorian or Edwardian | 3m x 3m | £15,000 to £25,000 |
| Large conservatory | 5m x 4m | £25,000 to £40,000 |
| Orangery style | Varies | £30,000 to £60,000+ |
These figures include supply and installation, but do not always include groundwork complications, bespoke glazing, or high end finishes.
Regional Cost Differences Across the UK
Where you live has a noticeable impact on pricing. Labour rates and access issues drive much of this variation.
- London and South East, expect costs to be 15 to 25 percent higher due to labour demand and access constraints
- Midlands and South West, closer to national averages
- North of England, Wales, and Scotland, often 10 to 20 percent cheaper for labour, though material costs remain similar
For example, a £25,000 conservatory in the Midlands could easily reach £30,000 in London for the same specification.
Supply Only vs Supply and Fit Pricing
Some companies advertise supply only prices, which can seem significantly cheaper at first glance.
- Supply only conservatory kits, £5,000 to £15,000
- Installation labour separately, £5,000 to £15,000 depending on complexity
For most homeowners, a full supply and fit package offers better value and accountability, especially where guarantees and compliance certification are involved.
For a broader breakdown of value and how conservatories compare to other home improvements, see Understanding Conservatory Costs and Value for UK Homes.
Breakdown of Conservatory Costs
A conservatory is a combination of several building elements. Understanding each part helps you control the budget.
Detailed Cost Breakdown Table
| Cost Element | Typical Price Range | Notes |
|---|---|---|
| Groundworks and foundations | £3,000 to £8,000 | Varies with soil conditions and access |
| Frame and structure | £5,000 to £30,000+ | Depends on material and size |
| Glazing and upgrades | £1,000 to £5,000 | Triple glazing and solar control cost more |
| Roof system | £1,000 to £15,000 | Polycarbonate cheapest, tiled highest |
| Labour | £5,000 to £12,000 | Typically 25 to 40 percent of total cost |
| Electrics and heating | £500 to £3,000 | Lighting, sockets, underfloor heating |
| Optional extras | £1,000 to £10,000+ | Bi fold doors, bespoke finishes, blinds |
1. Foundations and Base
The base is often underestimated. In most cases, contractors will install a trench foundation with concrete footings, followed by a dwarf wall and slab.
- Simple base, flat ground: £3,000 to £5,000
- Complex ground conditions or drainage: £5,000 to £8,000+
Clay soil, trees nearby, or poor drainage can all increase costs. In some cases, deeper foundations are required to meet building control expectations.
2. Frame and Structure
This is the biggest cost driver and where your choices matter most.
- uPVC: £5,000 to £15,000
- Aluminium: £10,000 to £20,000
- Timber: £15,000 to £30,000+
The frame price includes installation but not always glazing upgrades.
3. Glazing
Most modern conservatories use double glazing as standard, but higher performance glass is increasingly common.
- Standard double glazing: included in most base quotes
- Solar control or self cleaning glass: add £1,000 to £3,000
- Triple glazing: add £2,000 to £5,000
Energy performance is worth investing in. Poor glazing leads to overheating in summer and cold interiors in winter, often resulting in additional heating costs of several hundred pounds per year.
4. Roof Options
The roof you choose dramatically affects comfort and price.
- Polycarbonate: cheapest, £1,000 to £3,000
- Glass roof: £3,000 to £8,000
- Tiled warm roof: £6,000 to £15,000
Tiled roofs are now popular because they improve insulation and make the space usable year round.
5. Labour Costs
Labour typically accounts for 25 to 40 percent of the overall build cost.
- General builder: £150 to £250 per day
- Specialist conservatory installers: often included in supply package
- Electrician or plumber: £200 to £350 per day
Expect a full conservatory installation to take between 2 and 4 weeks depending on complexity.
Frame Types Explained
The frame material affects not just cost, but durability, maintenance, and thermal performance.
uPVC Conservatories
This is the most common option in the UK due to affordability.
- Pros: low cost, low maintenance, quick installation
- Cons: less durable over time, limited colour range, can look dated
Best suited for smaller conservatories and tighter budgets.
Aluminium Conservatories
Aluminium has become very popular for modern homes.
- Pros: slim frames, strong, modern appearance, long lifespan
- Cons: higher upfront cost
Thermal breaks in modern aluminium systems mean energy efficiency is much improved compared to older designs.
Timber Conservatories
Timber offers a traditional, high end finish.
- Pros: excellent aesthetics, strong insulation performance
- Cons: expensive, ongoing maintenance required
Often chosen for period properties where planning sensitivity matters.
Cost to Build a Conservatory in 2026 by Specification Level
Looking at real world scenarios helps put budgets into context.
- Budget build, £12,000 to £18,000, small uPVC lean to, polycarbonate roof, basic glazing, minimal groundwork
- Mid range build, £18,000 to £30,000, larger footprint, aluminium or upgraded uPVC, glass roof, improved insulation
- High end build, £30,000 to £60,000+, orangery style, tiled roof, bespoke glazing, integrated electrics and heating
The difference is not just size. It is how the space performs day to day.
Planning Permission and Building Regulations
Most conservatories fall under permitted development rights, meaning planning permission is not required. However, there are limits on size, height, and proximity to boundaries.
You can check current rules on the UK Government planning portal here: https://www.planningportal.co.uk/permission/common-projects/conservatories/planning-permission.
Permitted Development Limits Explained
- Must not extend beyond the rear wall by more than 3 metres for attached houses without prior approval
- Maximum height typically 4 metres
- Cannot cover more than 50 percent of the land around the original house
Properties in conservation areas or listed buildings often require full planning permission regardless of size.
Building Regulations and Compliance Bodies
For building regulations, conservatories are often exempt if they meet certain conditions:
- Less than 30 square metres
- Separated from the house by external doors
- Independent heating system
Once you remove doors or integrate heating with the main system, full building regulations approval usually applies.
Key regulations and standards include:
- Part L, energy efficiency requirements for glazing and insulation
- Part F, ventilation requirements to prevent condensation and overheating
- FENSA or CERTASS certification for window and door installations
- NICEIC registered electricians for any electrical work
- HSE guidelines for safe construction practices on site
Relevant standards can be found via the UK Government guidance: https://www.gov.uk/building-regulations-approval.
How Conservatories Compare to Extensions
A conservatory is generally cheaper than a traditional extension, but also offers less insulation and flexibility.
| Feature | Conservatory | Extension |
|---|---|---|
| Cost per square metre | £800 to £2,000 | £1,800 to £3,000 |
| Insulation | Moderate to low unless upgraded | High standard |
| Year round usability | Variable | Consistent |
| Planning requirements | Often permitted development | More likely to require approval |
| Lifespan | 20 to 30 years | 40 years+ |
For comparison, a single storey extension typically costs £1,800 to £3,000 per square metre in 2026. You can explore this further in How Much Does It Cost to Build a Single Storey Extension in the UK in 2026? Cost Per Metre, Foundations and Finishing Costs Explained.
If you are weighing up options, also see Extension cost breakdown and planning advice for UK homes.
Many homeowners now start with a conservatory and later upgrade it into a full extension. Costs for that process are explained here: How Much Does It Cost to Convert a Conservatory into a Proper Extension in the UK in 2026? Insulation, Foundations, Glazing and Building Control Fees Explained.
Ongoing Maintenance and Long Term Costs
Beyond the initial build, conservatories come with ongoing ownership costs.
- Cleaning glass and frames, £100 to £300 per year if using a service
- Heating costs, often higher than standard rooms without proper insulation
- Seal and gasket replacements, £200 to £800 over time
- Roof panel replacements for older polycarbonate systems
Higher quality materials reduce these long term costs significantly.
Common Mistakes to Avoid
Even well planned projects can run into trouble if the basics are overlooked.
- Underestimating groundwork complexity. Fixing failed foundations can cost £5,000 to £15,000 if underpinning is required
- Choosing cheap glazing. Retrofitting better glass later can cost £2,000 to £6,000
- Ignoring ventilation. Poor airflow often leads to condensation issues and mould removal costs
- Not planning electrics early. Retrofitting sockets and lighting can double installation costs
- Assuming exemption from regulations. Non compliant work may need removal or costly alterations
Cutting corners on structure or insulation usually costs more to fix later.
Practical Checklist Before You Start
- Measure available space and check boundary distances
- Confirm planning permission status
- Check soil type and drainage conditions
- Arrange a basic site survey if ground conditions are unknown
- Decide on frame type and roof system
- Set thermal efficiency targets for glazing and insulation
- Plan electrics, lighting, and heating early
- Verify installer warranties and guarantees
- Set a realistic budget with contingency of at least 10 percent
- Get at least three quotes from reputable installers
- Check installer credentials and reviews
- Agree a written contract with clear scope of work
Typical Project Timeline
A standard conservatory project follows a predictable sequence, but delays can occur depending on weather, approvals, and material lead times.
- Design and quotation, 2 to 4 weeks, includes surveys and drawings
- Planning approval if required, up to 8 weeks
- Groundworks and base, 1 to 2 weeks, includes excavation, concrete pour, and curing time
- Frame installation, 3 to 5 days, typically completed quickly once materials arrive
- Roof installation and glazing, a few days depending on system
- Finishing and electrics, 1 to 2 weeks, includes plastering, wiring, and flooring
- Final checks and certification, including FENSA and electrical sign off
Common delays include bad weather affecting groundworks, late delivery of bespoke frames, and unexpected site conditions.
FAQs
How long does a conservatory last?
A well built conservatory with quality materials should last 20 to 30 years. Aluminium and timber frames tend to outlast uPVC, especially with proper maintenance.
Do I need a structural engineer?
For standard conservatories, not usually. However, if you are removing walls or integrating the structure with the main house, structural calculations may be required to meet building regulations.
Can I use a conservatory all year round?
Yes, but only with proper insulation, high performance glazing and a suitable heating solution. Older polycarbonate roof designs are rarely comfortable in winter.
Is a tiled roof worth the extra cost?
In most cases, yes. A tiled warm roof significantly improves energy efficiency and makes the space feel like a true extension rather than a seasonal room.
Will a conservatory add value to my home?
It can, typically adding 5 to 7 percent in value if well designed and integrated. Poor quality conservatories can do the opposite, so build quality matters.
Do I need building control approval for a conservatory?
Not always. If the conservatory meets exemption criteria such as being under 30 square metres and separated from the main house, formal approval may not be required. If those conditions are not met, building control approval is mandatory.
What is the cheapest type of conservatory to build in the UK?
A small uPVC lean to with a polycarbonate roof is typically the cheapest option. These can start from around £12,000, but they offer limited insulation and shorter lifespan compared to higher specification builds.
Final Thoughts
A conservatory remains one of the most accessible ways to add space to a home, but costs in 2026 reflect higher material prices, stricter standards, and increased labour rates. The key to getting value is balancing budget with long term performance. Cheap installations often lead to expensive upgrades later.
Take the time to compare options, understand the full cost breakdown, and work with experienced tradespeople who know UK regulations and site realities.
If you are ready to get started, the simplest way to find trusted local professionals is to post a job on BookaBuilderUK and receive free quotes from vetted tradespeople in your area.
