How Much Does a Conservatory Roof Replacement Cost in 2026?
Most UK homeowners pay between £4,000 and £8,000for a lightweight tiled conservatory roof replacement. A new polycarbonate roof starts from around £1,500, while a full solid roof conversion on a large conservatory can reach £12,000 or more.
£6,000
Average cost (tiled)
£1,500
Polycarbonate from
£12,000+
Full solid roof
3–5 days
Installation time
Prices updated April 2026 · Based on industry data and contractor submissions.
Building regulations are required for solid roof conversions.Replacing a glazed or polycarbonate conservatory roof with a solid or tiled roof changes the structure from a conservatory to an extension under building regulations. Your installer should handle the application, but always confirm it is included in the quote. Budget £300–£700 for the application if charged separately.
Why Replace Your Conservatory Roof?
If your conservatory sits empty for half the year because it is too hot in summer and freezing in winter, a roof replacement could be the single best investment you make in your home.
Old polycarbonate roofs deteriorate
Polycarbonate panels discolour over time, turning yellow or cloudy. They become brittle after 10–15 years and can crack or leak. The noise during heavy rain makes the room almost unusable, and the thermal performance is poor from day one.
Temperature swings make the room unusable
A conservatory with a polycarbonate or single-glazed roof can swing by 15°C or more between morning and afternoon in summer. In winter, heat escapes so quickly that the radiators cannot keep up. A solid or tiled roof stabilises the temperature to match the rest of your house.
Energy bills are higher than they need to be
A poorly insulated conservatory roof lets heat pour out in winter, forcing your boiler to work harder. Replacing the roof with a properly insulated system (U-value 0.15–0.18) can cut your heating bills by £200–£400 a year and may improve your EPC rating.
A solid roof transforms the space
Upgrading to a tiled or solid roof turns a conservatory from a seasonal bolt-on into a genuine year-round living space. Many homeowners use the room as a dining room, home office, or playroom once the roof is sorted. It changes the way you use your home.
Conservatory Roof Replacement Prices by Type
Prices below are for a medium-sized conservatory (10–15m²) and include removal of the old roof, the new roof system, insulation, and basic internal finishing.
New polycarbonate roof
Replace damaged or yellowed polycarbonate panels with modern multiwall or solid polycarbonate
£2,250
£1,500 – £3,000
Glass roof replacement
Self-cleaning, solar-control double-glazed units for maximum light
£4,500
£3,000 – £6,000
Lightweight tiled roof
Guardian, Supalite, or similar — real tiles on a lightweight frame
£6,000
£4,000 – £8,000
Full solid roof conversion
Fully insulated solid roof with plastered ceiling, built to building regs
£8,500
£5,000 – £12,000
Insulated panels (e.g. Leka)
Composite insulated panels — quick installation, excellent U-values
£6,750
£4,500 – £9,000
Roof Replacement Costs by Conservatory Size
The size of your conservatory has the biggest impact on the final price. Here is what to expect for the three main roof types at each size.
| Size | Polycarbonate | Glass | Tiled |
|---|---|---|---|
| Small (up to 10m²) | £1,500 – £2,500 | £3,000 – £4,500 | £2,500 – £5,000 |
| Medium (10–15m²) | £2,000 – £3,000 | £4,000 – £5,500 | £4,000 – £8,000 |
| Large (15–20m²) | £2,500 – £3,500 | £5,000 – £6,500 | £6,000 – £10,000 |
| Extra large (20m²+) | £3,000+ | £6,000+ | £8,000 – £12,000+ |
All prices include removal of old roof, new roof system, insulation, and basic internal finishing. Internal plastering and downlights may be additional.
Popular Conservatory Roof Systems Compared
These are the four most widely installed lightweight roof systems in the UK. All are specifically designed to replace existing conservatory roofs without needing structural changes to the frame.
Guardian Warm Roof
The most well-known lightweight tiled system in the UK. Full building regulations compliance, wide range of tile colours, and a solid track record.
U-value
0.15–0.18
Install
4–5 days
Supalite
Very similar to Guardian in performance and appearance. Competitive pricing and widely available through approved installers across the UK.
U-value
0.15–0.18
Install
4–5 days
Leka
Insulated composite panels rather than traditional tiles. Quicker to install and extremely lightweight. Modern, clean finish.
U-value
0.15
Install
2–3 days
Ultraroof (Ultraframe)
A hybrid system combining solid panels with glass sections. Lets in more natural light than a fully tiled roof while still offering good insulation.
U-value
0.16–0.18
Install
3–4 days
For comparison: A standard polycarbonate roof has a U-value of 1.2–1.6, and a double-glazed glass roof sits around 1.0. The lightweight tiled systems achieve 0.15–0.18 — roughly 7 to 10 times better insulation performance.
What’s Included in a Roof Replacement Quote?
A reputable installer should include all of the following in their quote. If anything is missing, ask about it before you sign.
| Item | Typical Cost |
|---|---|
| Removal and disposal of old roof | £500 – £1,000 |
| New roof structure and framework | Varies by system |
| Insulation | Included |
| Internal plastering and ceiling finish | £800 – £1,500 |
| Guttering and fascias | £300 – £600 |
| Building regulations certificate | £300 – £700 |
| Downlights (optional) | £300 – £600 |
Planning Permission & Building Regulations
The rules around conservatory roof replacements depend on what you are replacing your existing roof with.
Like-for-like replacement (no planning needed)
Replacing polycarbonate with polycarbonate, or glass with glass, is treated as a repair. No planning permission and no building regulations approval needed. Simply get on with the work.
Converting to solid or tiled roof
This is technically a material change to the structure. Most councils do not require planning permission for lightweight tiled systems because they are specifically engineered to comply with existing conservatory dimensions. However, building regulations approval is always required because the conservatory effectively becomes an extension once it has a solid roof.
Lightweight systems are designed to avoid planning issues
Guardian, Supalite, Leka, and Ultraroof are all engineered to sit within existing conservatory dimensions and weight limits. They do not increase the height or footprint of the conservatory, which is why planning permission is almost never needed. Your installer will confirm this during the survey.
Structural assessment is always carried out
Before any tiled or solid roof conversion, a reputable installer will carry out a structural assessment to confirm your existing frame and foundations can support the new roof. Lightweight systems weigh far less than traditional tiles, so this is rarely a problem, but it needs to be checked and documented for building regulations.
Always check with your local council. While the general guidance above applies in most cases, some councils have stricter interpretations. If your property is in a conservation area or is a listed building, you should seek specific advice before starting any work.
What Affects the Cost of a Roof Replacement?
Size of your conservatory
This is the single biggest factor. A small conservatory (under 10m²) might cost £2,500–£5,000 for a tiled roof, while an extra-large one (over 20m²) can reach £8,000–£12,000. The roof area determines how much material is needed and how long the installation takes.
Type of replacement roof
A new polycarbonate roof is the cheapest option at £1,500–£3,000. Glass costs roughly double that. Lightweight tiled systems from Guardian or Supalite run £4,000–£8,000 for most sizes, and a full solid roof conversion with all the trimmings can reach £12,000.
Condition of your existing frame
If your conservatory frame is in good condition, the installer works with what is already there. If the frame is rotten, warped, or structurally compromised, it may need reinforcement or partial replacement before the new roof can go on. This can add £500–£2,000 to the total.
Internal finishing standard
A basic plasterboard ceiling is the standard finish. If you want a higher specification — smooth plastered finish, recessed LED downlights, coving, or a vaulted ceiling effect — expect to pay more. Downlights alone add £300–£600, and a full plaster and paint finish adds £800–£1,500.
Scaffolding and access
Most conservatory roof replacements can be done from ladders or a low scaffold. If your conservatory is two-storey, difficult to access, or surrounded by obstacles, scaffolding costs will be higher. Budget £400–£800 for scaffolding if needed.
Disposal of old materials
Removing and disposing of the old roof panels, framework, and any damaged insulation typically costs £500–£1,000. Most installers include this in the quote, but it is worth checking. Some charge separately for skip hire.
Before and After: What a New Roof Actually Changes
The difference a roof replacement makes is dramatic. Here is what homeowners consistently report after upgrading from a polycarbonate or old glass roof to a modern tiled or solid system.
| Factor | Before | After |
|---|---|---|
| Temperature | ±15°C daily swings | Stable room temperature |
| Rain noise | Deafening on polycarbonate | Up to 90% quieter |
| Heating bills | Heat escapes rapidly | £200–£400/year saving |
| Usability | Seasonal — too hot/cold | Year-round living space |
| Property value | Discounted by buyers | +£5,000–£10,000 |
Bottom line: A conservatory roof replacement is not just a repair — it is a transformation. The room goes from something you tolerate to something you actually use every day. Most homeowners say it is the best money they have spent on their home.
Roof Replacement Costs by Region
Average prices for a lightweight tiled roof replacement on a medium-sized conservatory (10–15m²), fully installed, by UK region.
| Region | Average Cost | vs National |
|---|---|---|
| London | £7,800 | +30% |
| South East | £6,800 | +13% |
| East of England | £6,400 | +7% |
| South West | £6,200 | +3% |
| Midlands | £6,000 | Average |
| Yorkshire | £5,400 | -10% |
| North West | £5,600 | -7% |
| North East | £5,000 | -17% |
| Scotland | £5,200 | -13% |
| Wales | £5,200 | -13% |
Based on industry data. Prices for a lightweight tiled roof replacement on a medium conservatory (10–15m²), fully installed.
How to Get Your Roof Replacement for Less
Conservatory roof replacements are a competitive market, and there are several ways to bring the cost down without compromising on quality.
Get quotes from roof replacement specialists, not general builders
Conservatory roof replacement is a specialist trade. Companies that focus on it have approved installer status with Guardian, Supalite, or Leka, which means they know the systems inside out and can offer manufacturer-backed warranties. A general builder may be cheaper on paper but is far more likely to run into problems with fitting, flashing, and building regulations.
Consider replacing only the panels if your frame is in good condition
If the aluminium or uPVC frame of your conservatory roof is structurally sound, you may not need a full roof replacement. Simply swapping out old polycarbonate panels for new ones, or upgrading to glass panels within the existing frame, costs significantly less than a complete tiled roof conversion. Get a specialist to assess the frame before committing to a full replacement.
Lightweight tiled systems avoid costly structural upgrades
One of the biggest advantages of systems like Guardian and Supalite is that they are engineered to work with existing conservatory frames. They weigh far less than traditional tiles, which means your current frame almost certainly will not need reinforcement. This saves thousands compared to a conventional solid roof that would require structural upgrades to the walls and foundations.
Check whether building regs are included in the quote
Building regulations approval is required for any solid roof conversion. Some installers include the application and inspection fees in their quote, others charge it as an extra. This can add £300–£700 to the total cost, so make sure you know upfront. A good installer will handle the entire process for you.
Book your installation for winter for potentially lower prices
Conservatory roof replacement specialists are busiest in spring and summer when homeowners are thinking about their conservatories. If you can wait until autumn or winter, you may find installers more willing to negotiate on price. The work itself is not weather-dependent once the old roof is off — a new roof can go on in any conditions.
Check ECO4 eligibility for potential energy efficiency grants
Some conservatory roof replacements may qualify for funding under the ECO4 scheme if you are on certain benefits or have a low household income. A solid roof significantly improves the thermal performance of your home, which is exactly what these grants are designed to support. It is worth checking your eligibility before paying out of pocket — you could save thousands.
What to Expect: The Roof Replacement Process
A typical conservatory roof replacement takes 3–5 working days. Here is the usual sequence from start to handover.
- 1
Survey and structural assessment
The installer visits to measure your conservatory, assess the condition of the existing frame, and confirm what type of replacement roof is suitable. They will check whether your foundations and walls can support the new roof (they almost always can with lightweight systems). You will receive a detailed written quote.
- 2
Removal of old roof (day 1)
The old polycarbonate or glass panels are carefully removed, along with the existing roof bars and ridge. The room is sheeted over temporarily to protect it from the weather while the new framework goes up. The old materials are loaded into a skip for disposal.
- 3
New roof framework (days 1–2)
The new aluminium or timber sub-frame is assembled on top of the existing conservatory walls. This framework is what gives the roof its shape — a low-pitch design for tiled systems, or the same pitch for glass replacements. It is bolted securely to the existing structure.
- 4
Insulation and roof covering (days 2–3)
Insulation boards are fitted between and over the rafters. For tiled systems, battens are laid and the lightweight tiles are fixed in place. For glass, the new double-glazed units are fitted. Lead flashing is dressed into the house wall to create a watertight seal.
- 5
Internal finishing (days 3–5)
Plasterboard is fitted to the underside of the new roof structure, then skimmed and painted to create a proper plastered ceiling. Downlights are wired in if requested. New guttering and fascias are fitted externally. The installer does a final clean-up and walks you through the completed work.
Official Resources
Trusted sources for further reading and professional guidance.
Planning Portal: Conservatory planning rules
Check whether your conservatory roof replacement needs planning permission — most do not.
Gov.uk: Building Regulations approval
A solid conservatory roof typically triggers Building Regulations. This page explains the approval process.
NFRC: National Federation of Roofing Contractors
Find an NFRC-accredited contractor for your conservatory roof replacement.
Frequently Asked Questions
How much does it cost to replace a conservatory roof with tiles?
A lightweight tiled conservatory roof replacement typically costs between £4,000 and £12,000 depending on the size of your conservatory. A small conservatory (up to 10m²) costs around £4,000–£6,000, a medium one (10–15m²) runs £5,500–£8,000, and a large conservatory (15–20m²) can reach £8,000–£12,000. These prices include removal of the old roof, the new tiled system, insulation, internal plastering, and building regulations certification.
Do I need planning permission to change my conservatory roof?
In most cases, you do not need planning permission to replace a conservatory roof. Replacing like-for-like (polycarbonate to polycarbonate, or glass to glass) is a straightforward repair. Converting to a solid or tiled roof is technically a material change, but the lightweight tile systems from Guardian, Supalite, and Leka are specifically engineered to avoid the need for planning permission. However, building regulations approval is always required for solid roof conversions. Check with your local council if you are unsure.
How long does a conservatory roof replacement take?
Most conservatory roof replacements take 3–5 working days from start to finish. A straightforward polycarbonate or glass replacement can be done in 2–3 days. A tiled or solid roof conversion takes 4–5 days because it involves more structural work and internal finishing such as plastering and fitting downlights. The work is largely done from the outside, so disruption to your home is minimal.
Is it worth replacing a conservatory roof?
Yes, replacing a conservatory roof is one of the most worthwhile home improvements you can make. A solid or tiled roof transforms a conservatory from a seasonal space into a room you can use comfortably all year round. You can expect to save £200–£400 per year on heating bills, reduce rain noise by up to 90%, and add £5,000–£10,000 to your property value. Most homeowners say they wish they had done it sooner.
Can my conservatory frame support a tiled roof?
In most cases, yes. Lightweight tiled roof systems such as Guardian Warm Roof, Supalite, and Leka are specifically designed to work with existing conservatory frames without needing structural reinforcement. They weigh significantly less than traditional tiles. A reputable installer will carry out a structural assessment as part of the quotation process to confirm your frame is suitable. Very old or damaged frames may need some reinforcement work.
Will a new conservatory roof reduce my energy bills?
Yes, significantly. A solid or tiled conservatory roof typically achieves a U-value of 0.15–0.18, compared to 1.2–1.6 for polycarbonate and around 1.0 for standard double-glazed glass. This means far less heat escapes in winter and far less heat enters in summer. Most homeowners report saving £200–£400 per year on heating bills after a roof replacement. It may also improve your EPC rating.
What is the best conservatory roof replacement?
Guardian Warm Roof and Supalite are the two most popular lightweight tiled systems in the UK. Both offer excellent thermal performance, full building regulations compliance, and a range of tile colours and finishes. Leka is another strong option that uses insulated composite panels for quicker installation. The best choice depends on your budget, aesthetic preference, and whether you want a traditional tiled look or a more contemporary finish.
Does a new conservatory roof add value to your house?
Yes. A well-converted conservatory roof typically adds £5,000–£10,000 to your property value, sometimes more. Estate agents report that a conservatory with a solid roof is valued as additional living space, whereas one with a polycarbonate roof is often discounted by buyers because of its poor thermal performance. The investment usually pays for itself when you come to sell.
Written by Sarah Mitchell, Less.co.uk home improvement specialist
Last updated: · Pricing based on industry data and verified contractor submissions · Methodology
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