Replacing a conservatory roof with insulated aluminium panels costs from £3,000 for a small roof, from £4,000 for a medium one and from £5,000 for a large or P-shaped conservatory. Most homes pay £3,000 to £7,500, about £250 to £450 per m² of roof, fitted, with the old roof taken away and building control included.
Insulated conservatory roof panel prices by size
We price by the area of the roof, not the floor, because the roof is what we make and fit. The three bands below cover almost every conservatory we survey. Each price is fitted and includes taking your old roof away.
0 to 12 m²Small conservatory
from£3,000
- Examplea 3 m by 3 m lean-to
- Typical price£3,200 to £3,800
- Fitting time1 day
- Guarantee10 years, insurance backed
12 to 25 m²Medium conservatory
from£4,000
- Examplea 4 m by 4 m Edwardian
- Typical price£4,200 to £4,950
- Fitting time1 to 2 days
- Guarantee10 years, insurance backed
25 m² and overLarge conservatory
from£5,000
- Examplea 6 m wide P-shape
- Typical price£5,800 to £6,850
- Fitting time2 to 3 days
- Guarantee10 years, insurance backed
A small roof is anything up to 12 m², which covers most lean-tos and compact Edwardians. Medium runs from 12 to 25 m² and takes in most Victorians and larger Edwardians. Large means 25 m² and over, which is where P-shapes and wide gable ends usually sit.
Roof area is always a little bigger than floor area, because the roof is pitched and overhangs the frame. A conservatory that measures 3 m by 3 m on the floor usually has a little over 9 m² of roof, so it sits in the small band.
Prices by conservatory style
Style changes the price because every extra facet means more cuts, more hip bars and more sealing. A lean-to is the simplest shape and the cheapest per m². Against a lean-to of the same roof area, an Edwardian costs about 6% more and a Victorian about 10% more.
A gable end costs about 12% more than a lean-to, because the tall front triangle needs its own trims. A P-shape costs about 16% more, since it joins two roofs at a valley and has the most junctions to seal.
| Style | Small (0 to 12 m²) | Medium (12 to 25 m²) | Large (25 m² and over) |
|---|---|---|---|
| Lean-to | £3,000 to £3,550 | £3,950 to £4,700 | £5,450 to £6,450 |
| Edwardian | £3,200 to £3,800 | £4,200 to £4,950 | £5,800 to £6,850 |
| Victorian | £3,300 to £3,900 | £4,350 to £5,150 | £6,000 to £7,100 |
| Gable end | £3,350 to £4,000 | £4,450 to £5,250 | £6,100 to £7,250 |
| P-Shape | £3,500 to £4,150 | £4,600 to £5,450 | £6,300 to £7,500 |
These are starting prices for a typical size in each style. Your own quote is worked out from your measurements, so it can land above or below the row for your style. Each style has its own page, for example Victorian conservatory roof panels.
What the price includes
Every quote we write is fitted and fixed. There are no separate lines for the survey, the waste or the building control paperwork.
- A free survey: a visit to measure the roof, check the frame and glazing bars, and take the photos we use to make your panels.
- Removal of the old roof: polycarbonate sheets or glass units taken down, carried away and recycled.
- Made to measure panels: 75 mm insulated aluminium panels, made in the UK, in your choice of colour outside and white inside.
- Fitting: panels fixed and sealed into your existing frame, with new trims and flashing where the roof meets the house wall.
- Building control: we agree the specification with building control before we order, make the application and pay the fee.
- Clearing up: dust sheets down before we start, everything swept, hoovered and taken away when we finish.
- A guarantee: our 10 year insurance backed guarantee on the panels and the work.
Extras and what they cost
Most roofs need nothing extra. The three add-ons below are the ones people ask for most, and each has a fixed price whatever the size of your roof.
| Extra | Price | Why people add it |
|---|---|---|
| Glazed roof light | £395 each | Keeps a patch of sky and daylight over the room |
| LED spotlights | £345 | Lighting set into the new ceiling for dark evenings |
| New gutters and fascia | £295 | Replaces tired or dripping guttering while we have easy access |
Most people choose one or two roof lights. On a small lean-to one is usually plenty, while a large Victorian or P-shape often has two so the light spreads more evenly. The conservatory roof lights page shows the sizes and where they can go.
What pushes the price up or down
Two roofs with the same floor area can have quite different quotes. These are the six things that make the difference, in rough order of how much they matter.
Style
Style sets the starting point, as shown above. A lean-to has one flat slope and few joins, while a P-shape has two roofs, a valley and far more edges. The more junctions there are, the longer the fit and the more sealing and trim we use.
Size
Bigger roofs cost more in total but usually less per m², because the time spent setting up, stripping out and clearing away is shared across more panels. That is why a large roof can sit near £250 per m² while a very small one is closer to £450.
Access
Most single storey conservatory roofs need no scaffold at all. The price goes up a little when access is awkward, for example a roof reached only through a narrow side passage, a conservatory above a steep drop or one we can only reach from a neighbour's garden. The surveyor checks this on the day and it is written into your quote.
Frame repairs
Our panels are light enough for most existing uPVC and aluminium frames. If the surveyor finds a cracked glazing bar, a sagging ridge or a dwarf wall that has moved, it has to be put right before the new roof goes on. Any repair is priced separately in the quote, so you see it before you agree to anything.
Very occasionally a frame is too far gone to take any new roof. In that case the honest answer is a full replacement roof with a new frame, which is not work we do, and we will tell you so at the survey rather than sell you panels that will not last. Our guide on whether your frame can take a solid roof explains what we look for.
Colour
Anthracite grey and white are the most popular outside finishes, and the inside is always white. Panels can be made in any RAL colour, and your quote shows if the colour you pick changes the price. Bring any colour samples you like to the survey and we will match them.
Building control fee
Fitting a solid insulated roof normally means the conservatory is no longer exempt from building regulations, so the roof needs building control approval. Each council sets its own fees and they differ from one area to the next. We include the application and your council's fee in the quote, so the only effect is that the same roof can cost slightly more in one town than another.
Panels compared with polycarbonate, glass and internal insulation
Here is how the four main choices compare for a conservatory that measures 3 m by 3 m. The U-value shows how fast heat escapes through the roof, and lower is better.
| Option | Typical fitted cost | U-value (W/m²K) | What you end up with |
|---|---|---|---|
| New polycarbonate sheets | £2,000 to £3,500 | 1.4 to 2.3 | A new version of the same roof, still cold in winter, hot in summer and loud in rain |
| Replacement glass roof | £3,300 to £5,200 (£350 to £550 per m²) | 1.0 to 1.2 | Warmer than old glass, but still lets direct sun in on summer afternoons |
| Internal insulation under the old roof | £1,000 to £3,200 (about £2,850 on average) | Depends on the system | The old roof stays in place above a new ceiling, with its age and any leaks |
| Insulated panels | From £3,000 | About 0.43 | Old roof gone, a warm and quiet room that stays usable all year |
New polycarbonate is the cheapest roof to buy, but 16 mm sheets lose heat about five times as fast as a 75 mm panel. It suits a conservatory you only use in spring and autumn, and not much else. Our page on how to replace a polycarbonate conservatory roof goes through the choice in more detail.
Modern low-e glass is a real improvement on a pre-2002 glass roof at about 2.8, and it keeps the view of the sky. For the same area it usually costs more than panels, and it does nothing to stop the room reaching 35 to 40°C on a sunny July afternoon.
Internal insulation is the lowest cost way to make the room warmer, but it hides the old roof rather than replacing it. Ageing sheets and failed seals are still up there, and warm moist air can reach the cold old roof and condense in the gap if the job is not done carefully. The conservatory roof insulation page compares the two approaches side by side.
Running cost savings: a worked example
Heat loss through a roof is U-value times area times the temperature difference. Take a 12 m² roof with 20°C inside and 0°C outside. A 16 mm polycarbonate roof at 2.3 loses about 552 W, which is roughly what a small electric heater gives out. The same roof in insulated panels at 0.43 loses about 103 W.
For a whole year, swap the temperature difference for heating degree days. England averages about 2,150 a year (base 15.5°C), and the sum is U times area times degree days times 24, divided by 1,000, to give kWh. Prices below use the Ofgem price cap for 1 October to 31 December 2026: electricity 26.32p per kWh and gas 7.97p per kWh.
| 12 m² roof | Heat lost per year | Cost with electric heating | Cost with gas heating |
|---|---|---|---|
| 16 mm polycarbonate (U 2.3) | 1,424 kWh | £375 | £113 |
| 25 mm polycarbonate (U 1.6) | 991 kWh | £261 | £79 |
| 75 mm insulated panels (U 0.43) | 266 kWh | £70 | £21 |
Against 16 mm polycarbonate the panels save about 1,158 kWh a year, worth about £305 if you heat the room with an electric heater or about £92 with gas. Against 25 mm polycarbonate the saving is about 725 kWh, or £191 with electric and £58 with gas.
These figures assume the room is kept warm through the whole heating season. If you only heat it at weekends the saving is smaller, and if it is a home office heated every weekday it is closer to the full figure.
On energy alone, a £3,000 roof heated by electric pays for itself in about 10 years against 16 mm polycarbonate. Most people do not buy for payback, though: they buy because the room becomes usable in January and bearable in August. Our guide to the cost of heating a conservatory has more worked examples.
How to get an accurate price
The calculator below gives you a guide price in under a minute, using the same rates our surveyors quote from. To turn that into a fixed price, follow these steps.
- Pick your style and rough size in the calculator, or answer a few questions on the quote form.
- Have a couple of photos of the roof ready, taken from the garden and from inside, plus your postcode.
- Book a free survey. It takes about an hour, and the surveyor measures the roof, checks the frame and answers your questions.
- Receive your fixed written quote, listing every item and extra, including any frame repair.
We never ask for a deposit before the survey, and the quote does not expire at the end of the day. Take your time, compare it with others, and ask us anything that is not clear.
Questions people ask
How much do insulated conservatory roof panels cost per m²?
Fitted, most roofs work out at about £250 to £450 per m² of roof area. Larger roofs sit towards the lower end because set-up and clearing time is shared across more panels. Try the cost calculator for your own size.
Is the survey free?
Yes. The survey is free and there is no obligation to go ahead. You get a fixed written quote afterwards that lists every item, including any frame repair the surveyor found.
Is building control included in the price?
Yes. We agree the specification with building control before ordering, make the application on your behalf and include your council's fee in the quote. Read more in our guide to building regulations for solid conservatory roofs.
Is it cheaper to just replace the polycarbonate?
Yes, new polycarbonate costs about £2,000 to £3,500 for a 3 m by 3 m roof, a little less than panels. It keeps the same problems, though: 16 mm sheets lose heat about five times as fast as a 75 mm panel, and the room still overheats in summer.
Are there any grants for a new conservatory roof?
Not as a rule. The main government insulation schemes do not normally cover conservatory roofs. Our guide to conservatory roof grants explains what does and does not apply.
