Conservatory roof replacement cost calculator
A conservatory roof replacement costs £2,000 to £4,000 for Polycarbonate swap; £2,500 to £5,500 for Glass roof and £6,000 to £12,000 for Solid insulated tiled roof. Set the options below to price your own, adjusted for where you live.
Work out what replacing a conservatory roof costs. Pick the roof you want to put on, tick building regulations if you are going solid, and this calculator gives you a price range for your region. Our own guide prices rather than quotes.
Conservatory roof replacement cost calculator
Set it up to match your job. Everything updates as you change it, and nothing is sent anywhere.
Built from the same figures as our conservatory roof replacement guide: £2,000 to £4,000 for a like-for-like polycarbonate swap, £2,500 to £5,500 for a glass roof and £6,000 to £12,000 for a solid insulated tiled roof, with building regulations and any structural work adding £500 to £1,500. Regional figures use the same multipliers as every other page here. A solid roof is much heavier than glass or polycarbonate, so the existing frame and base have to be assessed before anyone quotes: if they cannot carry it, the frame needs strengthening or replacing and that is a different job from a roof swap. What the range does not cover is new plastering and decorating inside once the roof is solid, which most people want and few quotes include.
Conservatory roof replacement cost by region
| Type of roof | UK average | London | North / Scotland / Wales |
|---|---|---|---|
| Polycarbonate swap | £2,000 to £4,000 | £2,600 to £5,200 | £1,850 to £3,700 |
| Glass roof | £2,500 to £5,500 | £3,300 to £7,200 | £2,300 to £5,100 |
| Solid insulated tiled roof | £6,000 to £12,000 | £7,800 to £15,500 | £5,500 to £11,000 |
Guide prices for conservatory roof replacement, before any extras. UK guide prices reviewed June 2026, not quotes. Set the calculator above to your own job to add the extras.
Which roof actually solves the problem
Almost everyone replacing a conservatory roof is trying to fix the same thing: a room too hot in summer and too cold in winter. That matters because the three options solve it to very different degrees, and the cheapest one barely solves it at all.
A like-for-like polycarbonate swap at £2,000 to £4,000 fixes leaks, discolouration and noise in rain. It does not meaningfully fix temperature. A glass roof at £2,500 to £5,500 with modern solar-control coatings is a real improvement and keeps the light. A solid insulated tiled roof at £6,000 to £12,000 turns the space into a room you use in February, at the cost of most of the overhead light.
The weight problem nobody mentions until the survey
A solid tiled roof weighs several times what a polycarbonate one does. Conservatory frames and bases were built for the roof they came with, so the first question on a solid conversion is whether yours can carry the new load, and that is a structural judgement rather than a sales one.
Often the answer is yes with reinforcement at the eaves and corner posts, which is inside the £500 to £1,500 building regulations and structural line. Sometimes the answer is that the frame or base is not up to it, and then you are pricing a new conservatory rather than a new roof. Be wary of any quote for a solid roof that has not looked at the base.
When building regulations apply
A like-for-like glass or polycarbonate swap normally needs nothing. Fitting a solid roof usually does need building regulations approval, because it changes the room from an exempt conservatory into a permanent part of the house, which brings insulation standards and structural sign-off with it.
That is not a reason to avoid it and it is a reason to get it right, because an unapproved solid roof shows up on a buyer's solicitor's list years later and is awkward to regularise. Budget the £500 to £1,500 and get the certificate.
Replacing the roof against replacing the conservatory
A roof swap is nearly always the better value. A new conservatory is £5,000 to £35,000 depending on style and size, so if the frame, glazing and base are sound then spending £2,500 to £12,000 on the roof alone buys most of the benefit for a fraction of the cost.
The exception is when the frame is failing, the glazing units have blown, or the base is inadequate for a solid roof. At that point you are paying twice, and pricing a replacement, or a small extension, alongside the roof quote is the sensible move.
Common questions
How much does a conservatory roof replacement cost in the UK?
About £2,000 to £4,000 for a like-for-like polycarbonate swap, £2,500 to £5,500 for a glass roof and £6,000 to £12,000 for a solid insulated tiled roof, with £6,500 the typical figure across all three. Building regulations and any structural work add £500 to £1,500. London runs about 30% above the UK average and the North, Scotland and Wales about 8% below.
How much does a solid conservatory roof cost?
About £6,000 to £12,000 supplied and fitted, plus £500 to £1,500 for building regulations approval and any strengthening the frame needs. A standard 3m by 3m conservatory sits toward the lower end and a 4m by 4m or an unusual shape toward the top. It is the most expensive option and the only one that makes the room genuinely usable all year.
Is a glass or solid roof better for a conservatory?
Glass at £2,500 to £5,500 keeps the light and, with modern solar-control coatings, is a real improvement on old polycarbonate. Solid at £6,000 to £12,000 makes the room usable in January but takes away most of the overhead light and usually needs building regulations. If the conservatory is your main living space, go solid. If it is a bright garden room you use most of the year, glass is often the better trade.
Do I need building regulations to replace a conservatory roof?
Not for a like-for-like glass or polycarbonate swap. Usually yes for a solid or tiled roof, because it converts an exempt conservatory into a permanent part of the house, which brings insulation standards and structural sign-off. That is about £500 to £1,500 including any frame strengthening. Skipping it causes problems when you sell, so it is worth doing properly.
Can any conservatory take a solid roof?
No, and this is the question to settle before you get attached to the idea. A solid roof weighs several times what polycarbonate does, and the frame and base were built for the original roof. Many conservatories are fine with reinforcement at the eaves and corner posts. Some are not, and then you are looking at a new conservatory rather than a new roof. A quote for a solid roof that has not assessed the base is not a real quote.
These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing. These are independent Costwise guide prices, reviewed June 2026, not quotes and not a survey of real quotes. A real price depends on access, condition and what the job actually involves, so use this to sanity-check what you are told and always get three written quotes.