Quick Answer
Conservatory roof replacement in the UK typically costs between £800 and £15,000 depending on the roof type, size and material. A polycarbonate replacement is the cheapest option at around £800–£2,500. A solid tiled roof costs the most, usually £5,000–£15,000, but provides the best insulation and the biggest improvement to how the room feels year-round.
How much does conservatory roof replacement cost in the UK?
For a standard-sized conservatory, expect to pay somewhere between £800 and £15,000 to replace the roof, with the final figure depending almost entirely on which material you choose. A basic polycarbonate swap can come in as low as £800 for a small conservatory. A full solid tiled roof on a larger room can run to £15,000 or more once you factor in structural work.
That's a wide range, so it's worth breaking it down by roof type rather than treating conservatory roof replacement as one single price. Most homeowners are choosing between three options: polycarbonate, glass, and solid (tiled) roofing, and each sits at a very different point on the cost scale.
| Roof type | Typical cost range |
|---|---|
| Polycarbonate | £800–£2,500 |
| Glass | £2,500–£6,000 |
| Solid / tiled | £5,000–£15,000 |
The three main roof types and what each costs
Polycarbonate is the cheapest and most common material found on older conservatories. A like-for-like polycarbonate replacement typically costs £800–£2,500, depending on the size of the roof and whether any supporting timber or glazing bars need replacing at the same time. It's a reasonable option if budget is the main concern, but it offers the weakest thermal performance of the three, meaning the room will likely still run hot in summer and cold in winter.
Glass roofing sits in the middle, usually costing £2,500–£6,000. Modern conservatory glass uses self-cleaning coatings and solar control glazing that reflects heat in summer, which makes a noticeable difference over old-style single-glazed polycarbonate. Glass also lets in more natural light than a solid roof, which matters if the conservatory doubles as a sunroom or dining space.
Solid tiled roofing is the premium option, typically costing £5,000–£15,000 for a full replacement including structural strengthening. It replaces the transparent roof entirely with an insulated, tiled structure that matches the rest of the house, often incorporating skylights or roof windows to keep some natural light. Because it's essentially a proper insulated roof rather than a glazed one, it makes the biggest difference to how usable the conservatory is in winter and how comfortable it stays in summer.
Our conservatory roof calculator lets you estimate the cost for your specific roof dimensions across all three material types, so you can compare like for like before getting quotes.
What affects the cost?
Beyond the material itself, several factors move the price within each range:
- Size and shape, a large lean-to conservatory costs less to reroof than an equivalent-sized Victorian or P-shaped conservatory, because the more complex the roofline, the more cutting, sealing and labour is involved.
- Access: conservatories in tight side returns or behind other structures cost more to work on, since scaffolding or careful manual handling of materials becomes necessary.
- Removal of the old roof: stripping out an existing roof, especially an older polycarbonate or asbestos-containing structure, adds to the labour cost and sometimes requires specialist disposal.
- Structural work: solid tiled roofs are heavier than glass or polycarbonate, so the existing frame often needs to be checked and reinforced before installation, which can add a meaningful amount to the final bill.
- Extras: roof lanterns, skylights, integrated lighting or additional insulation upgrades to the walls will all push the price above a basic like-for-like swap.
Is a solid tiled conservatory roof worth the cost?
This is the question most homeowners are really asking, and the honest answer depends on how you actually use the room.
If your conservatory currently sits empty for half the year because it's unbearable in summer and freezing in winter, a solid tiled roof is likely to pay for itself in usability, you get a room that functions as proper living space year-round rather than a fair-weather extension. Some homeowners also find it adds more to their home's resale value than a glass or polycarbonate roof, since a solid roof reads to buyers as a "real room" rather than a conservatory that needs replacing.
If your conservatory is already reasonably comfortable, or you use it mainly in spring and summer anyway, the jump to a solid roof may not be worth the extra cost compared to upgrading to modern insulated glass, which solves a good part of the temperature problem for roughly half the price.
Do I need planning permission to replace a conservatory roof?
Usually no. Replacing a conservatory roof like-for-like, or upgrading the material, is normally treated as permitted development rather than requiring planning permission, as the Planning Portal's conservatories guidance explains, as long as the conservatory itself doesn't change in size or footprint and the work doesn't breach any specific local restrictions.
There are caveats. If your home is a listed building, is in a conservation area, or has had its permitted development rights removed by a previous planning condition, you may need consent: GOV.UK's planning permission guidance is the place to start. Building regulations are a separate matter from planning permission, a solid tiled roof replacement in particular is more likely to trigger a building regulations check, because it changes the thermal performance and structural loading of the room. It's worth a quick call to your local authority's building control team before work starts, and any reputable installer should be able to advise on this as part of their quote.
Lightweight tiled conservatory roofs, what are they and are they cheaper?
Lightweight tiled roofing systems have become popular as a middle ground between glass and a full solid roof. They use composite or lightweight tiles on an insulated frame rather than traditional heavy roof tiles, which means the existing conservatory structure often doesn't need the same level of reinforcement a full solid roof would require.
This typically brings the cost down to somewhere around £5,000–£10,000, sitting at the lower end of the full solid roof range, while still delivering most of the insulation and light-blocking benefits of a solid roof. If the main appeal of a solid roof is thermal comfort rather than an exact tile match to the house, a lightweight system is worth asking installers about directly, since it can bring a noticeable saving without a huge compromise on performance.
How to get a fair quote
Conservatory roof replacement is an area where prices between installers can vary significantly for what's effectively the same job, so it's worth being specific when comparing quotes. Ask each installer:
- Whether the quote includes removal and disposal of the existing roof, or whether that's charged separately
- What warranty applies to both materials and workmanship, and for how long
- Whether any structural survey or building regulations sign-off is included in the price
- Whether the quote is fixed, or subject to change once work starts (a common source of unexpected additional costs)
Getting at least three quotes on a like-for-like specification is the most reliable way to spot outliers, whether that's an installer overcharging or one that's cutting corners on materials to undercut the competition.
If you're planning other outdoor or driveway work alongside your conservatory upgrade, our tarmac calculator is a useful next stop for estimating that cost separately.
Frequently asked questions
What is the cheapest way to replace a conservatory roof?
A like-for-like polycarbonate replacement is the cheapest option, typically £800–£2,500, though it offers the least improvement in thermal comfort compared with glass or solid roofing.
How long does conservatory roof replacement take?
A straightforward polycarbonate or glass swap usually takes 1–3 days. A solid tiled roof replacement, which involves more structural work, typically takes 1–2 weeks depending on the size and complexity of the conservatory.
Will a new conservatory roof reduce my energy bills?
It can, particularly if you're upgrading from old single-glazed polycarbonate to insulated glass or a solid tiled roof, since both significantly reduce heat loss in winter and heat gain in summer compared with basic polycarbonate.
Can I replace just the roof without replacing the whole conservatory?
Yes, this is the most common type of conservatory upgrade. As long as the existing frame is structurally sound, installers can replace the roof while keeping the walls, windows and base exactly as they are.
Does a conservatory roof replacement add value to my home?
It can, particularly a solid tiled roof upgrade, since it turns a conservatory that may look dated or impractical into usable year-round living space, which tends to appeal more to buyers than a room that's only comfortable for part of the year.
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