Conservatory Roof Cost Calculator UK
Get a 2026 conservatory roof replacement estimate in 30 seconds. Replacement polycarbonate, solar-control glass, insulated panels or a full solid tiled conversion — by size, style and region. Supply-and-fit rates. No email required.
Estimate Your Conservatory Roof Cost in 30 Seconds
5 steps. Covers removal of the old roof, the new roof system, flashings, trims, labour and VAT. Solid conversions include the plastered ceiling and building-control sign-off in the typical range.
How This Calculator Works
Our conservatory roof calculator combines the roof system, roof area, conservatory style and region with real 2026 UK supply-and-fit pricing from vetted roofers and conservatory installers across our 519-town database.
System Rates (per m², fitted)
- Replacement polycarbonate — £190–£320/m²
- Insulated roof panels — £250–£350/m²
- Glass (solar-control units) — £380–£560/m²
- Solid tiled (lightweight) — £700–£1,100/m²
- Style uplift: Victorian/Edwardian +12%, P- or T-shape +22% (extra cuts, hips and flashings)
Rates include stripping the old roof, the new system, flashings, trims, labour and VAT.
Assumptions & Adjustments
- Frames must pass a structural survey — lightweight tile systems weigh roughly 10–25 kg/m²
- Solid conversions include plasterboard ceiling, insulation and building-control sign-off
- Optional extras: roof window +£500, insulated pelmet with downlights +£900
- Region multipliers: London +27% … Northern Ireland −12% (Midlands baseline)
- Estimate only — a firm quote always follows a site survey
Converting a translucent roof to a solid roof is building work — building regulations approval applies.
Glass, Solid or Polycarbonate: Which Roof Is Right for You?
The roof system you choose is the single biggest factor in both the price and how usable the room feels afterwards. Each option trades cost against insulation, brightness and year-round comfort.
- Replacement polycarbonate (£190–£320/m²) — the cheapest like-for-like fix. It refreshes a tired, leaking or discoloured roof but insulates poorly, so the room still runs cold in winter and hot under summer sun. Best if the budget is tight and you use the space only occasionally.
- Solar-control glass (£380–£560/m²) — self-cleaning, double-glazed units that roughly halve heat loss compared with old polycarbonate and cut glare. The room stays far brighter than under a solid roof while being usable across more of the year.
- Insulated roof panels (£250–£350/m²) — a middle path that drops composite insulated panels into the existing glazing bars for a quick warmth upgrade without a full rebuild.
- Solid tiled conversion (£700–£1,100/m²) — a lightweight warm-roof system with a plastered, insulated ceiling that makes the conservatory perform like a normal extension room. It is the most expensive route and counts as building work, but it adds the most usable, year-round living space.
If you are weighing up a whole new build instead of re-roofing, compare the numbers with our conservatory cost calculator and the wider conservatory cost guide. For a deeper look at whether a warm, solid roof pays back on an existing conservatory, our solid roof conversion guide weighs the year-round comfort gain against the higher cost, and you can set the figures beside pitched-roof pricing with the roof cost calculator or browse the full cost guide hub.
Building Regulations and Structural Checks for a Solid Roof
Swapping a translucent conservatory roof for a solid, insulated one is classed as building work, so it needs Building Regulations approval and sign-off — polycarbonate and glass replacements that keep the roof glazed usually do not. Approval covers the new structure, its thermal performance and ventilation, and a reputable installer arranges the building-control application and final certificate as part of the job.
Because a tiled roof is heavier than the glazing it replaces, your existing frames and foundations must be checked before work starts. Modern lightweight tile systems weigh roughly 10–25 kg/m² — far less than natural slate or concrete tiles — but older uPVC frames sometimes need reinforcing posts or a new ring beam to carry the load safely. A structural survey confirms what the frame and base can take, and any strengthening is priced after that survey rather than guessed up front.
For the official rules on when Building Regulations apply to conservatory and roof alterations, the UK Planning Portal conservatory guidance is the authoritative reference to read before you commit.
Typical Conservatory Roof Replacement Costs (2026)
Supply & fit incl. strip-off, new system, flashings, trims, labour & VAT, Midlands baseline. Solid conversions include plastered ceiling and building-control sign-off.
| Roof system | Typical size | Cost range |
|---|---|---|
| Replacement polycarbonate | 12 m² lean-to | £2,280–£3,840 |
| Insulated roof panels (retrofit) | 12 m² lean-to | £3,000–£4,200 |
| Glass roof (solar-control) | 12 m² lean-to | £4,560–£6,720 |
| Solid tiled roof (lightweight) | 12 m² lean-to | £8,400–£13,200 |
| Solid tiled roof (lightweight) | 16 m² Victorian | £12,540–£19,710 |
Want the full method and per-material detail? Read the complete 2026 roof replacement cost guide.
Frequently Asked Questions
How much does it cost to replace a conservatory roof in 2026?
Do I need building regulations for a solid conservatory roof?
Will my conservatory frames take the weight of a tiled roof?
Is a glass or solid roof better than polycarbonate?
How long does a conservatory roof replacement take?
Can I convert a conservatory roof to solid without rebuilding the whole conservatory?
Does a new conservatory roof cut energy bills or add value?
How Long It Takes and How to Choose an Installer
A straight polycarbonate or glass re-roof is usually a 1–2 day job, while a full solid tiled conversion — including the internal plastered ceiling, insulation and any electrics — typically runs to 3–5 days on site. Faceted Victorian, Edwardian and P-shaped roofs take a little longer because of the extra cuts, hips and flashings.
Before you accept a quote, it is worth checking a few things with each installer:
- Ask whether the price includes stripping and disposing of the old roof, all flashings and trims, and — for solid conversions — the plastered ceiling and building-control sign-off, so you are comparing like with like.
- Confirm a structural survey of the frames and base is part of the quote, not an afterthought that changes the price later.
- Check the lead time and whether the work is weather-dependent, as an open roof needs a dry run of days.
- Get the guarantee terms in writing and ask how long the chosen roof system is expected to last — from 10–15 years for polycarbonate up to 40 years or more for a solid tiled roof.
Use the estimate from the calculator above as your budget anchor, then compare vetted local specialists so you can judge each quote on scope, not just the headline price. If you want to understand how roofers price access, guarantees and warm-roof detailing across different roof types before those conversations, our roofing guides give useful background.
Compare Conservatory Roof Quotes from Vetted Local Pros
Tell us about your conservatory once and get up to 3 free, no-obligation quotes from local specialists.
Get My 3 Free Quotes →