Quick answer: Replacing a conservatory roof costs a modelled UK average of £5,501 in July 2026, with a typical range of £3,576 to £8,527. A solid or insulated roof could save up to £351 a year in reduced heat loss (estimate) — a modelled payback of around 16 years.
Conservatories are usually the leakiest room in the house, and the roof is why. This page gives the replacement-cost statistics from our UK Home Energy Cost Index; for the choice between tiled, solid and high-spec glass roofs, see the conservatory roof guide.
Key conservatory roof statistics for 2026
- Replacing a conservatory roof costs a modelled UK average of £5,501 — Green Reach Energy Cost Index, July 2026 (modelled).
- Typical replacements range from £3,576 to £8,527 depending on roof type and conservatory size — Green Reach Energy Cost Index, July 2026 (modelled).
- London replacements average a modelled £6,601 — the highest in the UK — Green Reach Energy Cost Index, July 2026 (modelled).
- Northern Ireland is the cheapest region at £5,061; the North East follows at £5,116 — Green Reach Energy Cost Index, July 2026 (modelled).
- The London–Northern Ireland gap is £1,540, roughly 30% — Green Reach Energy Cost Index, July 2026 (modelled).
- North West replacements average £5,226; Wales £5,171 — Green Reach Energy Cost Index, July 2026 (modelled).
- A solid or insulated replacement roof could save up to £351 a year by cutting heat loss (estimate) — Green Reach Energy Cost Index, July 2026 (modelled).
- Modelled simple payback is around 16 years — most owners buy usable space first and savings second — Green Reach Energy Cost Index, July 2026 (modelled).
- A conservatory roof replacement costs within £30 of a typical double glazing installation (£5,530) in our model — Green Reach Energy Cost Index, July 2026 (modelled).
- Heat escaping through an old polycarbonate roof was bought at 7.33p/kWh for gas under the July–September 2026 Ofgem price cap.
- The typical dual-fuel household pays £1,862 a year this quarter — Ofgem, July 2026.
Conservatory roof costs by UK region
Roof replacement is a multi-day job for a small team, so regional labour rates matter. Modelled averages for all 12 UK regions:
| Region | Modelled average installed cost | vs UK average |
|---|---|---|
| UK average | £5,501 | — |
| London | £6,601 | +20% |
| South East | £6,161 | +12% |
| East of England | £5,831 | +6% |
| South West | £5,776 | +5% |
| West Midlands | £5,391 | −2% |
| East Midlands | £5,336 | −3% |
| Scotland | £5,281 | −4% |
| Yorkshire & the Humber | £5,226 | −5% |
| North West | £5,226 | −5% |
| Wales | £5,171 | −6% |
| North East | £5,116 | −7% |
| Northern Ireland | £5,061 | −8% |
Within any region, the biggest swing factors are the roof system itself — lightweight tiled and solid insulated roofs sit at the upper end, replacement polycarbonate at the lower — plus the conservatory’s footprint and whether the existing frames can take the new load. Old polycarbonate is the worst offender for heat loss, which is why replacing it moves the savings needle at all.
All modelled figures on this page come from the Green Reach Energy Cost Index — our July 2026 estimates built from national installed-price baselines and regional labour indices, not quotes for your specific home. Real conservatory roof prices vary with property type, spec and installer, so treat these as a starting point and read how we calculate costs for the full method and its limitations.
Grants and the honest maths
None of the schemes on our verified grants list covers conservatory roof replacement as of July 2026 — this is a self-funded improvement. That said, the value case is rarely bills alone: a conservatory you can use in January is effectively an extra room, which is why we flag the payback figure as context rather than a verdict. If your budget is strictly energy-saving-per-pound, our 2026 grant round-up and the insulation statistics point to better returns first.
To weigh a roof replacement against other upgrades for your home, try the savings calculator.
Download the dataset
The full Cost Index — 9 upgrades × 12 UK regions, July 2026 — as CSV: gre-cost-index.csv. Free to reuse with attribution (CC BY 4.0) — please credit Green Reach Energy and link the methodology. Figures are modelled estimates, not quotes.