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Why replace your roof
- Warmer in winter
- Cooler in summer
- Quiet when it rains
- A room you use all year
Our prices and data come from Met OfficeHM Land RegistryLABCPlanning PortalWhich?
Conservatory roof replacement in City of Westminster
What a new conservatory roof costs in City of Westminster in 2026, how the local weather affects each option, and free quotes from installers who cover NW1, NW8, SW1A.
What a new conservatory roof costs in City of Westminster
Medium conservatory (about 4m x 3.5m), fitted, adjusted for London labour costs.
| Roof | Typical in City of Westminster | Range | Fitting |
|---|---|---|---|
| Tiled roof | £12,200 | £9,400 to £15,350 | 3 to 6 days |
| Glass roof | £6,600 | £4,450 to £8,900 | 2 to 4 days |
| New polycarbonate roof | £4,950 | £3,450 to £6,600 | 1 to 2 days |
| Hybrid roof | £12,050 | £8,400 to £16,000 | 4 to 7 days |
| Insulated roof panels | £3,950 | £2,300 to £5,850 | 1 to 3 days |
| Orangery conversion | £31,100 | £17,800 to £44,450 | 7 to 15 days |
London prices run about 27% above the UK middle, reflecting the highest labour rates in the UK and harder access and parking. Your quotes depend on the shape, the survey and the system. Full cost guide.
A typical tiled roof in City of Westminster (£12,200) works out at about 0.4% of the average semi-detached house price in Westminster (£2,760,923, HM Land Registry 2026-07). That is the room you gain for the money, without building an extension.
Why conservatories in City of Westminster get too hot and too cold
Summers here are among the sunniest in the UK (about 219 hours of sunshine in July), so overheating is the main complaint. A solid roof, or solar control glass with a low g-value, makes the biggest difference. The chart shows the average daytime high and night time low for each month in the Met Office's England South East and Central South climate district, the closest match for City of Westminster. July afternoons here average 22.3°C against 19.6°C across the UK. Inside a south facing polycarbonate conservatory the air runs far hotter than outside on a sunny day, and colder on a clear winter night.
Homes in Westminster
Insulate or replace in City of Westminster?
If budget is the main worry, insulated roof panels fitted into the existing frame cost £2,300 to £5,850 here and make a noticeable difference to winter warmth and rain noise. A full lightweight tiled roof at £9,400 to £15,350 goes further: a plastered ceiling, much lower heat loss and a room that feels like part of the house. Cheap internal kits and blinds help with glare but do little for heat loss. Tiled roof vs insulated panels.
Conservatory roof repairs in City of Westminster
Leaks usually start at the box gutter, the wall flashing where the roof meets the house, or perished seals and end caps on polycarbonate sheets. A single repair can be worth doing on a roof under 10 years old. On an older polycarbonate or glass roof with repeated leaks, most homeowners find the money is better spent on a replacement that also fixes the heat and cold. Leaking roof: repair or replace.
Building control and planning in City of Westminster
City of Westminster is in the Westminster council area, Greater London. For a solid or tiled roof your installer applies for building control approval, either through Westminster Council's building control team or a registered building control approver, and you should get a completion certificate at the end. Keep it: a buyer's solicitor will ask for it when you sell.
Planning permission is not usually needed to replace the roof of an existing conservatory. If your home is listed or in a conservation area, speak to Westminster Council's planning team before you sign. Building regulations guide.
Nearby areas
Installers covering City of Westminster usually work across these towns too.
Conservatory roof questions in City of Westminster
How much does a conservatory roof replacement cost in City of Westminster?
In City of Westminster a lightweight tiled roof for a medium conservatory typically costs £9,400 to £15,350, a solar control glass roof £4,450 to £8,900, and insulated roof panels £2,300 to £5,850, fitted. Prices in London run about 27% above the UK middle because of the highest labour rates in the UK and harder access and parking.
Do I need planning permission for a new conservatory roof in City of Westminster?
Usually not. Replacing the roof on an existing conservatory is normally permitted development. Check with Westminster Council's planning team first if your home is listed, in a conservation area, or covered by an Article 4 direction. A solid tiled roof will need building control approval, which your installer should arrange.
Which conservatory roof suits the City of Westminster climate?
Summers here are among the sunniest in the UK (about 219 hours of sunshine in July), so overheating is the main complaint. A solid roof, or solar control glass with a low g-value, makes the biggest difference. In this part of the country, July afternoons average 22.3°C with around 219 hours of sunshine in July, and February nights average 1.8°C (Met Office 1991 to 2020 averages).
How do I find conservatory roof installers in City of Westminster?
Answer the questions on this page and we will pass your request to Leads 2 Trade, who introduce up to four installers covering NW1, NW8, SW1A, SW1E. Installers in their roof network need an LABC certificate for their roof system and an insurance backed guarantee. Always compare at least three written quotes.
How long does a conservatory roof replacement take?
A tiled roof takes 3 to 6 days on site, a glass roof 2 to 4 days and insulated panels 1 to 3 days. Lead times before the start date vary with local demand and the season.
Sources: Met Office UK climate averages 1991 to 2020; HM Land Registry UK House Price Index; VOA Council Tax: Stock of Properties; ONS; postcodes.io. Contains public sector information licensed under the Open Government Licence v3.0.
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