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- Warmer in winter
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Our prices and data come from Met OfficeHM Land RegistryLABCPlanning PortalWhich?
Conservatory roof replacement in Harrow
What a new conservatory roof costs in Harrow in 2026, how the local weather affects each option, and free quotes from installers who cover HA1, HA2, HA3.
What a new conservatory roof costs in Harrow
Medium conservatory (about 4m x 3.5m), fitted, adjusted for London labour costs.
| Roof | Typical in Harrow | 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 Harrow (£12,200) works out at about 1.8% of the average semi-detached house price in Harrow (£663,954, HM Land Registry 2026-07). That is the room you gain for the money, without building an extension.
Replacing a conservatory roof in Harrow: what is different here
Harrow is classic Metro-land: streets of 1930s semis built along the Metropolitan line, with older villages such as Harrow on the Hill and Pinner preserved as conservation areas. A conservatory across the back of an interwar semi is the most common job, and a tiled roof tends to sit well with the house. Check with the council first if you live in one of the conservation areas.
Harrow at a glance
Harrow has about 260,534 residents, the 19th largest of the 32 Greater London towns and villages in our data, and sits in Harrow, Greater London. Bushey is 3.8 miles away and Brent 4 miles to the south east. Postcodes here start HA1, HA2, HA3, HA5 and others.
The middle home in Harrow was built around 1930 to 1939. 14% of homes went up between 1965 and 1999, the decades when most British conservatories were added, below the UK average of 31%. Many conservatories here were added later to older houses, so ask each installer to check the frames and base can carry a heavier roof. Bungalows are uncommon here (2% of homes against 10% nationally), so most conservatories sit on two-storey houses. With 39% of homes in flats, conservatories here are concentrated in the 38% of homes that are detached or semi-detached.
The average home in Harrow sold for £526,493 in July 2026, down 2.8% on a year earlier, close to the London average of £550,037. Detached homes average £1,206,272 and semi-detached £663,954.
Why conservatories in Harrow 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 Harrow. 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 Harrow
Which roof makes most sense in Harrow?
With around 219 hours of July sunshine, summer heat is the bigger problem in Harrow. A solar control glass roof (£4,450 to £8,900 here) keeps the light and cuts the glare, but a lightweight tiled roof (£9,400 to £15,350) or a hybrid roof does far more to stop the room overheating. Blinds and films help with glare but not much with heat. Tiled vs glass roofs.
Building control and planning in Harrow
For a solid or tiled roof your installer applies for building control approval, either through Harrow 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.
Areas around Harrow
Installers covering Harrow usually work across these places too. Enter your postcode in the form to check.
- Bushey 3.8 mi north
- Brent 4 mi south east
- Moor Park 4.2 mi north west
- Ealing 5 mi south
- Borehamwood 5.3 mi north east
- Watford 5.5 mi north west
- Barnet 5.9 mi east
- Hillingdon 6.1 mi south west
- Radlett 6.3 mi north
- Rickmansworth 6.4 mi north west
Nearby local guides
Conservatory roof questions in Harrow
How much does a conservatory roof replacement cost in Harrow?
In Harrow 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.
Which areas around Harrow can get quotes?
Quotes are available across the HA1, HA2, HA3, HA5, HA7, HA8 postcodes, and in nearby Bushey (3.8 miles), Brent (4 miles), Moor Park (4.2 miles), Ealing (5 miles). Enter your full postcode in the form and we pass it to installers who cover it.
How do I check a conservatory roof installer in Harrow?
Get at least three written quotes for the same roof system and size. Ask each installer which building control route they will use (Harrow Council or a registered building control approver), whether the guarantee is insurance backed, and for the system's certification documents. Ask to see a recent local job if you can. How to compare quotes.
Is a new conservatory roof worth it on a Harrow home?
A typical tiled roof here costs about £12,200, around 1.8% of the average semi-detached price in Harrow (£663,954, HM Land Registry). Nobody can promise it adds that much to the sale price, but it turns a room you avoid into one you use all year, and a buyer's solicitor will ask for the completion certificate. Selling with a new roof.
Can a conservatory roof be replaced in winter in Harrow?
Yes. Roof replacements go ahead all year, and the old roof is normally off and the new one weathertight within a day or two. Harrow averages about 43 air frosts a year, with February the coldest month at 1.8°C overnight, so ask how the room will be protected if the job runs over a night. Replacing a roof in winter.
Do I need planning permission for a new conservatory roof in Harrow?
Usually not. Replacing the roof on an existing conservatory is normally permitted development. Check with Harrow 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.
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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