What are conservation rooflights?
Across Greater London, our conservation rooflights work covers slim, low-profile steel-look rooflights for period and listed roofs. Survey first, fixed price second, fitting third.
Many London roofs are reached only through the house or over neighbouring property, so lifting heavy glass is planned at survey rather than on the day. Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope.
Towns in Greater London
What you can choose
- Steel or aluminium frames
- Central vertical glazing bar
- Blinds
- Manual or electric opening
- Toughened or laminated double glazing
- Double glazed behind a period look
- Traditional slim profile, sits low in the roof
Planning and building rules in England
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. Replacing a rooflight or roof window can be self-certified by an installer registered with an authorised competent person scheme; otherwise building control approval is needed.
Conservation rooflights prices in Greater London
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or electric conservation rooflight | £2,755 – £4,195 | £2,295 – £3,495 |
| Standard conservation rooflight Typical | £2,035 – £2,755 | £1,695 – £2,295 |
| Small conservation rooflight | £1,795 – £2,155 | £1,495 – £1,795 |
How the job runs
- Tell us about the roof. Send the postcode, rough sizes and a photo or two through the form, WhatsApp or the guide-price tool.
- Free survey. For new installations a surveyor measures the opening, checks the roof build-up and talks through glass and options.
- Fixed written quote. You get the product, the work and the price in writing. Nothing is ordered or paid for until you agree.
- Fitting and handover. We fit, seal and make good, then hand over product data, warranties and any certificate paperwork.
Conservation rooflights in nearby areas
Common questions
Are conservation rooflights double glazed?
Most modern ones are, with slim units behind the traditional frame.
Can you copy an original rooflight?
Some makers produce bespoke sizes to match an existing opening. We can survey and quote.
Do they suit slate roofs?
Yes — flashings are made for slates and for plain tiles.
Do I need consent for a conservation rooflight?
On a listed building you need listed building consent. In a conservation area, check with the council — many areas have Article 4 directions affecting roof alterations.
Will I need planning permission in Greater London?
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line.
