Conservation rooflights in Isleworth: what is involved?
Conservation rooflights in Isleworth means slim, low-profile steel-look rooflights for period and listed roofs. We cover the TW7 district and the rest of Greater London, with a survey before any price is fixed.
Victorian and Edwardian terraces with narrow side returns are typical of much of London, and a glass roof or long flat rooflight is the usual way to keep the back rooms bright once the return is built over. Typical uses for conservation rooflights include period, listed and conservation-area roofs.
Neighbouring towns include Hounslow (1 km) and Richmond (3 km). We offer a survey date when we reply to your enquiry.
Choices for your Isleworth project
- Flashings for slate or plain tile
- Manual or electric opening
- Steel or aluminium frames
- Central vertical glazing bar
- Blinds
- Double glazed behind a period look
- Suits slate and plain-tile roofs
Before you order: points to check
- Conservation officers may specify size and position
- Projection above the roof line is limited — usually as flush as possible
Planning, building control and Isleworth
In England a rooflight on a house is usually permitted development under Class C if it projects no more than 150 mm beyond the roof slope and sits no higher than the ridge. Listed buildings need listed building consent, flats have no householder permitted development rights, and an Article 4 direction can remove the rights in some conservation areas.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. The Future Homes and Buildings Standards, published in March 2026, apply from 24 March 2027 and keep the 2.2 W/m²K limit for rooflights.
Read the planning permission guide before you commit to a design.
What do conservation rooflights cost in Isleworth?
These are typical supply-and-fit ranges. For an address in Isleworth, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| 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 |
What happens next
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Nearby towns
Other services in Isleworth
Common questions
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 the council accept it?
We cannot promise an outcome, but a slim conservation profile fitted low in the roof is the type many conservation officers ask for.
Can they open?
Yes, most are top-hung or side-hung for ventilation and cleaning, with manual or electric operation.
Is the survey in Isleworth free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
How do I book a survey in Isleworth?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
