How we approach conservation rooflights in Chiswick
Thinking about conservation rooflights in Chiswick? The short answer: slim, low-profile steel-look rooflights for period and listed roofs. The longer answer depends on your roof, which is why we survey before we price.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Conservation rooflights suit slate and plain-tile roofs where a quiet roofline matters.
Neighbouring towns include Hammersmith (2 km) and Acton (2 km). We offer a survey date when we reply to your enquiry.
Options we can specify in Chiswick
- Central vertical glazing bar
- Steel or aluminium frames
- Blinds
- Flashings for slate or plain tile
- Manual or electric opening
- Often preferred by conservation officers
- Double glazed behind a period look
Things we check at survey
- Lead or matching flashings may be required
- Listed building consent is needed for listed buildings
Planning and building rules for Chiswick
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. 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.
Building Regulations Approved Document L sets a limiting U-value of 2.2 W/m²K for new or replacement rooflights in existing homes, measured in the horizontal plane; roof windows need 1.4 W/m²K or a Band B energy rating. 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.
Our planning guide covers each nation in more detail.
Conservation rooflights prices in Chiswick
These are typical supply-and-fit ranges. For an address in Chiswick, 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 |
The process, step by step
- Tell us what you have. Send the W4 postcode, a rough size and a couple of photos.
- 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.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
Related work in Chiswick
Questions about conservation rooflights in Chiswick
Can you copy an original rooflight?
Some makers produce bespoke sizes to match an existing opening. We can survey and quote.
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.
Do they suit slate roofs?
Yes — flashings are made for slates and for plain tiles.
How do I book a survey in Chiswick?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Can you work alongside my builder in Chiswick?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
