How we approach skylight installation in Dulwich
We handle skylight installation across Greater London, including Dulwich. In short: survey, supply and fit — new openings, extensions and fit-only work. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
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. Think of skylight installation for new extensions, new openings and fit-only jobs.
From Dulwich to Brixton, Peckham and Lewisham, the same survey-first process applies: measure, specify, fix the price, then fit.
Specification options
- Electrics coordination
- Supply and fit
- Upstands and flashings
- New openings with joist trimming
- Fit only (customer-supplied units)
- New openings in existing roofs
- Making good inside included
Before you order: points to check
- Building Regulations approval (a building warrant in Scotland) may be needed
- Structural changes may need an engineer's check
Consents for skylight installation in Dulwich
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. 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. 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.
See our building regulations guide for U-values, glazing limits and self-certification.
What does skylight installation cost in Dulwich?
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| New opening in an existing roof, supply and fit | £2,395 – £5,395 | £1,995 – £4,495 |
| Supply and fit into a new extension Typical | £1,435 – £3,595 | £1,195 – £2,995 |
| Fit only, customer-supplied unit | £595 – £1,195 | £495 – £995 |
From enquiry to finished job
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Dulwich address.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
More we do in Dulwich
Skylight installation in Dulwich: questions
Do you work with builders?
Yes — on new extensions we fit to the builder's programme once the upstand or roof is ready.
How long does installation take?
Fitting into a prepared upstand takes about a day. A new opening in an existing roof, including making good, often takes two to three days.
Is the survey free?
Yes, for new installations. Repair visits are charged.
Is the survey in Dulwich 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 Dulwich?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
