Skylight installation in Harrow: what is involved?
We handle skylight installation across Greater London, including Harrow. 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.
Party walls are a fact of life in London terraces, and rooflights close to a shared wall need detailing that keeps the neighbour's side dry too. Typical uses for skylight installation include builders' projects and retrofits into finished roofs.
Jobs in Harrow are planned around access: whether the roof can be reached from the garden, whether a hoist or crane is needed, and where we can park. We check this when we measure.
Choices for your Harrow project
- Upstands and flashings
- Internal plaster reveal
- Electrics coordination
- Fit only (customer-supplied units)
- New openings with joist trimming
- Free survey for new installations
- New openings in existing roofs
Before you order: points to check
- Fit-only work relies on the product being suitable and complete
- Work at height is planned with suitable access
Do you need permission in Harrow?
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.
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. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
Read the planning permission guide before you commit to a design.
Guide prices for Harrow
These are typical supply-and-fit ranges. For an address in Harrow, 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 |
|---|---|---|
| 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 Harrow address.
- 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
Other services in Harrow
Common questions
Do I need a structural engineer?
For new openings that cut joists or rafters, a structural check is sensible and building control may ask for calculations.
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.
Who handles building control?
We tell you which route applies — building control approval, a building warrant in Scotland, or in England and Wales self-certification by a registered competent person — and supply the product data.
Is the survey in Harrow 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 Harrow?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
