The short answer
Fitting a skylight or roof window in the UK typically costs around £900–£2,600 per unit installed, including supply and labour, with a standard mid-range Velux roof window averaging about £1,100 fitted. The window itself can run from roughly £330–£550 for a small unit up to £1,000–£3,500 for a large or balcony rooflight, while labour for a straightforward fit on an accessible pitched roof is usually £300–£600 per window. The main extras are scaffolding, which can add around £500 if third-party access is needed, and a flashing kit at roughly £80–£180. The figure depends on the unit, your roof type and access, and where you are in the country.
Price depends mainly on the rooflight you choose, the roof it goes into and how easy the access is. The figures below are typical installed prices for guidance, not quotations.
Typical UK costs
- Skylight fitted (per unit)£900–£2,600
- Standard Velux, fitted~£1,100
- Window supply only£330–£3,500
- Labour per window£300–£600
- Scaffolding (if needed)~£500
What drives the price
- The unit itself: a small fixed rooflight is far cheaper than a large opening, electric or balcony unit — supply alone spans £330 to £3,500.
- Roof type & access: a single-storey pitched roof with good access is the lowest-priced; two storeys, a flat roof or awkward access means more scaffold and time.
- Scaffolding: if a tower or ladder won't reach safely, third-party scaffold can add around £500.
- Extras: flashing kits (£80–£180), blinds, electric controls and any structural work to widen the opening all add to the figure.
| Item | Typical figure | Notes |
|---|---|---|
| Skylight fitted (per unit) | £900–£2,600 | supply & labour, standard fit |
| Window supply only | £330–£3,500 | small fixed to large balcony |
| Labour per window | £300–£600 | good access, pitched roof |
| Flashing kit | £80–£180 | more for specialist setups |
| Scaffolding | ~£500 | if third-party access needed |
Indicative UK figures for guidance. Sources: Checkatrade and MyJobQuote cost guides.
Why two quotes can look so different
The biggest swing is access. A skylight on a low, accessible pitched roof can be a same-day job, while the identical unit on a two-storey roof might need a full scaffold and a second visit. Region matters too — London and the South East commonly run 20–30% higher than the national figures. That is why a number on its own means little: what matters is whether the quote includes the window, the flashing, safe access and waste removal, all set against the same scope.
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Frequently asked questions
How much does it cost to fit a skylight in the UK?
Typically around £900–£2,600 per unit installed, including supply and labour, with a standard mid-range Velux roof window averaging about £1,100 fitted. The figure depends on the unit, roof type and access.
How much is the labour to fit a skylight?
Labour for a straightforward fit on an accessible pitched roof is usually £300–£600 per window. Awkward access, a flat roof or two-storey work adds time and may need scaffolding.
Why is the price range so wide?
Because units and roofs differ. A small fixed rooflight on an accessible roof is far cheaper than a large opening unit two storeys up that needs scaffolding. A measured quote gives the accurate number for your home.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific property. They are guidance, not a quotation.