The short answer
A Velux roof window typically costs £330–£550 supply-only for a small centre-pivot, £500–£900 for a mid-size unit, and £1,000–£3,500 for a large or Cabrio balcony unit. Fitted, most standard Velux windows come in around £900–£2,500 all-in, with a mid-range unit averaging about £1,100 supply and fit. On top of the window, expect labour of roughly £300–£600, a flashing kit at £80–£180, and around £500 if third-party scaffolding is needed. "Velux" is a brand name often used loosely for any roof window — a like-for-like generic rooflight can be cheaper, but the fitting cost is broadly the same.
Velux is the best-known roof-window brand, so its name is often used for any rooflight. Here is what the genuine units cost, supply-only and fitted, and what sits on top.
Typical Velux costs
- Small centre-pivot (supply)£330–£550
- Mid-size (supply)£500–£900
- Large / balcony (supply)£1,000–£3,500
- Standard unit, fitted~£1,100
- Most units, fitted all-in£900–£2,500
Supply cost by size
Velux prices step up with size and function. A small centre-pivot window of the kind used in lofts is the lowest-priced, while top-hung and electric units cost more, and large balcony or Cabrio units sit at the top. Supply-only, that spans roughly £330 for a small manual unit to £3,500 for a large balcony option — so the window alone can be a small or a large part of the total, depending on what you choose.
| Velux unit | Typical supply-only | Use |
|---|---|---|
| Small centre-pivot | £330–£550 | lofts, smaller rooms |
| Mid-size top-hung | £500–£900 | rooms, better headroom |
| Large roof window | £1,000–£2,500 | bigger openings |
| Balcony / Cabrio | £2,500–£3,500 | feature openings |
Indicative supply-only figures for guidance. Sources: Roofing Superstore and MyJobQuote price guides.
What the fitted price includes
The fitted cost adds labour (£300–£600 per window for a straightforward pitched-roof fit), a flashing kit to weatherproof the unit (£80–£180), and scaffolding if a safe platform is needed (around £500). A standard Velux therefore lands around £900–£2,500 fitted, with about £1,100 a fair mid-range figure. Replacing a tired Velux for the same size is usually at the lower end, because the opening already exists.
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Frequently asked questions
How much does a Velux window cost supply-only?
Roughly £330–£550 for a small centre-pivot, £500–£900 for a mid-size unit, and £1,000–£3,500 for a large or balcony unit. Function and size are the main drivers.
How much does a Velux cost fitted?
Most standard Velux windows come in around £900–£2,500 fitted, with a mid-range unit averaging about £1,100 supply and fit, before scaffolding if it is needed.
Is a Velux more expensive than a generic roof window?
The genuine Velux brand can cost more than a like-for-like generic rooflight, but the fitting cost is broadly the same. Compare on the same size, function and whether the price is supply-only or fitted.
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.