Short answer: a typical Velux window install in Staffordshire in 2026 costs between £800 and £2,200 fitted, depending mainly on whether scaffolding is needed and whether you’re replacing an old unit or fitting a new one. Velux included during a full re-roof can be as low as £600 per window because no extra scaffolding is required.
The longer answer is what this article covers. We install and replace Velux windows across Staffordshire every week, and the question we get asked most often by homeowners getting quotes is some version of: “Why does one quote say £900 and another say £2,400 for what looks like the same job?”
The honest answer is that they’re usually NOT the same job — even though the customer thinks they are. Below we’ll walk through every variable that moves a Velux installation price up or down so you know what you’re actually paying for, and what to look out for when you’re comparing quotes.
The headline numbers — Velux costs at a glance (2026, Staffordshire)
£800 – £1,200
One-day job. New window, manufacturer flashing kit, all materials and labour included. No internal plasterwork required.
£1,200 – £1,800
Same job as above, but with a scaffold. The scaffolding alone is usually £400 – £600 of the total.
£1,400 – £2,200
Cutting a new opening, trimming rafters, modifying the breather membrane, fitting battens, the window itself, manufacturer flashing kit, and any internal making-good around the reveal.
£600 – £1,000 per window
The cheapest moment to add a Velux. Tiles are off, scaffolding already up. If you’re booking a re-roof, this is when to do it.
£350 – £600
For leaking Velux complaints where the window itself is fine. In 8 of 10 cases the leak is a worn-out or wrong flashing kit, not the window.
£700 – £1,400
Often the right answer where a full Velux isn’t practical — small landings, internal bathrooms, or in conservation areas where a visible Velux would be refused.
What actually moves the price up or down
Six variables matter most. In rough order of how much they affect the final price:
1. Is scaffolding required?
This is the single biggest variable. Building Regs and HSE working-at-height rules mean that for most Velux work above a single-storey extension, the installer needs a scaffold (or in some cases a tower) for safe working. That scaffold typically costs £400 – £800 for a domestic Velux job.
If your Velux is over a single-storey rear extension and we can reach it from a ladder or tower — no scaffold needed, several hundred pounds saved. If it’s two storeys up on the front of the house — scaffolding required, that £400 – £800 is in your quote.
What to watch for: if a quote is suspiciously cheap on a two-storey job, it might be because the installer is planning to work without proper scaffolding. That’s a real safety risk — and if anything happens on your property, their public liability insurance may not cover it.
2. Replacement vs new install
Replacing an existing Velux into the same opening is much cheaper than cutting a brand-new opening. The reasons:
- No timber rafter trimming required
- No internal plasterboard or reveal making-good
- No breather membrane cutting and re-lapping
- Often no scaffolding needed (if access is OK)
- Usually a one-day job versus two days for a new install
Like-for-like replacement is typically £800 – £1,200 all in. New installation £1,400 – £2,200. The difference is real work — not a margin grab.
3. The model of Velux you choose
Velux’s model lineup, simplified:
- Velux GGL (pine finish) — the standard manual top-hung. The default choice for most installs. The unit itself costs £200 – £450 depending on size.
- Velux GGU (white polyurethane finish) — same as GGL but with a moisture-resistant white finish. Better for bathrooms and kitchens. About £50 – £100 more than GGL.
- Velux GPL/GPU (top-hung, pivot-and-tilt) — opens further than the standard pivot. Better for unobstructed views. £100 – £200 more than GGL.
- Velux INTEGRA (electric or solar-powered) — opens and closes by remote control or app. Adds £300 – £600 to the unit cost. Includes rain sensor that auto-closes if it starts raining — genuinely useful.
- Velux Conservation models (e.g. GGL CK04 Conservation) — central glazing bar and dark cladding designed to look more like a traditional rooflight. Required by many Conservation Officers in listed and conservation-area property. Adds £200 – £400 to the cost over the standard equivalent.
- Velux Cabrio — opens to form a balcony. Niche but striking. Substantially more expensive (£3,000 – £5,000 fitted) and a much bigger structural job.
4. The size you need
Velux sizes are coded — CK02, MK04, MK06, UK08 and so on. Bigger sizes cost more (the glass and frame are larger) and usually need a larger opening, which means more rafter trimming and more flashing kit. A small CK02 (about 55 x 78 cm) might be £200 for the unit; a large UK08 (about 134 x 140 cm) is £400 – £500 just for the window. Across the whole installed price, the difference between small and large is typically £200 – £400.
5. Whether you need the right flashing kit
The Velux flashing kit is the metal trim around the window that integrates with your roof covering. It’s the most important detail for keeping the window watertight — and the most common place corners get cut by cheap installers.
- EDW — for standard interlocking tiles. The most common kit.
- EDN — for slate or thin tile.
- EDJ — recessed kit, sits the Velux flush with the surrounding tiles. More expensive but neater.
- EDS — for low-pitch roofs.
- EBW — for combined installations (two or more Velux side by side).
A genuine Velux flashing kit is £80 – £180 depending on size and type. A cheap aftermarket “Velux-compatible” generic kit might be £30 – £50. The cheap kits cause leaks. Always specify the correct genuine Velux kit when you accept a quote.
6. Conservation area or listed building requirements
If you’re in a Lichfield conservation area, or your property is listed, Velux work needs Listed Building Consent or Conservation Area Consent before any work starts. The Conservation Officer will usually require a Velux Conservation model with conservation flashing — which adds £200 – £400 to the cost — and may restrict you to rear or hidden roof slopes only. The consent application itself is free; preparing the supporting method statement and material specification we include in our quote.
For more on the Lichfield consent process, see our guide to listed building and conservation area roofing in Lichfield.
What about VAT?
Repair and replacement work on existing windows is standard-rated for VAT (20%). The VAT zero-rating that used to apply to alterations to listed buildings was abolished in 2012, so there are no VAT savings on Velux work to listed property either. The prices we’ve quoted above are inclusive of VAT.
Should I DIY a Velux replacement?
Honest answer: probably not. We see DIY Velux installs and replacements every week — usually after they’ve started leaking. The most common DIY mistakes:
- Wrong flashing kit for the tile/slate profile (visible water track marks within a year)
- Breather membrane not properly cut and re-lapped at the head — water gets under the membrane
- Sash gasket not seated correctly — condensation between panes
- Working without scaffolding — genuine fall risk on anything above a single storey
Replacing a like-for-like Velux into an existing opening on a single-storey extension where you can stand securely is doable for a confident DIYer. Anything else — call a professional. The cost saving of DIY is usually wiped out by a single leak repair within five years.
What’s the cheapest way to get Velux fitted?
If you’re considering both a re-roof AND new Velux windows, do them together. A Velux added during a full re-roof is typically £600 – £1,000 because:
- The tiles are already off
- The scaffolding is already up
- The breather membrane is being installed anyway, so it can be detailed around the new Velux at no extra cost
- One day’s labour covers both the roof work and the Velux fitting
Compared to retrofitting the same Velux a year later (which would need its own scaffold, tile removal and reset, breather membrane modification etc.) you save 40-60% on the per-Velux cost.
If you’re at all undecided about whether to add roof windows during a re-roof, our advice is: add them now. Even if you’re not 100% sure you want one, the cost gap between “now” and “later” is large enough to justify it.
Final notes
Every job is different and every quote should be based on a proper survey of your specific roof. If you’d like a free, no-obligation Velux survey and written fixed-price quote on your Staffordshire property, you can request one here. For Lichfield property specifically — including listed and conservation area work — see our Lichfield Velux page.
And if your existing Velux is leaking, before you commit to a full replacement, ask for a flashing-kit-only quote first. As we mentioned earlier — 8 out of 10 leaking Velux complaints are flashing kit problems, not the window itself, and a flashing-only replacement is £350 – £600 versus £800+ for a full window replacement.
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