DATA-BACKED GUIDE · UPDATED JULY 2026
How much do new windows cost for a whole house in the UK?
Replacing every window in a house is one of those jobs where the quotes can swing wildly from one firm to the next. The number depends on how many openings you have, the frame material and whether you need any building work around the reveals. The real prices below come from actual prices, so you can see what people genuinely paid rather than a sales brochure estimate.
The quick version
- The headline figure is mostly driven by window count, size and frame material, not the brand name on the glass.
- uPVC tends to be the cheapest route, with aluminium and timber costing more to supply and fit.
- Fitting a whole house at once usually works out better per window than doing them one at a time.
- Check the installer is FENSA or CERTASS registered so the work is signed off for building regs.
What people actually paid
Real prices, in people's own words
- £3,800“They have charged us £3800 for 9 windows”
- £6,000“7 windows here, plus a bay which counts as 3, and a front door came in at around £6K”
- £8,000“settled c. 8k”
- £8,500“I recently spent £8.5k on my house but I have 10 windows and 3 doors”
- £9,000“got 8 windows (one bay) and two external doors for £9k”
- £10,700“I had my whole house done...for £10,700”
Genuine amounts posted publicly. We publish the price and the quote, never the person.
Why the price varies so much
No two houses price the same because the count and size of openings differ so much. A small terrace with six standard casements is a very different job to a bay-fronted semi with a dozen larger units and an awkward first floor. Frame material moves the number a lot too: uPVC sits at the lower end, aluminium and timber sit higher. Then there is the state of the existing reveals. If the old frames have been letting water in, or the lintels need attention, the labour climbs. Glass spec matters as well, since acoustic or triple glazing costs more than standard double units. Access plays a part, because upper-floor windows over a conservatory or a busy road can need extra scaffolding or a longer day. All of this is before VAT, which on most window work is charged at the standard 20%.
How to pay less
- Get at least three quotes. Window pricing is famously flexible, so competing numbers give you real leverage.
- Do the whole house in one visit rather than a couple at a time, as the setup and travel are shared across more units.
- Be wary of a big opening price with a same-day discount. A firm that drops thousands on the spot had room to move all along.
- If you pay a deposit, putting it on a credit card can give you Section 75 protection on a larger job should the firm fold before fitting.
Common questions
Is uPVC or aluminium cheaper for new windows?
uPVC is normally the more affordable option to supply and fit, which is why it is the most common choice. Aluminium and timber frames look great and can last well, but they push the total up. The real prices below reflect the mix of materials people actually chose.
Do I need building regulations approval for new windows?
Replacement windows do need to meet building regs, but you can avoid a separate council application by using an installer registered with FENSA or CERTASS. They self-certify the work and send you a certificate, which you will want when you come to sell.
Why are the quotes I am getting so different?
Frame material, glass spec, the number of openings and the condition of your reveals all move the price. Sales tactics add another layer, since some firms open high and discount hard. Comparing several quotes against the real price data below is the quickest way to spot an outlier.