A standard white uPVC casement window costs between £375 and £500 fitted in 2026, and replacing every window in a typical 3-bed semi costs £3,500 to £4,800. Before you spend a penny, it is worth checking whether you qualify for funding towards the cost: our 60-second funding checker tells you straight away.
This guide breaks down typical 2026 guide prices for every common uPVC window style and size, gives whole-house examples, explains what pushes the price up or down, and shows you the smartest ways to cut the bill.
uPVC window prices by style
The style of window you choose is the single biggest price factor. The figures below are typical 2026 guide prices for a fitted window of around 100cm x 100cm, in plain white uPVC with standard A-rated double glazing and no extras.
| Window style | Typical fitted price (2026) | Notes |
|---|---|---|
| Casement | £375 to £500 | The most popular and most affordable style |
| Flush casement | £450 to £650 | Sits flush with the frame for a traditional look |
| Tilt and turn | £565 to £725 | Opens inwards two ways, easy to clean |
| French casement | £600 to £875 | Two side-by-side openers with no central post |
| Sash (vertical slider) | £725 to £950 | Period look, more complex mechanism |
| Bay (three sections) | £1,500 to £3,000 | Priced per bay, rises with extra sections |
All prices in this guide are typical 2026 guide prices including installation. Your exact quote will depend on your property, your location and the installer you choose. If you want a deeper look at the most popular style, see our guide to casement windows, and for the priciest, our bay window guide.
uPVC window prices by size
Size is the next biggest factor. Bigger windows use more uPVC and more glass, and they take longer to fit. Using a white casement window as the benchmark:
| Window size | Typical fitted price (2026) |
|---|---|
| Small (60cm x 90cm) | £300 to £425 |
| Standard (100cm x 100cm) | £375 to £500 |
| Large (120cm x 120cm) | £475 to £650 |
| Extra large (180cm x 120cm) | £600 to £850 |
Whole-house cost examples
Most installers price whole-house jobs more keenly than single windows, because the scaffolding, travel and survey costs are spread across the job. Typical 2026 guide prices for full replacement with white uPVC casement windows:
| Property type | Windows | Typical fitted price (2026) |
|---|---|---|
| 2-bed flat | 4 | £1,700 to £2,400 |
| 2-bed terrace | 6 | £2,600 to £3,600 |
| 3-bed semi | 8 | £3,500 to £4,800 |
| 3-bed detached | 10 | £5,200 to £6,000 |
| 4-bed detached | 12 | £6,200 to £7,500 |
Add roughly 10 to 25 per cent to these totals if you mix in sash windows, bay windows or coloured frames.
Could you qualify for funding towards new windows and doors? Homeowners with windows five years old or older can check in under 60 seconds. Launch the funding checker.
What affects the price of uPVC windows?
Glazing specification
Standard double glazing is included in the prices above. Acoustic glass, obscured glass for bathrooms, patterned or leaded designs, and enhanced-security laminated panes all add to the cost. Low-E coatings and argon-filled units are now standard on most A-rated windows.
Colour and woodgrain foils
Plain white is the cheapest finish. Anthracite grey, black, cream and woodgrain foils typically add 10 to 25 per cent per window, and dual-colour frames, with a different finish inside and out, sit at the top of that range.
Energy rating
Window energy ratings run from A++ downwards. Most quality installers now fit A-rated windows as standard. Upgrading to A++ costs more per window, and the extra saving on heating bills is modest, so weigh it carefully.
Installation and access
Ground-floor windows with easy access are the cheapest to fit. Upper floors that need scaffolding or towers, older properties that need frame adjustments or lintel work, and homes in higher-cost areas such as London and the South East all push the installed price up.
Double or triple glazing?
Triple glazing typically adds 20 to 40 per cent to the price of each window. It retains more heat and cuts more noise, but modern A-rated double glazing already performs well, so for most UK homes the extra spend takes a long time to pay back. Our full double vs triple glazing comparison weighs up when it is worth it.
How to cut the cost of new uPVC windows
1. Check for grants and funding first
Before comparing quotes, check whether you qualify for the Help 2 Buy Windows grant. Qualifying homeowners can have some or all of the cost of new windows and doors covered, with no upfront cost. The Help 2 Buy Windows grant has nothing to do with the UK government; it is funded 100% by Help 2 Buy Windows through the sale of leads to our clients. Read how to qualify, or go straight to the funding checker.
2. Keep the specification simple
White casement windows in standard sizes are the cheapest route to A-rated double glazing. Every upgrade, coloured foils, premium handles, decorative glass, adds up across a whole house.
3. Replace the whole house in one job
Per-window prices fall noticeably on multi-window jobs. As a rule of thumb, four casement windows fitted together cost around £1,700 to £2,000, while the same windows priced individually would cost more.
4. Compare at least three written quotes
Prices for identical specifications vary widely between installers. Get every quote in writing, itemised, and check the installer is registered with a competent person scheme such as FENSA or Certass. If you are researching prices before speaking to anyone, our guide to buying double glazing online covers how online prices compare.
Frequently asked questions
What is the average cost of uPVC windows in 2026?
A standard white uPVC casement window around 100cm x 100cm typically costs £375 to £500 fitted in 2026. Tilt and turn windows average £565 to £725, and uPVC sash windows £725 to £950. Bay windows are the most expensive style, usually £1,500 to £3,000 fitted depending on the number of sections.
How much do uPVC windows cost for a 3-bed house?
Replacing all eight windows in a typical 3-bed semi with white uPVC casement windows costs around £3,500 to £4,800 fitted in 2026. A larger 3-bed detached house with ten windows is usually £5,200 to £6,000. Mixing in sash or bay windows, or choosing coloured frames, pushes the total higher.
Are grey or anthracite uPVC windows more expensive?
Yes. Coloured and woodgrain foil finishes such as anthracite grey typically add 10 to 25 per cent to the price of a white uPVC window. Dual-colour frames, with a different finish inside and out, sit at the top of that range because the foil is applied to both faces.
What is the cheapest way to buy uPVC windows?
Stick to white uPVC casement windows in standard sizes, avoid decorative glass and premium hardware, and compare at least three written quotes from accredited installers. Before you pay anything, check whether you qualify for funding: the Help 2 Buy Windows grant can cover some or all of the cost for qualifying homeowners.
Is triple glazing worth the extra cost over double glazing?
Triple glazing typically costs 20 to 40 per cent more than double glazing. It offers better heat retention and noise reduction, but modern A-rated double glazing already performs well, so the payback period on the extra spend is long for most UK homes. It makes most sense on exposed properties or noisy roads.