UPVC window installation specialists in London
Homeowners in London use Pro-Fit Window Systems to collect free UPVC window installation quotes from trusted local installers. Every company in our Greater London network is FENSA-registered and independently rated.
We connect you with up to 3 FENSA-registered UPVC window installation installers near London who will each provide a free, no-obligation quote. In London, comparing multiple quotes saves homeowners an average of £500–£1,500.
UPVC Windows prices in London 2026
We've compiled current installed price ranges for UPVC window installation in the Greater London area. Actual costs depend on window size and specification — compare quotes for a precise figure.
| Window Type | From (installed) | Up to (installed) |
|---|---|---|
| Casement (single) | £438 | £875 |
| Casement (large) | £625 | £1,125 |
| Sash Window | £750 | £1,375 |
| Bay Window (3-panel) | £1,500 | £4,000 |
| Tilt & Turn | £500 | £938 |
* Prices are estimates for London based on current market data. Your exact quote will depend on window size, specification and chosen installer.
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Get Quotes in London →FAQs — UPVC Windows in London
UPVC Windows prices in London — what should I budget?
In London, you can expect to pay from £438 for a standard casement window installed, up to £4,000 for a full bay window. Prices in Greater London are slightly above the national average. The best way to get an accurate price is to compare quotes from local FENSA-registered installers using our free tool.
How long does window installation take in London?
The time required depends on how many windows are being installed. In London, a single window can be replaced in 2–4 hours, while a whole-house installation typically takes 2–3 days. Your installer will confirm the schedule during their free property survey.
Are your London window installers FENSA registered?
Yes. Every installer in our London network is FENSA registered, which means they are certified to install replacement windows in compliance with UK Building Regulations. FENSA registration also provides a 10-year insurance-backed guarantee on all installations.
Do I need planning permission for new windows in London?
Most standard window replacements in London are covered by permitted development rights and require no planning application. If your property is listed or sits within a conservation area in Greater London, additional consent from the local council may be needed — your installer can guide you through this.