Interactive calculator with real prices adjusted by UK region. Select your scope, pick your region, get your instant estimate.
1. Choose Scope of Work
2. Select Your Region
What Affects the Cost?
Window style
Frame material
Glass specification
Number of windows
Access and scaffolding
Listed building constraints
Frequently Asked Questions
How much do new windows cost UK?
A standard uPVC casement window costs £300-£600 installed. Bay windows cost £800-£1,800. A full set of windows for a 3-bed house costs £3,500-£7,000 in uPVC.
How long do uPVC windows last?
Quality uPVC windows last 20-35 years. Timber windows last 30-60 years with maintenance. Aluminium windows last 40-50 years. The glass units may need replacing sooner if seals fail (10-20 years).
Are aluminium windows worth the extra cost?
Aluminium windows cost 50-80% more than uPVC but offer slimmer frames, more glass area, better aesthetics, and longer lifespan. They are popular for modern homes and extensions.