UK price guide · Updated 26 Sep 2026
Window Replacement Cost UK
For a standard white uPVC replacement window, a typical fitted market centre is roughly £400–£670 per window before multi-window job savings. A whole project can cost less per window as the number of replacements increases.
Current price examples
These examples come from the same pricing model used by the calculator. They are market estimates rather than binding installer quotations.
What changes replacement window cost?
Window size and opening layout are major drivers. A fixed light costs less than the same-size opening sash, while extra mullions, transoms and additional openers add fabrication and hardware.
Colour, triple glazing, flush or heritage frames and your region can also move the fitted price. Larger jobs normally gain some efficiency because survey, fitting and travel are spread across more windows.
What is included?
- Window supply
- Standard replacement fitting
- Ordinary removal and basic making good
- 20% VAT
What “fitted” means here: supply, standard replacement installation and ordinary 20% VAT are included. Unusual access, scaffolding, structural repairs, planning/listed-building requirements and highly bespoke work can sit outside the standard estimate.
Related price guides
Compare closely related products before using the calculator for your exact specification.
Questions people ask
Short answers to the most useful questions around this price topic.
How much does one replacement window cost?
A standard white uPVC window commonly centres around £400–£670 fitted in our current model, depending on size and opening layout.
Is it cheaper per window to replace several at once?
Usually, yes. Multi-window jobs are more efficient for survey, travel and installation, so the model applies a modest job-size saving.
Does the estimate include fitting?
Yes. These figures are fitted-market estimates rather than supply-only frame prices.
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