UK price guide · Updated 26 Sep 2026
Casement Window Prices
Standard white uPVC casement windows are the baseline for most replacement-window jobs. A typical fitted centre ranges from about £345 for a small fixed window to around £670 for a large multi-section window.
Current price examples
These examples come from the same pricing model used by the calculator. They are market estimates rather than binding installer quotations.
Openers and layouts matter
An opening sash adds hinges, locks, handle hardware and extra fabrication. A top opener over a fixed pane can also cost differently from a simple side-by-side layout because the frame needs an extra transom.
The calculator therefore prices the number of sections and opening sashes separately, with a small additional allowance for more complex stacked layouts.
Common extras
- Coloured or wood-effect foil
- Triple, toughened or laminated glass
- Flush or heritage-style frames
- Extra openers and more complex pane layouts
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 is a standard uPVC casement window?
A medium 1200×1200 white uPVC window with one opener currently centres around £526 fitted in the national model.
How much extra is a second opener?
For the same 1200×1200 example, the model moves from roughly £526 with one opener to about £571 with two.
Does colour increase the price?
Usually. Coloured and wood-effect finishes carry an uplift compared with standard white.
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