UK price guide · Updated 26 Sep 2026
Sash Window Prices
uPVC sash windows cost more than standard casements because of their sliding mechanism and traditional styling. Current fitted centres for common uPVC sash sizes are roughly £805–£1,062.
Current price examples
These examples come from the same pricing model used by the calculator. They are market estimates rather than binding installer quotations.
Material makes a big difference
uPVC is normally the lowest-cost sash option. Aluminium and engineered timber sit higher, while premium hardwood or heritage joinery can be substantially more expensive.
Triple glazing also adds a noticeable premium, and bespoke glazing bars or conservation details can widen the range further.
Check before comparing quotes
- Frame material
- Exact size
- Double or triple glazing
- Glazing bars, heritage details and finish
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 uPVC sash window?
A common 900×1200 white uPVC sash currently centres around £915 fitted in our model.
Are timber sash windows much more expensive?
Yes. Timber is a different manufacturing market and can cost substantially more than uPVC.
Does the price include fitting?
Yes. The examples are fitted-market prices including ordinary VAT.
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