2026 Double Glazing Prices UK
Real 2026 installed prices for uPVC, aluminium and timber double glazing — from single replacement windows to whole-house quotes, with no door-to-door inflation.
Typical UK double glazing prices
Installed & supplied, including VAT. Per-window or whole-house packages.
Prices include VAT & standard installation. Your exact quote will reflect your property & postcode.
What affects double glazing prices?
The six biggest factors that push your window quote up or down.
Frame material
uPVC is the cheapest. Aluminium adds ~60%. Timber adds ~130% but lasts longest in listed properties.
Window size & style
Bay windows and sash windows cost more due to larger frames and specialist fittings.
Glass spec
A-rated glass is standard. A++ or triple glazing adds £80–£200 per window but reduces condensation and noise.
Colour & finish
Anthracite grey, black and foiled woodgrain finishes add 5–15% on uPVC.
Access
First-floor and higher windows need scaffolding or cherry-pickers, adding £200–£600.
Region
London/SE typically 20% above national average. Scotland & NE below.
How much does double glazing cost in 2026?
The average UK homeowner pays £4,850 to double-glaze an 8-window home in uPVC. Aluminium runs around £8,000, and timber around £10,500 for the same house.
Per-window, expect £350–£550 for uPVC casement, rising for sash, bay and larger units.
uPVC vs aluminium vs timber
- uPVC — cheapest, 20-year lifespan, low maintenance. Good for most homes.
- Aluminium — slimmer sightlines, modern look, 30+ year lifespan. Best for contemporary builds.
- Timber — traditional, period-correct, requires repainting every ~8 years. Required for many listed properties.
Energy savings explained
Upgrading from single to double glazing saves the average semi around £195/year on energy bills. A-rated glass (standard now) outperforms older C-rated units by ~20%.
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