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Double Glazing Cost Calculator
Get an instant, detailed cost estimate for double glazing your entire home. Compare materials, window types, and see a full price breakdown — no email required.
Estimated total (inc. VAT)
£2,534
4 windows · uPVC · Double glazing
Double Glazing Costs UK 2026: Everything You Need to Know
Double glazing is one of the most impactful home improvements you can make. It reduces heat loss by up to 50%, cuts noise pollution, improves security, and adds value to your property. Our free double glazing cost calculator above gives you an instant, personalised estimate based on 2026 UK pricing data.
Average Double Glazing Prices by Material
These prices are based on standard-sized casement windows with A-rated double glazing units, including professional installation and VAT. Prices vary by region — our calculator above adjusts for your location automatically.
You May Qualify for Free Double Glazing
Government grants can cover up to 100% of double glazing costs. The ECO4 scheme provides up to £14,000 and the new Warm Homes Plan offers up to £15,000. Check your eligibility here.
What Affects Double Glazing Cost?
Several factors determine the final price of double glazing:
- Frame material — uPVC is the most affordable; timber is premium
- Window type — Sash windows and bay windows cost more than standard casement windows
- Size — larger windows cost 40%+ more than small windows
- Glazing spec — triple glazing adds £200+ per window
- Region — London prices are typically 15-20% higher than the national average
- Installation complexity — structural work or difficult access increases cost
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Frequently Asked Questions
How much does double glazing cost in the UK in 2026?
Double glazing costs typically range from £350-£500 per uPVC window (fitted), £600-£850 for aluminium, and £950-£1,400 for timber. A full house (8-10 windows) in uPVC costs £4,000-£6,000. Use our calculator above for a personalised estimate based on your exact window configuration.
How much does it cost to double glaze a 3-bed house?
For a typical 3-bedroom semi-detached house requiring 8-10 windows, uPVC double glazing costs approximately £4,000-£6,000 fully fitted including VAT. Aluminium frames increase this to £7,000-£10,000, while timber costs £10,000-£16,000.
Is double glazing worth the investment?
Yes. Double glazing saves £150-£350 per year on energy bills, adds 5-10% to your property value, reduces noise by up to 80%, and improves security. With a 20-30 year lifespan, the typical payback period is 10-15 years.
Can I get double glazing on a government grant?
Yes. The ECO4 scheme can cover up to £14,000 and the Warm Homes: Local Grant offers up to £15,000 for eligible households. Check your eligibility with our Window Grants Checker.
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