UK grants for new double glazing (2026)
Every 2026 UK grant, loan, and funded scheme that can help pay for new windows — with eligibility, application routes, and when each is worth pursuing.
Quick eligibility checker
You may qualify for fully or partly funded new windows if any of these apply:
- You receive Universal Credit, Pension Credit, Income-related JSA/ESA, Housing Benefit, Income Support, Working Tax Credit, or Child Tax Credit
- Your home has an Energy Performance Certificate (EPC) rating of D, E, F or G
- You’re classed as fuel-poor (spending over 10% of income on energy)
- Someone in your household has a health condition aggravated by cold
- You live in Scotland (regardless of income — interest-free loans available)
The 4 schemes at a glance
| Scheme | Where | Means-tested? | Typical funding |
|---|---|---|---|
| ECO4 | England, Wales, Scotland | Yes (benefits) | Fully funded for qualifying households |
| Home Energy Scotland | Scotland only | No (all homeowners) | Interest-free loans up to £15,000 |
| Nest scheme | Wales only | Yes (benefits) | Fully funded upgrades including some glazing |
| Warm Home Discount | UK-wide | Yes (low income) | £150 off energy bill (signals ECO4 eligibility) |
Which scheme should you apply for first?
If you’re in England
Start with ECO4. It’s the only scheme that can fully fund double glazing in England. If you don’t qualify for ECO4, you’ll need to pay yourself — compare quotes via Findfitter to keep the cost down.
If you’re in Scotland
Start with Home Energy Scotland — any Scottish homeowner can apply for an interest-free £15,000 loan, no means-testing. If you’re also on qualifying benefits, check ECO4 eligibility alongside (the two can sometimes be combined for different measures).
If you’re in Wales
Start with the Nest scheme (Welsh Government funded). If not eligible, you can also check ECO4 — it runs in Wales alongside Nest.
If you’re in Northern Ireland
NI has its own Energy Advice Line schemes — the Affordable Warmth Scheme and Boiler Replacement Scheme. Glazing isn’t typically directly funded but installers can advise on wider energy-efficiency grants. Contact NI Energy Advice Line on 0800 111 4455.
Bonus: Warm Home Discount — often confused with a grant
The Warm Home Discount is a £150 rebate on your energy bill — not a grant for new windows. It’s worth knowing about because qualifying for Warm Home Discount is often a useful signal that you’ll qualify for ECO4 as well.
If none of these apply — how to save anyway
Most UK homeowners don’t qualify for grant-funded windows but still save significantly by comparing quotes. The typical £2,000-£4,000 spread between cheapest and most expensive quote for identical spec is a real saving — similar to partial ECO4 contribution.
Findfitter matches you with 4 FENSA-registered installers in your postcode in 2 minutes. Free, no obligation, no grant-application paperwork needed.
Frequently asked questions
Is there any UK grant that gives everyone free windows?
No. Every UK grant scheme requires either means-testing (ECO4, Nest, Warm Home Discount) or is a loan rather than a grant (Home Energy Scotland). The closest thing to “free windows for all” is Home Energy Scotland’s 0% interest-free loan — not free, but no interest cost either.
Can I combine multiple schemes?
Sometimes. ECO4 + Home Energy Scotland can be combined if you use each for a different measure (e.g. ECO4 for insulation, HES loan for windows). ECO4 and Nest cover similar measures so can’t usually be stacked. Always check with the scheme administrator before assuming eligibility.
How long does a grant application take?
ECO4: 4-8 weeks from application to installation. Home Energy Scotland loan: 2-4 weeks approval, then shop for installer. Nest: 4-8 weeks. Busier periods (October-January) extend these.
Are there any 2026 grant changes I should know about?
ECO4 runs to March 2026, with a proposed ECO5 replacement under government consultation — don’t wait to apply if you’re eligible now, as transitions between schemes typically cause delays. Home Energy Scotland loan caps and terms are reviewed annually; current terms to £15,000 are confirmed for 2026.
What if I rent — can I get grants?
Tenants can’t typically apply for most schemes directly — the landlord must apply. Landlords are eligible for ECO4 if the property has a D-G EPC rating and they commit to maintaining it as a rental. Encourage your landlord to check; there’s no cost to applying.
Sources & official information
From homeowners like you
Saved £3,700 compared to the first big-name quote I got. Same A+ spec, same 10-year insurance-backed guarantee — half the price from a FENSA fitter 4 miles away. Wish I'd done this years ago.
Replaced 3 windows and the front door after our L-postcode terrace survey. The FENSA installer spotted a lintel issue the others missed and priced the proper fix in. Job done.
Sheffield S11 semi, 7 windows, aluminium. Saved £1,850 vs the chain quote. FENSA certificate arrived by email a week later — exactly as promised.