The short answer
EWI is a qualifying measure under the UK's main insulation grant schemes, so eligible households can have part or all of the cost funded. ECO4, the largest scheme, was extended to 31 December 2026 and is aimed at owner-occupiers and tenants on means-tested benefits (such as Universal Credit or Pension Credit) whose home has a lower EPC rating. The Great British Insulation Scheme (GBIS) opened EWI to a wider group in lower council-tax bands and did not require benefits, though it closed to new applications in March 2026. The government's Warm Homes Plan, including the Warm Homes Local Grant delivered through councils, is set to succeed both, with funding reported at up to £15,000 per household for fuel-poor homes. Eligibility and scheme dates change, so check the current position before relying on any figure.
Grants can turn a five-figure EWI bill into a much smaller one, or fully fund it, where you qualify. Schemes and dates do change, so the summary below is a starting point — confirm the live position on GOV.UK and with an installer before you commit.
The schemes in brief
- ECO4to 31 Dec 2026; means-tested benefits
- GBISwider eligibility; closed Mar 2026
- Warm Homes Plansucceeds ECO4/GBIS; via councils
- Warm Homes Local Grantreported up to £15,000 / home
- EWI statusa qualifying insulation measure
Who qualifies, and for which scheme
ECO4 eligibility is led by means-tested benefits — Universal Credit, Pension Credit, Income Support and similar — with owner-occupied homes also needing a lower EPC band (typically D to G). It can fund several measures together, such as insulation plus heating upgrades. The Great British Insulation Scheme was broader: it covered homeowners and private tenants in lower council-tax bands with a lower EPC, and did not require benefits — but it closed to new applications in March 2026. Looking ahead, the Warm Homes Plan and the council-delivered Warm Homes Local Grant are intended to be the main route, targeting fuel-poor households.
| Scheme | Who it targets | Status (2026) |
|---|---|---|
| ECO4 | Means-tested benefits + lower EPC | Extended to 31 Dec 2026 |
| GBIS | Lower council-tax bands, lower EPC | Closed to new applications Mar 2026 |
| Warm Homes Plan / Local Grant | Fuel-poor households, via councils | Succeeding ECO4 and GBIS |
Scheme rules and dates change — confirm the current position on GOV.UK. Sources: GOV.UK and Ofgem.
How EWI fits in as a measure
External wall insulation is treated as a single measure within these schemes and is often paired with others on solid-wall homes, which are among the least energy-efficient. Funded work must usually be carried out to PAS2035 standards by a TrustMark-registered installer with a retrofit coordinator overseeing the project — the same quality framework that protects you against poor installation. If a scheme funds your EWI, that PAS2035/TrustMark route is normally a condition, not an optional extra.
Want to check grant-funded EWI?
We'll match you with a PAS2035/TrustMark EWI installer who can assess your eligibility for current schemes and quote on a clear specification, with any funding applied.
Frequently asked questions
Can I get a grant for external wall insulation?
Often yes, if you qualify. EWI is a qualifying measure under ECO4, which was extended to 31 December 2026 for households on means-tested benefits with a lower EPC rating, and was covered by the Great British Insulation Scheme before it closed in March 2026. The Warm Homes Plan is succeeding these schemes.
What is the difference between ECO4 and GBIS?
ECO4 is led by means-tested benefits and a lower EPC, and can fund several measures together. GBIS was broader — it covered lower council-tax bands without requiring benefits — but closed to new applications in March 2026. Both treated EWI as a qualifying measure.
Does grant-funded EWI have to be PAS2035 and TrustMark?
Generally yes. Funded insulation work is normally required to be carried out to PAS2035 standards by a TrustMark-registered installer with a retrofit coordinator, which is also the quality framework that helps protect you from poor installation.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific property. They are guidance, not a quotation.