Great British Insulation Scheme (GBIS) — 2026 Guide
The Great British Insulation Scheme (GBIS) was designed to bridge the gap between ECO4 (for low-income households) and the general public — targeting the "squeezed middle" who own or rent poorly-insulated homes but don't qualify for income-based schemes. It focuses exclusively on insulation measures.
- Focus
- Insulation only
- Where
- England
- Target
- Bands A–D (or E–G, EPC D or below)
- Income test
- Not strictly required
Who is eligible?
GBIS operates on a two-track eligibility system:
General group
Owner-occupiers or private renters in council tax bands A–D (England) with an EPC rating of D or below. No income test required.
Low income group
Households in bands E–G receiving certain means-tested benefits, OR households referred by their local authority. Broader EPC eligibility.
What does GBIS cover?
- Loft insulation (including top-up of existing thin insulation)
- Cavity wall insulation
- Solid wall insulation (internal or external)
- Underfloor insulation
- Flat roof insulation
- Park home insulation
- Room-in-roof insulation
How to apply
- 1Find a TrustMark-registered installer who delivers GBIS measures.
- 2The installer checks your eligibility (council tax band, EPC rating, and benefit status if applicable).
- 3A survey is carried out to determine the right measure for your home.
- 4Works are arranged — you may pay a contribution depending on your eligibility group.
2026 status
GBIS was scheduled to run until March 2026. Check gov.uk for the latest status and any successor scheme. Insulation funding remains a government priority and replacement programmes may be in place.
Common questions about Great British Insulation Scheme
What is the difference between GBIS and ECO4?
ECO4 targets the most vulnerable and lowest-income households and covers a broad range of measures including heat pumps. GBIS targets the 'squeezed middle' — people who don't qualify for ECO4 but still live in poorly-insulated homes. GBIS only covers insulation, not heating systems.
Do renters qualify for GBIS?
Yes, private and social renters can qualify. However, insulation measures that permanently alter the property structure (such as solid wall insulation) generally require landlord consent.
Is GBIS completely free?
For the low-income group, works are typically fully funded. The general group (bands A–D) may need to make a contribution towards the cost. The exact amount depends on the measure and your specific circumstances.
What council tax band do I need to be in?
The general eligibility route requires council tax band A–D in England. Households in bands E, F or G can still qualify via the low-income route if they receive means-tested benefits.
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