Great British Insulation Scheme – How to Qualify and Apply

The Great British Insulation Scheme (GBIS) is a government-backed initiative designed to help UK households improve their home energy efficiency. Launched in spring 2023, the scheme provides free or subsidised insulation to properties that currently lack adequate thermal protection, targeting those most in need of support with their energy costs.

Running until March 2026, the programme delivers one insulation measure per household through registered energy suppliers operating under Ofgem oversight. The Department for Energy Security and Net Zero (DESNZ) holds policy responsibility for the scheme, which forms part of broader efforts to reduce carbon emissions and help households manage rising energy bills.

Eligibility extends across England, Scotland, and Wales, though Northern Ireland falls outside the scheme’s scope. Homeowners, private tenants, and in some cases social housing residents can access support, provided their properties meet certain energy performance criteria and either receive qualifying benefits or fall within specific income thresholds.

What is the Great British Insulation Scheme?

The Great British Insulation Scheme represents a £1 billion commitment over three years to improve energy efficiency in UK homes. It addresses a critical gap in thermal protection that leaves many households paying more than necessary for heating while contributing to carbon emissions.

The scheme focuses on delivering a single insulation measure per property, typically loft or cavity wall insulation where these are absent or insufficient. Unlike more comprehensive retrofit programmes, GBIS concentrates on this targeted intervention to maximise the number of homes that can receive support before the March 2026 endpoint.

• Phased rollout prioritising the most vulnerable households
• Administered directly through energy suppliers
• Can combine with other grants such as the Boiler Upgrade Scheme
• Expected to insulate hundreds of thousands of homes across the UK
• Works alongside the ECO4 scheme for households requiring broader support
• Providers assess both schemes simultaneously to match households with appropriate support
• Free initial checks available through registered installers

Who is eligible for the Great British Insulation Scheme?

Eligibility for GBIS divides into two distinct pathways, each with its own criteria. Understanding which pathway applies to your circumstances is the first step toward accessing support through the scheme.

Low-income pathway

The low-income route targets households receiving specific means-tested benefits or meeting income thresholds. Applicants must satisfy all of the following requirements:

• Be a homeowner or private tenant (with landlord consent for renters)
• Reside in a property with an EPC rating of D, E, F, or G for homeowners, or E, F, or G for private renters (D-G if exempt from Minimum Energy Efficiency Standards)
• Receive at least one qualifying benefit from the approved list
• Have a household gross annual income under £31,000 from all sources

Qualifying benefits include Universal Credit, Pension Credit (Guarantee or Savings credits), Income Support, income-based Jobseeker’s Allowance, income-related Employment and Support Allowance, Housing Benefit, Working Tax Credit, Child Tax Credit, and Child Benefit (subject to income caps).

Vulnerability provisions

Households with severe or long-term health conditions directly affected by cold homes can access support through NHS or local authority referral pathways. Conditions qualifying include cardiovascular diseases, respiratory conditions, limited mobility, and immunosuppression. This route operates independently of standard benefit receipts, allowing vulnerable households to receive assistance where standard criteria might not apply.

General eligibility pathway

The general route focuses on property characteristics rather than personal circumstances. Properties must hold an EPC rating of D through G (or D and below in some interpretations), and homeowners or private tenants must reside in council tax bands A to D in England or A to E in Scotland and Wales. Some sources indicate that private renters may face greater restrictions within this pathway.

Local Authority Flex

Local authorities can refer residents to the scheme who fall below the £31,000 income threshold or who face particular vulnerabilities related to cold homes. This flexibility allows councils to target support toward households they identify as most in need, even where standard eligibility pathways might not capture their circumstances.

How do I apply for GBIS?

The application process follows a straightforward pathway, though understanding the initial steps helps streamline the experience. Several routes exist for making contact with the scheme.

Starting your application

The primary route begins through gov.uk’s dedicated application portal, where applicants can check their eligibility and register their interest. Alternative routes include contacting energy suppliers directly, reaching out to local councils, or engaging with registered installers who can assess properties for both GBIS and ECO4 eligibility simultaneously.

Many installers offer free initial assessments that evaluate whether a property qualifies under either scheme. This approach often proves more convenient than navigating eligibility criteria independently, as installers handle much of the administrative process on behalf of households.

Property assessment

Once eligibility is confirmed, an energy supplier contacts the household to arrange a property assessment. The survey focuses on identifying insulation gaps, typically checking for properties with little or no existing insulation such as lofts with less than 100mm depth of material or homes without cavity wall insulation.

Properties meeting the criteria receive arrangements for a free or partially subsidised survey followed by installation of one insulation measure. The supplier coordinates the entire process from survey through installation.

Referral pathways

Local councils and NHS services can refer vulnerable households directly to the scheme through Local Authority Flex arrangements. These referral pathways bypass standard application routes and can accelerate access for households facing particular hardship or health vulnerabilities related to cold living conditions.

What measures does GBIS cover?

GBIS provides one insulation measure per household, focusing on the most impactful interventions where current insulation falls below acceptable standards. The scheme does not cover comprehensive retrofits but instead targets specific improvements that deliver meaningful thermal performance gains.

Loft insulation

Properties with less than 100mm of existing loft insulation typically qualify for top-up or full installation. Recommended depth reaches approximately 270mm to achieve optimal thermal performance. Installers assess the current state of loft spaces and determine whether the property would benefit most from new installation or additional material layered over existing insulation.

Cavity wall insulation

Homes with unfilled cavity walls can receive injection insulation to prevent heat loss through these gaps. Surveyors check property suitability, ensuring cavity walls exist and that filling them presents no risk of damp or other complications. Solid wall properties may receive different treatment depending on specific circumstances and available funding.

Relationship with ECO4

Providers assess households for both GBIS and ECO4 simultaneously. Where properties qualify for broader support under ECO4, installers can address multiple insulation needs or even support heating system upgrades. GBIS essentially serves as an entry point for properties that might not immediately qualify for the more comprehensive ECO4 programme while still delivering valuable improvements to thermal performance.

Scheme timeline and milestones

Understanding the scheme’s development helps contextualise its current status and future availability.

1. 2023 (Q1): Official announcement and pilot phase begins following the Supergreen Homes Plan framework
2. 2023 (Q3): Full national rollout commences with expanding supplier participation
3. 2024: Expansion to additional insulation measures and continued scheme growth
4. 2025: Continued operation with focus on maximising uptake before closure
5. March 2026: Planned scheme endpoint as confirmed in official documentation

The scheme remains active as of current search data, with availability confirmed through the March 2026 endpoint. No early closure has been announced, though household uptake rates and funding levels ultimately determine whether the timeline holds or adjustments become necessary.

What we know and what remains unclear

Transparency about the distinction between confirmed information and areas of uncertainty helps households make informed decisions. Households should verify their eligibility through Ofgem’s official resources or the gov.uk portal rather than relying on third-party interpretations that may not reflect current policy, and you can find out more about the Great British Insulation Scheme at dessert places near me.

Households should verify their eligibility through Ofgem’s official resources or the gov.uk portal rather than relying on third-party interpretations that may not reflect current policy.

How GBIS compares to ECO4

Understanding the relationship between GBIS and the Energy Company Obligation (ECO4) scheme helps households navigate their options and identify the most appropriate pathway for their circumstances.

GBIS focuses on a single insulation measure with broader property-based eligibility that includes council tax bands and EPC ratings without requiring benefit receipts. ECO4 provides more comprehensive upgrades including boilers and broader retrofit work but applies stricter income-based and benefit-related criteria. The schemes are not mutually exclusive, and installers assess both simultaneously to match households with appropriate support.

ECO4 runs beyond the March 2026 endpoint that closes GBIS, meaning households unable to access GBIS support or requiring more extensive improvements may find ECO4 offers a viable alternative where they meet the eligibility requirements.

Concerns and limitations

Several criticisms have emerged regarding the scheme’s implementation and scope. Awareness and uptake remain lower than anticipated despite relatively broad eligibility criteria, which some analysts attribute to limited promotion and public understanding of available support.

The restriction to one insulation measure prevents households from addressing multiple thermal performance issues in a single application. Properties requiring comprehensive improvements may find the single-measure limitation frustrating, particularly where several areas would benefit from insulation.

The distinction between GBIS and ECO4 creates confusion for some applicants, who struggle to understand which scheme applies to their circumstances and what support each programme provides. Some private renters report difficulties accessing support despite general pathway provisions suggesting eligibility.

Northern Ireland’s exclusion from the scheme leaves households in that region without access to equivalent support through this particular programme, creating a geographic gap in available assistance.

“The scheme is helping households save on their bills and cut emissions through energy efficiency improvements.”

— Official gov.uk guidance on the Great British Insulation Scheme

These commitments reflect the scheme’s dual objectives of reducing household energy costs while contributing to national carbon reduction targets. The insulation measures installed directly reduce heat loss from properties, meaning less energy required to maintain comfortable temperatures and consequently lower consumption and expenditure on heating.

Taking the next steps

Households interested in accessing support through GBIS should take several practical steps to determine their eligibility and begin the application process.

First, verify eligibility through the official gov.uk portal or by contacting a registered installer for a free assessment. Both approaches provide clarity on whether a property qualifies and what measures might be available.

Second, confirm eligibility directly with energy suppliers participating in the scheme. Suppliers maintain lists through Ofgem, and contacting them directly can provide specific information about availability and application procedures relevant to individual circumstances.

Third, explore complementary schemes where applicable. The Boiler Upgrade Scheme and other energy efficiency programmes may provide additional support for households requiring more comprehensive property improvements. For related government services, households can also check how to update their driving licence address when moving home, ensuring all records reflect current circumstances.

Frequently asked questions