What are external wall insulation grants?
External wall insulation grants are financial assistance schemes designed to support homeowners in funding the insulation of their solid-walled properties from the outside. These grants typically cover part or all of the costs associated with insulation boards, fixings, render or cladding, as well as professional installation.
For the millions of UK households living in older, inefficient homes, these grants offer a vital opportunity to cut heat loss, reduce energy bills, and upgrade homes without the entire expense falling on the homeowner’s shoulders. They contribute to the UK’s legally binding climate target to achieve net zero emissions by 2050, representing a 100% reduction compared to 1990 levels.
Why do external wall insulation grants exist?
These grants are a response to the fact that many solid-walled homes in the UK lose between 25% and 35% of their heat through untreated external walls. These properties, particularly those built before the 1920s, are among the least energy efficient in the UK housing stock. In fact, overall, the UK has some of the least efficient homes in Europe, largely due to its old and draughty buildings as well as its inefficient new builds.
Improving external insulation is a proven method to decrease energy demand, lower carbon emissions, and help alleviate fuel poverty for households. Schemes like ECO4 are mandated to support eligible residents, with energy suppliers funding upgrades to meet national sustainability objectives and reduce long-term pressure on the energy grid.
Which grant schemes are available for external wall insulation in 2025?
- ECO4 (Energy Company Obligation): The main national scheme, running until March 2026, supports low-income households with energy-saving upgrades, including external wall insulation.
- Great British Insulation Scheme (GBIS): Focused on low- to middle-income households, especially in council tax bands A to D or with poor EPC ratings, delivering scalable and effective insulation measures.
- Warm Homes: Local Grant: Starting in April 2025 and managed by local authorities, this scheme offers up to £15,000 for comprehensive insulation improvements, including external wall insulation, targeting older and off-gas homes.
Official statistics show that since the launch of schemes like GBIS, over 63,400 insulation measures have been installed across the UK, with cavity wall insulation being the most common, followed by loft insulation. These schemes continue to expand, helping millions of homes become more energy-efficient and comfortable.
Who qualifies for external wall insulation grants?
Eligibility generally includes:
- Household income below specified thresholds or receipt of qualifying benefits such as Pension Credit or Universal Credit.
- Homes with solid external walls and an EPC rating of D, E, F, or G.
- The homeowner or tenants, with the landlord’s consent.
- Some schemes may also prioritise households with health conditions such as respiratory issues or disabilities.
Always check with approved installers or your local authority to confirm your eligibility.
How to apply for an external wall insulation grant
The application process is straightforward; we’ve provided the following checklist to assist you.
- Check your eligibility: Use online schemes or certified installers to assess your income, property type, and EPC status.
- Arrange a survey: A qualified assessor visits your property to assess the wall type, any damp issues, and determine its suitability for insulation.
- Submit your application: Your installer or provider applies on your behalf, reducing paperwork and streamlining the process.
- Installation: Once approved, professionals schedule and complete the work, which includes wall preparation, fixing insulation boards, mesh reinforcement, and final weatherproofing with render or cladding.
How much funding can you get?
Funding amounts vary depending on the scheme and the specific circumstances of your property. Under ECO4, eligible households may receive fully funded installations covering the entire cost, which typically ranges between £8,000 and £14,000. Some schemes require a small contribution depending on household income or property type.
Benefits of applying for grants for external wall insulation
- Lower heating bills: Insulation reduces heat loss through external walls, leading to substantial savings, especially during the current energy crisis when bills are particularly high.
- Enhanced comfort: Eliminates cold spots, draughts, and unequal temperatures.
- High EPC ratings: Upgrading external walls improves your property’s energy performance score, adding value.
- Protection: Insulation acts as a weather barrier, safeguarding walls from damp, rain, and weather erosion.
- Environmental benefits: Cuts carbon emissions by reducing energy demand.
- Longevity: Modern render systems also protect walls from weather damage, extending their lifespan.
Common considerations when applying for grants
- Always select TrustMark or PAS 2030-certified installers to guarantee quality and compliance.
- Homes in conservation areas or listed buildings may need planning permission; early consultation is advisable.
- Adequate ventilation must be factored into the installation to avoid condensation issues caused by improved airtightness.
- Keep in mind that grant funding is limited and often allocated on a first-come, first-served basis. Submitting your application early improves your chances.
- Minor preparatory repairs, such as fixing dampness or cracks, may be necessary before insulation installation. This could be covered by the grant.
Is applying for a grant risky?
Applying for a government grant is considered low-risk when working with reputable, accredited installers. Always request written contracts, verify credentials such as TrustMark or PAS, and ensure guarantees are included. Reputable installers will guide you through the process, provide detailed quotations, and ensure your project remains compliant with current standards.
Take the next step
If you believe you qualify for external wall insulation grants, Eco Insulation is here to support you. From eligibility assessments to professional installation, we connect you with trusted, local installers experienced in delivering long-lasting results. Get a quote today to start your journey to a warmer, more energy-efficient home with grant-backed support and professional assistance.