Great British Insulation Scheme & ECO4 cover solid wall insulation, up to £10,000 per home
Solid wall insulation grants are available in 2026 through two main government-backed programmes. These are the Great British Insulation Scheme and the Energy Company Obligation (ECO4). Both schemes are funded by energy suppliers and administered by Ofgem.
Solid wall insulation grants of up to £10,000 are available in 2026 through ECO4 and the Great British Insulation Scheme. Eligibility depends on your EPC rating and household benefits. Check with your energy supplier or local council to see if you qualify.
- ECO4 offers up to £10,000 for solid wall insulation per home.
- Great British Insulation Scheme also covers solid wall insulation.
- Eligibility requires EPC rating D, E, F, or G.
- Qualifying benefits include Pension Credit and Universal Credit.
- Check your local council for discretionary low-income grants.
- Great British Insulation Scheme & ECO4 cover solid wall insulation, up to £10,000 per home
- Who qualifies for solid wall insulation grants in 2026
- Quick numbers, key figures for solid wall insulation grants in 2026
- How to check if your home qualifies for a solid wall insulation grant
- Solid wall insulation grants for homeowners versus landlords versus tenants
- How to verify an installer for solid wall insulation grants (MCS, TrustMark, or other certification)
- The direct answer to “Do solid wall insulation grants cover the full cost in 2026?”
- What to do if your home does not qualify for a solid wall insulation grant
The maximum grant value for solid wall insulation under ECO4 is approximately £10,000 per home (Ofgem, ECO4 Guidance 2026). The Great British Insulation Scheme also covers solid wall insulation, though its maximum grant is lower and varies by supplier. The actual amount you receive depends on your property size, wall type, and the assessment carried out by your energy supplier.
Both schemes can cover the full cost of installation for eligible households, or a partial contribution if you do not meet all criteria. The Department for Energy Security and Net Zero (DESNZ) states the Great British Insulation Scheme aims to support 300,000 homes in 2026 (DESNZ, Great British Insulation Scheme Factsheet 2026).
Who qualifies for solid wall insulation grants in 2026
Eligibility for these grants depends primarily on three factors: your household income, whether you receive means-tested benefits, and your property’s Energy Performance Certificate (EPC) rating. Your home must have an EPC rating of D, E, F, or G to qualify. Homes rated C or above are not eligible for most grants (GOV.UK, ECO4 Eligibility Criteria).
Qualifying benefits include Pension Credit, Universal Credit, Child Tax Credit, Working Tax Credit, Income Support, and Housing Benefit among others. Homeowners, private tenants (with landlord permission), and social housing residents can all apply. Owner-occupiers are the primary target group for solid wall insulation grants (DESNZ, Great British Insulation Scheme Eligibility Guidance).
If you do not receive benefits but have a low income, some local authorities offer discretionary grants. Check your council’s website for local schemes.
Quick numbers, key figures for solid wall insulation grants in 2026
| Metric | Figure | Source |
|---|---|---|
| Maximum grant value per home (ECO4) | £10,000 | Ofgem ECO4 Guidance 2026 |
| Average annual energy bill saving after solid wall insulation | £200–£400 | Energy Saving Trust 2026 |
| Typical reduction in heat loss (solid wall vs insulated) | 40–50% | Energy Saving Trust 2026 |
| Minimum EPC rating to qualify for grants | D (E, F, G also eligible) | GOV.UK ECO4 Eligibility |
| Number of homes eligible under Great British Insulation Scheme (2026 target) | 300,000 | DESNZ – Great British Insulation Scheme 2026 |
How to check if your home qualifies for a solid wall insulation grant
Start by checking your EPC rating. You can find this on the GOV.UK EPC register at no cost (GOV.UK, Find an EPC). If your rating is D or below, you likely meet the property condition for grants.
Next, confirm your household income and benefit status against the list of qualifying benefits published by Ofgem (Ofgem, ECO4 Eligibility Checker). You can use the Energy Saving Trust’s online eligibility checker or contact your energy supplier directly to see if they offer ECO4 or Great British Insulation Scheme funding (Energy Saving Trust, Home Energy Grants).
If you do not receive benefits but have a low income, some local authorities offer discretionary grants, check your council’s website for local schemes. how to find local council energy grants
Solid wall insulation grants for homeowners versus landlords versus tenants
Homeowners are the primary beneficiaries of ECO4 and the Great British Insulation Scheme. Grants can cover up to 100% of costs for eligible low-income households. If you own your home and meet the criteria, you can apply directly through your energy supplier.
Landlords can apply for grants for rental properties, but only if the property meets the EPC criteria and the tenant is on qualifying benefits. The landlord must pay the tenant’s share of the cost if any (GOV.UK, ECO4 for Landlords). Tenants cannot apply independently, the landlord must agree to the installation, and the tenant must be on a qualifying benefit for the property to be eligible (DESNZ, Great British Insulation Scheme Landlord Guidance).
How to verify an installer for solid wall insulation grants (MCS, TrustMark, or other certification)
All solid wall insulation installations funded by government grants must be carried out by an installer certified under the Microgeneration Certification Scheme (MCS) or a TrustMark-approved contractor. These certifications ensure the installer meets quality standards and the work complies with building regulations.
Check the MCS Installer Database at mcscertified.com or TrustMark’s online directory to find approved installers in your area (MCS, Installer Search; TrustMark, Find a Tradesperson). For ECO4, installers must also be registered with Ofgem’s ECO4 compliance framework, confirm this directly with the installer or via your energy supplier (Ofgem, ECO4 Installer Requirements).
The direct answer to “Do solid wall insulation grants cover the full cost in 2026?”
Yes, solid wall insulation grants under ECO4 and the Great British Insulation Scheme can cover the full cost of installation, but only for households that meet the strict income and EPC eligibility criteria. Partial grants are available for others who do not meet all criteria (Ofgem, ECO4 Full Grant Guidance 2026; DESNZ, Great British Insulation Scheme Full vs Partial Grants).
If you qualify for a full grant, the installer and your energy supplier will arrange the work at no cost to you. If you receive a partial grant, you will need to pay the remaining amount.
What to do if your home does not qualify for a solid wall insulation grant
If your EPC rating is C or above, or your income is too high, you are ineligible for national grants. Consider local authority schemes or the Home Upgrade Grant (HUG) for off-gas-grid homes. The Home Upgrade Grant (HUG2, running through 2026) covers solid wall insulation for low-income households not connected to the gas grid (GOV.UK, Home Upgrade Grant).
Some energy suppliers offer interest-free loans or partial subsidies for solid wall insulation outside of ECO4, check with your supplier directly (Energy Saving Trust, Alternative Funding). You can also consider paying for the work yourself. Solid wall insulation typically pays back through energy savings over 10 to 20 years, depending on your property and fuel costs. solid wall insulation cost breakdown and payback calculator
Frequently Asked Questions
Up to £10,000 per home under ECO4 (Ofgem, ECO4 Guidance 2026). The Great British Insulation Scheme offers a lower amount that varies by supplier.
You qualify if your EPC rating is D, E, F, or G and you receive a means-tested benefit like Pension Credit or Universal Credit (GOV.UK, ECO4 Eligibility Criteria). Low-income households without benefits may get discretionary grants from local councils.
No, grants from ECO4 and the Great British Insulation Scheme do not need to be repaid (DESNZ, Great British Insulation Scheme Factsheet 2026). They are funded by energy suppliers.
Yes, private tenants can apply with landlord permission under both ECO4 and the Great British Insulation Scheme (DESNZ, Great British Insulation Scheme Eligibility Guidance).
Solid wall insulation typically lasts 30 years or more if installed correctly (Energy Saving Trust). It requires minimal maintenance and can significantly reduce heat loss.
