The main grant for off-grid UK homes is the Boiler Upgrade Scheme (BUS), which offers £7,500 for an air source heat pump or £7,500 for a ground source heat pump, and the Energy Company Obligation (ECO4) scheme, which can fund insulation and heating upgrades for eligible low-income households not connected to the gas grid (GOV.UK, 2026). These grants are the primary financial support available for off-grid properties, though eligibility and scope vary.
Off-grid homes, those not connected to mains gas, electricity, or water, often rely on oil, LPG, solid fuel, or renewable systems. Grants target energy efficiency and low-carbon heating, not off-grid status itself. The key variable is your primary heating fuel: if you use oil, LPG, or solid fuel, you qualify for BUS heat pump grants. ECO4 applies if your home has an EPC rating of D, E, F, or G and you receive certain benefits. Both schemes exclude homes on mains gas unless you meet specific fuel-poverty criteria.
Boiler Upgrade Scheme heat pump grants
Under the Boiler Upgrade Scheme, off-grid homes can get £7,500 towards an air source heat pump or £7,500 for a ground source heat pump (GOV.UK, 2026). The grant is fixed and does not require income testing. To qualify, your property must have a valid EPC with no outstanding recommendations for loft or cavity wall insulation. The heat pump must be installed by an MCS-certified installer. The scheme runs until March 2028 and caps installations at 90,000 per year nationally. Apply through your installer, who claims the grant on your behalf.
Energy Company Obligation for off-grid homes
ECO4 provides fully funded insulation, heating controls, and renewable heating upgrades for low-income off-grid households. Eligible homes must have an EPC rating of D or below and receive qualifying benefits such as Pension Credit or Universal Credit (GOV.UK, 2026). Off-grid homes can receive first-time central heating (including heat pumps) if they currently use electric storage heaters or solid fuel. The scheme is administered by energy suppliers; you apply through your supplier or a registered installer. ECO4 runs until March 2026, with a successor scheme expected.
Other support for off-grid properties
The Home Energy Scotland grant offers up to £7,500 for heat pumps and £1,500 for insulation, plus an additional £1,500 for rural off-grid homes (Energy Saving Trust, 2026). In Wales, the Nest scheme provides free energy-efficiency improvements for off-grid homes on means-tested benefits. The Great British Insulation Scheme offers cavity wall and loft insulation grants for all homes, including off-grid, with no income limit but limited to specific measures. No dedicated off-grid home grant exists; support is tied to heating type, income, and location.
A worked example
A typical 3-bedroom 1930s semi-detached house in rural Yorkshire currently heated by an oil boiler would pay around £4,200 upfront for an air source heat pump installation after the £7,500 Boiler Upgrade Scheme grant is applied. Based on Energy Saving Trust data, switching from oil to a heat pump saves roughly £590 per year on heating bills, meaning the upfront cost is recovered in just over 7 years. Over a 25-year system lifetime, total savings reach approximately £14,750, not accounting for future oil price rises or the 0% VAT on heat pump installations until March 2027. This home would also qualify for ECO4-funded loft and cavity wall insulation if the household receives eligible benefits and has an EPC rating of D or below, cutting annual heating costs by a further £300.
| Item | Figure |
|---|---|
| Upfront cost after grants | £4,200 |
| Yearly savings | £590 |
| Payback period | 7 years |
| 25-year lifetime savings | £14,750 |
What homeowners often get wrong
The most common mistake off-grid homeowners make is assuming they need a specific “off-grid grant” rather than checking eligibility for standard schemes like BUS and ECO4. Here are three frequent errors that cost people time and money.
- Assuming oil boilers are ineligible for BUS Many homeowners think the Boiler Upgrade Scheme only applies to gas-heated homes, but off-grid properties using oil, LPG, or solid fuel are actually the primary target. This misconception has caused thousands to miss out on £7,500 heat pump grants they clearly qualify for.
- Ignoring ECO4 for insulation before a heat pump Homeowners often install a heat pump without first upgrading insulation, resulting in higher running costs and a system that struggles to heat the home properly. ECO4 can fully fund loft, cavity wall, and solid wall insulation for eligible low-income households, cutting heat loss by up to 35% before the heat pump is even fitted.
- Thinking BUS covers installation of a new oil boiler The Boiler Upgrade Scheme only supports low-carbon heating systems like heat pumps and biomass boilers, not replacement oil or LPG boilers. Installing a new oil boiler with BUS is impossible, and doing so without a grant can cost £3,000 to £5,000 with no ongoing savings.
Quick reference
- The Boiler Upgrade Scheme offers a flat £7,500 grant for air or ground source heat pumps in off-grid homes, with no income test required.
- ECO4 covers full or partial funding for insulation and heating upgrades for off-grid households receiving benefits with an EPC rating of D through G.
- Off-grid homes using oil, LPG, or solid fuel automatically qualify for BUS heat pump grants regardless of location or property type.
- Homeowners who install a heat pump before insulating risk voiding their warranty and paying up to 40% more in annual running costs.
- Applying for BUS requires an MCS-certified installer and the grant is deducted from the final invoice, not paid as a cash rebate.
Frequently Asked Questions
Yes, off-grid homes qualify for £7,500 towards a heat pump under the Boiler Upgrade Scheme. GOV.UK confirms eligibility if you use oil, LPG, or solid fuel and have a valid EPC.
ECO4 provides free or subsidised insulation and heating upgrades for low-income off-grid homes. Eligibility requires an EPC rating of D to G and receipt of certain benefits, per Ofgem rules.
Apply for the Boiler Upgrade Scheme through an MCS-certified installer who submits the grant on your behalf. For ECO4, contact your energy supplier or a certified installer to check eligibility.
