Government Energy Grants

The UK government currently makes available over £6 billion in energy efficiency funding through a range of schemes built to help homeowners reduce bills, cut carbon emissions, and upgrade ageing heating systems. In 2026, these government energy grants UK programmes cover everything from heat pump installations worth up to £7,500 to free insulation for households in fuel poverty. Understanding which schemes you qualify for, and how to access them efficiently, can mean the difference between a fully funded upgrade and paying full price out of pocket.

What Government Energy Grants Are and Why They Exist

Government energy grants are direct financial contributions, not loans, that reduce or eliminate the upfront cost of installing energy-efficient technology in your home. Unlike financing arrangements, grants do not need to be repaid. They exist because the UK government has legally binding commitments to reach net zero carbon emissions by 2050, and domestic properties account for approximately 17% of all UK carbon emissions. Incentivising homeowners to switch from gas boilers to heat pumps, and to insulate their properties properly, is central to meeting that target.

The grants are administered through a mix of government bodies, energy suppliers, and approved installers. Some schemes are means-tested, targeting households in fuel poverty or those receiving certain benefits. Others, like the Boiler Upgrade Scheme, are open to any homeowner regardless of income. Each scheme has its own eligibility criteria, application process, and funding cap, which is why navigating the landscape requires a clear understanding of what is available.

The Main Government Energy Grant Schemes in 2026

Four primary programmes form the backbone of the government’s home energy upgrade funding in 2026. Each addresses a different part of the energy efficiency challenge, and many homeowners are eligible for more than one scheme simultaneously.

Boiler Upgrade Scheme

The Boiler Upgrade Scheme (BUS) provides a grant of up to £7,500 towards the cost of replacing a fossil fuel boiler with an air source heat pump, ground source heat pump, or biomass boiler. The scheme is administered by Ofgem and is available to homeowners in England and Wales. Your installer claims the grant on your behalf and deducts it from the installation invoice, so you never handle the money directly. There is no income threshold, the scheme is open to all owner-occupiers and landlords.

ECO4 Scheme

The Energy Company Obligation 4 (ECO4) scheme runs until March 2026 and obligates the UK’s largest energy suppliers to fund energy efficiency improvements in low-income and vulnerable households. Measures covered include cavity wall insulation, loft insulation, solid wall insulation, heat pumps, and first-time central heating systems. Households receiving qualifying benefits such as Universal Credit, Pension Credit, or Child Tax Credit are typically eligible. The average ECO4 package is worth approximately £10,000 to £15,000 in installed measures.

Great British Insulation Scheme

The Great British Insulation Scheme closed on 31 March 2026. It funded insulation measures only and never covered windows or glazing. Unlike ECO4, it has a broader eligibility base, roughly a third of qualifying households are selected on the basis of low EPC rating alone, regardless of income. The remaining two-thirds are means-tested. Typical measures include loft insulation, cavity wall insulation, and solid wall insulation.

Home Upgrade Grant

The Home Upgrade Grant (HUG2) targets off-gas-grid properties, homes not connected to the mains gas network, in England. It is means-tested and focuses on low-income households. Funding covers insulation, heat pumps, solar panels, and other low-carbon heating measures. Grants are delivered through local authorities, and the value can reach up to £10,000 per property depending on the measures required.

How Government Energy Grants Work

The mechanics vary by scheme, but most government energy grants follow a broadly similar process. Understanding how the money flows helps you avoid common pitfalls and ensures you receive the full entitlement.

For the Boiler Upgrade Scheme, the process is installer-led. You choose a Microgeneration Certification Scheme (MCS)-accredited installer, who applies for the voucher on your behalf before work begins. Once Ofgem issues the voucher, the installer completes the installation, redeems the voucher, and you pay only the balance above the grant amount. Vouchers are valid for three months and can be renewed once.

The Great British Insulation Scheme closed on 31 March 2026. It funded insulation measures only and never covered windows or glazing. In many cases, the entire cost is covered and the householder pays nothing at all. The contractor installs the measure, and the energy supplier claims the installation against their legal obligation. You do not apply directly to the government, your route in is either through your energy supplier or through the government’s Simple Energy Advice (SEA) service at simpleenergyadvice.org.uk.

The Home Upgrade Grant operates through local authorities. You apply to your local council, which assesses your eligibility and commissions installers from a pre-approved framework. Funding is allocated in tranches, so availability depends on where you live and how much of the local authority’s allocation has already been committed.

Eligibility for Government Energy Grants

Eligibility rules differ significantly between schemes, but several factors consistently influence whether you qualify.

• Property type and tenure: Most schemes require you to own your home or have landlord permission. Renters can benefit if their landlord applies, particularly under ECO4.
• Current heating system: The Boiler Upgrade Scheme requires you to be replacing a fossil fuel boiler or direct electric heating. ECO4 prioritises properties with the least efficient existing systems.
• EPC rating: The Great British Insulation Scheme targets properties with an EPC of D or below. Some ECO4 measures require the property to reach EPC band C or above after installation.
• Income and benefit status: ECO4 and HUG2 are means-tested. Qualifying benefits include Universal Credit, Pension Credit, Housing Benefit, Child Tax Credit, and Working Tax Credit (subject to income thresholds).
• Geographic location: The Boiler Upgrade Scheme covers England and Wales only. Scotland and Northern Ireland have separate schemes, including the Scottish Heat Pump Fund and Northern Ireland’s Affordable Warmth scheme.
• Fuel source: HUG2 is exclusively for properties off the mains gas grid. That makes it particularly relevant for rural homeowners reliant on oil, LPG, or solid fuel.

How Much Government Energy Grants Cover in 2026

Grant values vary by scheme and by the specific measure being installed. The table below sets out the key funding amounts available in 2026.

Grant values cover a significant portion of typical installation costs but may not cover everything. A ground source heat pump installation, for example, typically costs between £20,000 and £35,000, meaning the £7,500 BUS grant still leaves a substantial balance to fund. An air source heat pump installation averages £10,000 to £15,000, making the grant considerably more impactful as a percentage of total cost.

Benefits of Government Energy Grants

The financial and practical advantages of accessing government energy grants are substantial and well-documented.

• Immediate bill reductions: Households that install insulation under ECO4 report average annual savings of £300 to £500 on energy bills. Solid wall insulation alone can reduce heat loss by up to 45%.
• Long payback periods become manageable: Heat pumps have a payback period of 8 to 12 years without grant support. The £7,500 BUS grant can reduce this to 5 to 7 years at current energy prices.
• Increased property value: Properties upgraded from EPC band E to band C or above typically see valuations increase by 5% to 8%, according to data from Nationwide Building Society.
• Carbon savings: A household switching from a gas boiler to an air source heat pump reduces its annual carbon emissions by approximately 2.5 to 3.5 tonnes of CO₂, depending on property size and insulation levels.
• Future-proofing against policy change: The government has committed to phasing out gas boiler installations in new builds from 2025, with wider restrictions expected on older housing stock. Acting while grant funding is available locks in subsidised costs before the market tightens.
• No repayment obligation: Unlike the Green Deal (which required loan repayments attached to the electricity bill), current grants carry no debt and no ongoing obligation.

How to Choose the Right Government Energy Grant

With multiple overlapping schemes available, the most effective approach is to identify every grant you are eligible for before committing to any single scheme. The following decision framework helps structure that process.

Step 1, Assess your current EPC rating

Your EPC rating determines which schemes you can access. If your property is rated F or G, you are likely eligible for the most comprehensive ECO4 packages. The Great British Insulation Scheme closed on 31 March 2026. It funded insulation measures only and never covered windows or glazing. Properties rated A to C are unlikely to qualify for insulation-based grants but may still access the Boiler Upgrade Scheme.

Step 2, Check your benefit and income status

If you or anyone in your household receives Universal Credit, Pension Credit, Child Benefit (subject to income cap), or a qualifying disability benefit, apply for ECO4 first. The potential value, up to £15,000 in fully funded measures, exceeds any other available scheme.

Step 3, Identify your heating fuel

If your home is not connected to the mains gas grid, the Home Upgrade Grant is your primary route to funded low-carbon heating. Off-gas-grid homes running on heating oil, LPG, or solid fuel are the priority for HUG2 and often qualify for the highest grant values.

Step 4, Consider stacking schemes

There is no rule preventing you from accessing multiple grants sequentially. A homeowner might receive ECO4-funded cavity wall insulation first, then apply for the Boiler Upgrade Scheme to replace their gas boiler with a heat pump. Improving your insulation before installing a heat pump also makes good practical sense, a well-insulated home requires a smaller, cheaper heat pump to operate effectively.

Government Energy Grants Installation, What to Expect

The installation experience varies by technology and scheme, but most homeowners go through a predictable sequence of stages.

1. Initial assessment: An accredited assessor visits your property to evaluate its suitability. For heat pumps, this involves measuring the property’s heat loss and sizing the system correctly. For insulation, the assessor checks wall construction, loft space access, and cavity condition. This visit is usually free.
2. Surveyor sign-off: A formal survey report is produced that specifies the recommended measures and confirms eligibility under the relevant scheme. For ECO4 and GBIS, this report is submitted to the energy supplier or scheme administrator.
3. Voucher or funding approval: Under the BUS, Ofgem issues a grant voucher electronically within a few days of a valid application. Under ECO4 and HUG2, the funding is approved internally before the installer is given the go-ahead to proceed.
4. Scaffolding and preparation: Solid wall insulation and some heat pump installations require scaffolding. Expect this to be in place for one to three weeks. Cavity wall insulation and loft insulation are typically completed in a single day with no scaffolding.
5. Installation day: Air source heat pump installation typically takes two to three days. Cavity wall insulation is completed in half a day. Loft insulation takes a few hours. Ground source heat pump installation is more disruptive, involving groundworks that can take one to two weeks.
6. Commissioning and handover: The installer commissions the system, registers it with the relevant certification body (MCS for heat pumps), and provides you with an operating manual and demonstration. For heat pumps, you will need to understand the heating controls to run the system efficiently.
7. Post-installation documentation: You will receive an updated EPC to reflect the improvements, plus warranty documentation. Heat pumps typically carry a five to seven year manufacturer’s warranty, often extendable to ten years.

Common Problems and Maintenance

Government-funded installations are carried out by accredited contractors, which provides a degree of quality assurance, but problems do occasionally arise. Knowing what to watch for protects your investment.

Heat pump performance issues

The most common complaint from heat pump owners is higher-than-expected electricity bills. This usually stems from incorrect system sizing or poor radiator sizing rather than a fault with the unit itself. Heat pumps operate most efficiently at lower flow temperatures, around 35°C to 45°C, which means radiators may need to be upsized to compensate. If your heat pump was installed as part of a BUS application, your installer has a contractual obligation to size the system correctly. If you suspect undersizing, request a review from your installer and, if necessary, escalate to MCS or your installer’s trade body.

Insulation condensation problems

Poorly specified or installed solid wall insulation can create condensation and damp problems if vapour control is not handled correctly. This is more common with internal wall insulation than external. If you notice increased condensation on internal walls or window reveals following an insulation installation, contact the installer immediately. Reputable installers use breathable or vapour-controlled membranes as standard. All ECO4 and GBIS installations must comply with PAS 2030 and PAS 2035 standards, which include requirements for moisture management.

Ongoing maintenance requirements

• Heat pumps require an annual service to check refrigerant levels, clean filters, and inspect electrical connections. Budget approximately £100 to £200 per year for a service contract.
• Cavity and loft insulation requires no regular maintenance but should be inspected if you carry out any building work that disturbs the roof space or walls.
• Biomass boilers require regular ash removal and an annual professional service. Fuel storage also needs to be kept dry and pest-free.
• Check that your home insurance policy covers the new measures. Heat pumps, in particular, may require a specific rider or policy update.

Grants and Funding, Scotland, Wales, and Northern Ireland

Energy policy is devolved, which means homeowners in Scotland, Wales, and Northern Ireland have access to different, and in some cases more generous, funding arrangements alongside or instead of the England-focused schemes described above.

In Scotland, the Home Energy Scotland scheme offers interest-free loans of up to £15,000 for energy efficiency improvements, alongside cashback grants of up to £7,500 for heat pumps. The scheme is administered by Energy Saving Trust on behalf of the Scottish Government and is open to owner-occupiers regardless of income. The Warmer Homes Scotland scheme provides fully funded measures for households in fuel poverty.

In Wales, the Nest scheme provides free home energy improvements to households on means-tested benefits, including insulation and heating upgrades. The Optimised Retrofit programme supports social landlords and, in some cases, private homeowners with whole-house retrofit packages.

In Northern Ireland, the Affordable Warmth scheme and the Home Energy Conservation Act programme support low-income households, while the Reconnect programme offers grants for renewable energy installations including heat pumps and solar thermal systems.

If you live outside England, start your research with your devolved government’s energy efficiency portal, as the schemes available to you may differ substantially from those described in this guide.

Maximising the Value of Government Energy Grants

Getting the most from available funding requires a planned, sequenced approach rather than taking the first scheme you come across. The following principles apply regardless of which specific grants you pursue.

• Get an EPC before you apply: A current EPC (no more than two years old for most schemes) is required by nearly every grant programme. If yours is out of date, commission a new one from an accredited domestic energy assessor, costs typically range from £60 to £120.
• Use the Simple Energy Advice service: The government’s official SEA service at simpleenergyadvice.org.uk provides a free eligibility check for all major schemes and connects you with approved installers. It is the single most efficient starting point for most homeowners.
• Insulate before you heat: Installing a heat pump in a poorly insulated home means paying for a larger, more expensive system that will cost more to run. If you qualify for both insulation grants and the Boiler Upgrade Scheme, complete the insulation first to reduce the heat pump size, and cost, required.
• Get three quotes for any work not fully funded: Where grants cover only part of the installation cost, competitive tendering remains essential. All BUS-eligible installers must be MCS-accredited, which provides a baseline quality standard, but prices still vary significantly.
• Keep all documentation: Retain your grant vouchers, installation certificates, EPC updates, and warranty documents. These will be required if you remortgage, sell your property, or need to make a warranty claim.

The landscape of government energy grants in the UK continues to evolve as policy priorities shift and funding cycles renew. Checking eligibility annually, even if you have already accessed one scheme, ensures you do not miss new funding rounds or expanded eligibility criteria. With billions of pounds still allocated for distribution through 2026 and beyond, the opportunity to make meaningful, funded improvements to your home’s energy efficiency remains substantial.