Energy grants for your home 2025 what UK homeowners need to know

The Great British Insulation Scheme has already paid out £180 million to 300,000 homes since 2023, yet 4.2 million lofts remain uninsulated across England alone. That is a cold, expensive gap in the nation’s energy efficiency, and one the current government is still trying to plug through a patchwork of grants.

Which? published a comprehensive round-up of available schemes this week, covering everything from free cavity wall insulation to heat pump vouchers. Energy grants for your home is a useful starting point, but the devil, as ever, is in the eligibility details and the waiting times.

Who qualifies, and who doesn’t

The biggest programme by volume is the Great British Insulation Scheme, which targets homes with an EPC rating of D or below. It covers loft insulation, cavity wall insulation, and in some cases solid wall insulation. There is no income test: if your home is in the right EPC band and you own it (or have landlord permission), you can apply. The catch is that funding is first-come, first-served, and many local installers report backlogs of three to six months.

For low-income households, ECO4 is more generous. Funded by energy suppliers under the government’s Energy Company Obligation, it can cover the full cost of new heating systems, insulation, and even solar panels. Eligibility is tied to means-tested benefits such as Pension Credit, Universal Credit, or Child Tax Credit. The Energy Saving Trust estimates the average ECO4 package is worth around £10,000 per home. But applicants must go through their energy supplier, and not all suppliers offer the same level of service.

What it costs a typical 3-bed semi

If you don’t qualify for free grants, the Boiler Upgrade Scheme is the next best option. It offers a flat £7,500 discount on an air source heat pump installation, bringing the typical cost down from roughly £12,000 to £4,500 for a 3-bed semi. The scheme runs until March 2028, and the government has committed to 50,000 grants per year. Ofgem processes the applications, and the installer claims the grant on your behalf.

But there’s a catch: the heat pump will only save you money if the house is properly insulated. Ofgem data shows that homes with an EPC rating of C or above see average heating bill reductions of 20-30% with a heat pump, while those in D-rated homes often see no change or even a small increase. That means the insulation grant should come first, a point the Which? article makes implicitly but bears repeating.

How to apply, and when to act

Applications for the Great British Insulation Scheme are handled by energy suppliers. You can check eligibility on the gov.uk website and then contact your supplier directly. For ECO4, you need to be referred through your energy company or a local authority partner. The Boiler Upgrade Scheme is simpler: find an MCS-certified installer, and they handle the paperwork.

The window for action is now. The Great British Insulation Scheme closed on 31 March 2026. It funded insulation measures only and never covered windows or glazing. ECO4 runs until 2026 as well, but budget caps mean early applicants get the best choice of measures. The Boiler Upgrade Scheme is less time-sensitive, but installer prices are rising as demand for heat pumps grows, 50,000 installations in 2024, up from 30,000 in 2023.

Households on standard variable tariffs should check their EPC rating first, it’s free online via gov.uk. If it’s D or below, call your energy supplier this week and ask about the Great British Insulation Scheme. For those on benefits, ECO4 can cover everything from loft insulation to a new heat pump. The money is there, but it won’t wait.