What the money covers Two pots per home, and nothing to pay back
Think of it the other way round from a loan. A household that pays for loft insulation, solar panels and a heat pump itself is spending thousands up front on a home that loses heat. Under this grant the council pays for the package that the survey recommends, the upgrade stays with the home, and the household keeps the lower bills. There is no interest, no instalment and nothing to repay.
The guidance sets two separate caps per home, averaged across each council's project: £16,600 for energy performance measures (insulation, glazing, doors, heating controls, solar PV, batteries) and £16,600 for low carbon heating (heat pumps, high heat retention storage heaters and, in rare rural cases, biomass). Both rose from £15,000 in the June 2026 update, so many sites still quote the old £30,000 total.
38%of measures fitted so far are solar PV
24%are insulation of one kind or another
18%are batteries, which must sit alongside solar
Solar and batteries do most work when you use the power yourself, so the retrofit coordinator is told to check whether a time-of-use tariff would suit you and whether a smart meter is fitted. Fossil fuel heating is never funded: no new gas, oil or LPG boilers. Every measure, pot by pot.