The Great British Insulation Scheme will help 80,000 fewer homes this winter than originally planned, a cut of nearly 40% from its target. That is the stark figure behind the Guardian’s report on the scheme’s reduced budget, as reported by The Guardian. For homeowners in poorly insulated properties, this means one less route to lower bills, and a colder winter.
Who qualifies, and who doesn’t
The Great British Insulation Scheme targets low-income households and those in council tax bands A-D with an EPC rating of D or below. Under the original plan, it would have installed cavity-wall, loft, and solid-wall insulation in up to 200,000 homes by March 2026. The cut reduces that to roughly 120,000. Ofgem, which administers the scheme, confirmed the lower figure to the Guardian. The catch is that many of the homes that need insulation most, those with solid walls or no loft access, remain ineligible because the scheme prioritises cheaper, quicker measures. Solid-wall insulation costs £8,000–£15,000 per home; loft insulation runs £300–£600. The budget cut means fewer of even the cheaper jobs will be done.
What it costs a typical 3-bed semi
A 3-bed semi with uninsulated loft and cavity walls loses about 25% of its heat through the roof and 35% through the walls. Adding 270mm loft insulation cuts the heat loss by roughly two-thirds, saving £200–£300 a year on gas bills, according to Energy Saving Trust figures. Cavity-wall insulation saves another £200–£300 annually. For a household on a standard variable tariff paying £1,800 a year for gas and electricity, that is a combined saving of up to £600, about a third of the total bill. Yet the scheme’s reduced capacity means many of those homes will wait another year for the work. The EPC impact is immediate: a move from EPC band E to D typically adds 5–10 points on the rating scale, and from D to C adds another 10–15. That can lift a property into a higher mortgage bracket or rental compliance threshold.
But there are other options
Homeowners not covered by the scheme can still access the Energy Company Obligation (ECO4), which runs until March 2026 and covers insulation, heating upgrades, and draught-proofing for low-income and vulnerable households. ECO4 has a separate budget and is not affected by the insulation scheme cuts. For those who do not qualify for either grant, the simplest action is to check loft insulation depth: if it is less than 270mm, topping it up costs about £300–£400 for a professional job, or £100–£150 in materials for DIY. The payback period is under two years at current prices. Draught-proofing windows and doors costs £50–£200 and saves £30–£50 a year. None of these require government approval, just a Saturday afternoon and a trip to the builders’ merchant.
What to do and by when
Households that think they might qualify for the Great British Insulation Scheme should apply now via the gov.uk website or call the Energy Saving Trust’s advice service on 0800 444 202. Eligibility closes when the remaining budget is spent, likely by early 2025. For those outside the scheme, the cheapest first step is to book a free home energy assessment through your local council or the Energy Saving Trust. The assessment takes an hour and identifies the biggest heat-loss areas. The second step is to act: buy loft insulation, seal skirting boards, fit a chimney balloon. The third step is to plan for larger measures, heat pumps, solar panels, that require a higher EPC rating to qualify for grants. Without insulation, those bigger upgrades will underperform. The cuts to the scheme are a setback, but they are not a dead end.
Frequently Asked Questions
No. ECO4 is a separate programme with its own budget, running until March 2026. It covers insulation, heating, and draught-proofing for low-income and vulnerable households. The cut only reduces the number of homes helped by the Great British Insulation Scheme.
DIY loft insulation costs about £100–£150 for materials (mineral wool rolls or sheep's wool). A typical 3-bed semi saves £200–£300 a year on heating bills. The payback period is under two years. You must install at least 270mm depth to meet current building regulations.
