The average UK household spends £1,800 a year on gas and electricity. One homeowner now spends less than £100, after a full eco retrofit that cost them nothing upfront.
As reported by The i Paper, the homeowner received cavity wall insulation, loft insulation, solar photovoltaic panels, and an air-source heat pump, all arranged through a local authority scheme funded by the Energy Company Obligation (ECO). The total bill to the household: £0. The annual saving: £1,700.
Who qualifies, and who doesn’t
ECO4, the current phase of the scheme running until March 2026, targets low-income households and those on certain benefits. To qualify, you typically need to be a homeowner or private tenant (with landlord permission) receiving Universal Credit, Pension Credit, or Child Benefit, and living in a property with an EPC rating of D, E, F, or G. The scheme covers insulation, heating upgrades, and in some cases solar panels. Local authorities can also bid for additional funding through the Home Upgrade Grant (HUG), which extends eligibility to off-gas-grid homes in lower council tax bands.
The catch is capacity. Suppliers have finite budgets and prioritise the hardest-to-heat homes. Waiting lists can stretch six to twelve months. The homeowner quoted in The i Paper waited over a year for their installation.
What it costs a typical 3-bed semi
Without subsidy, the same package of cavity wall insulation (£800–£1,200), loft insulation (£500–£700), a 4kW solar PV system (£6,000–£8,000), and an air-source heat pump (£7,000–£13,000) would cost between £14,000 and £22,000. The Boiler Upgrade Scheme offers a £7,500 grant toward the heat pump, but the rest must come from savings or finance. For homeowners who cannot access ECO, the payback period on solar alone is typically 10–15 years at current electricity prices.
The £1,700 annual saving in the article is plausible for a household switching from gas heating to a heat pump and generating their own electricity. Ofgem data shows the average dual-fuel bill is now £1,928 under the October 2024 price cap. Cutting that by 90% requires both generation and efficiency, not just one measure.
EPC impact and property value
An EPC jump from D to B adds an estimated 5–8% to a home’s sale price, according to research by the Department for Energy Security and Net Zero. For a typical semi-detached home valued at £250,000, that is £12,500–£20,000 in equity. The homeowner in the article likely saw their EPC rating rise from E to B, a leap that also unlocks lower mortgage rates through lenders offering green mortgages.
Yet the scheme has limits. It does not cover windows, doors, or underfloor heating. The homeowner still needed to replace old windows separately. And the heat pump requires a well-insulated home to work efficiently, which is why insulation came first.
What this misses
ECO4 does not help the majority of homeowners. Only about 1.5 million households will be reached by March 2026, against 24 million homes needing some form of upgrade to meet net-zero targets. The government’s Heat and Buildings Strategy estimates the average retrofit costs £10,000–£20,000 per home. Without a massive expansion of free schemes, most households will have to pay themselves, or wait for future policy changes.
The i Paper story is a proof of concept, not a template for the masses. It shows what is technically and financially possible, but the gap between the haves and have-nots in energy efficiency is widening. Households on low incomes can get free upgrades. Everyone else faces a decade of saving or borrowing.
What to do now
Check your eligibility for ECO4 through the gov.uk energy grants page or by contacting your energy supplier directly. If you are on benefits or have a low income, you may qualify. If you are off the gas grid, look into the Home Upgrade Grant through your local council. For everyone else, start with low-cost measures: draught-proofing, loft insulation top-ups, and a smart thermostat. These alone can cut bills by 10–15% and cost under £500.
Frequently Asked Questions
Probably not through ECO4, which is means-tested. However, some local authorities offer free or subsidised retrofits through the Home Upgrade Grant (HUG) for off-gas-grid homes in lower council tax bands. Check with your council directly.
Typical waiting times are 6–12 months from initial assessment to installation, depending on supplier capacity and the complexity of the work. The homeowner in The i Paper waited over a year.
