Surrey Heath Council shows how ECO4 cuts energy bills

The average UK household spends £1,800 a year on energy, and nearly a third of that leaks through uninsulated walls and roofs. Surrey Heath Borough Council is the latest local authority to push the message: stop paying to heat the street.

The council’s new page on cutting energy consumption, as reported by Surrey Heath Borough Council, directs residents to the national ECO4 scheme, a government programme that covers the full cost of insulation, heating upgrades, and even glazing for those who qualify. It’s not a loan. It’s not a discount. It’s free installation, paid for by energy suppliers through the Energy Company Obligation.

Who qualifies, and who doesn’t

ECO4 targets households on means-tested benefits: Universal Credit, Pension Credit, Child Tax Credit, and others. But the net is wider than many think. If your household income is below £31,000 and you live in an EPC-rated D, E, F, or G property, you may still qualify under the ‘flex’ route that councils like Surrey Heath can authorise. Ofgem figures show that over 400,000 homes have been upgraded since the scheme launched in 2022, but take-up varies wildly by region.

The catch is that ECO4 is not a universal free-for-all. Owner-occupiers and private tenants in properties with an EPC below C are eligible, but landlords must contribute up to one-third of the cost for rented homes. And the scheme is capped: once a supplier meets its obligation, the funding line closes. Surrey Heath’s page is a reminder that local councils are the gateway, they assess eligibility and refer households to approved installers.

What it costs a typical 3-bed semi

For a qualifying household, the cost is zero. The typical 3-bed semi with cavity wall insulation saves about £260 a year, according to Energy Saving Trust estimates. Add loft insulation topped up to 270mm, and the saving jumps to around £350. A full heating system upgrade, replacing an old G-rated boiler with an A-rated heat pump, can save £500–£600 annually. The EPC rating typically rises by two bands, from an E to a C, which adds resale value and meets the government’s 2035 minimum standard.

But the numbers assume the work is done properly. Poor installation, gaps in cavity fill, unsealed loft hatches, can halve the savings. The ECO4 framework requires certified installers and post-installation inspections, but homeowners should still check TrustMark registration and ask for a detailed scope of works before signing.

How to apply, and by when

Surrey Heath residents can apply through the council’s energy team or directly via the national ECO4 portal at gov.uk. The scheme runs until March 2026, but supplier budgets are allocated quarterly. The first quarter of 2025 saw high demand in the South East; some suppliers paused new applications by April. The advice is to apply now, not next winter.

Households not on benefits can still access ECO4 flex if the council declares the area ‘low income and vulnerable’, a decision that Surrey Heath has made for certain postcodes. Check the council’s list of eligible areas before assuming you don’t qualify. For everyone else, the successor scheme, ECO5, is expected in 2026, but its terms and funding levels are not yet confirmed.