Ask most people who bought a house fifteen years ago about its energy rating and they probably won’t remember it. The certificate was there, somewhere near the back of the sales pack, but few buyers gave it much thought. That has changed. Property portals now show the rating on the listing itself, and it is starting to move what buyers will pay.
Bills explain most of it. Ofgem lifted its price cap by 4% from October 2026 to £1,723 a year for a typical household, after the conflict in the Middle East pushed wholesale gas prices higher. A draughty, poorly insulated house feels every one of those increases. Landlords also have new legal targets to hit. Put all of that together and the energy rating stops being a box-ticking exercise.
Buyers Are Starting to Pay for Better Ratings
Nationwide put numbers on this in August 2024. Comparing similar homes, it found an A or B rating added roughly 2.8% to the value against a D, the most common rating. F and G homes went the other way, at 4.2% below. Back in 2019, the same Nationwide analysis put the premium at 1.7% and the discount at 3.5%. Both figures have grown since. In pounds rather than percentages, that works out at about £8,400 on a £300,000 home.
Improving a rating can do more. Rightmove looked at over 200,000 homes that had sold twice and carried a better EPC the second time round. Where a seller had taken the property from F to C, the price achieved rose by 16% on average. Other renovation work probably helped too, but buyers clearly pay up for a house that won’t need work to bring its bills down.
Part of it is simply that the rating is easy to read. Buyers no longer have to climb into the loft or quiz the seller about the boiler when one letter from A to G already sums up the house. Football supporters will recognise the idea. Before a big weekend, plenty of them compare the Premier League odds across several UK bookmakers to see who is fancied and where the best price sits. A favourite’s price gets shorter once a key striker is passed fit and drifts out if the team sheet disappoints. Upsets happen every season too, a reminder that odds measure likelihood and never certainty. An energy letter works in much the same way. Put a D next to a B on two similar homes and buyers soon start pricing the gap into their offers.
Running costs matter just as much. Lower bills are the obvious payoff of an efficient home, and the certificate gives an estimate of those costs before a single viewing. Some lenders add a further nudge through green mortgages, knocking a little off the rate when the rating is high enough.
Landlords Face a Firmer Deadline
The Warm Homes Plan came out in January 2026 and set 1 October 2030 as the date by which privately rented homes in England and Wales need an EPC C or its new equivalent. Right now they only need an E. Landlords who spend up to £10,000 on a property and still can’t reach C can register an exemption, though only once that money has actually gone on improvements.
That is a big jump. Around 2.5 million privately rented homes in England sit below C, going by government figures. Investors buying one of those homes tend to knock the cost of the work off their offer, so the hit to value lands on the current owner. Landlords getting EPC upgrades done early can avoid most of that, ideally by doing the work in the gap between one tenancy and the next.
Europe is heading the same way. New buildings owned by public bodies must be zero-emission from 2028 under the revised Energy Performance of Buildings Directive, and the rule covers every other new building from 2030. Each member state also has to bring down the average energy use of its housing stock by at least 16% by 2030 and by 20 to 22% by 2035.
Where Upgrade Money Goes Furthest
Cheaper fixes usually come first. Loft insulation and cavity wall filling sit at the cheaper end, and both can make a noticeable difference to the rating. Glazing, heat pumps and solar panels are bigger outlays. Matched to the right property, any of them can lift a home by a full band. Nationwide puts the bill for improving the average home at about £7,400, climbing to roughly £13,500 for properties with low ratings.
Age matters too. Almost every home built since 2012 already sits at C or better. A Victorian terrace is a different story, often with solid walls and original sash windows, and listed status or conservation area rules can limit what changes are allowed.
Location, size and condition will still decide most of a home’s price. Where energy efficiency matters is at the margin, between two otherwise similar homes, and that margin is likely to widen as 2030 gets closer. For sellers and landlords alike, a better rating is starting to look less like an upgrade and more like protection for the value of the home.
