If you've seen headlines about EPC Band C becoming mandatory and assumed it's already the law, you're not alone, and you're not quite right either. Here's what's actually required today, and what's genuinely coming.
The current legal minimum is Band E, not C. Since 1 April 2020, you cannot let or continue letting a property covered by the Minimum Energy Efficiency Standards with an EPC rating below E. A property rated F or G simply cannot be let unless a valid exemption is actively registered on the PRS Exemptions Register, a written note to yourself that you meant to sort it doesn't count, it has to be formally registered with supporting evidence.
What non-compliance actually costs right now. Local authorities can issue compliance notices and financial penalties of up to £5,000 per property for letting below the minimum standard without a registered exemption. An EPC itself is valid for 10 years unless a newer one is lodged, and typically costs somewhere in the region of £60 to £120 for a domestic rental, more for larger or unusually laid-out properties.
The real change, and why the confusion exists. The government's Warm Homes Plan, published January 2026, confirmed that the minimum will rise to the equivalent of Band C, with a single date of 1 October 2030 applying to every private tenancy, new and existing alike, not a separate earlier deadline for new lets. The expected cost cap is £10,000 per property, down from an earlier proposed £15,000, and the maximum penalty is set to rise substantially, to £30,000 per property per breach, once this takes effect.
This isn't law yet. The Band C requirement needs a new Act of Parliament, which the government has said it intends to bring forward with a view to it being in force by 2027, ahead of the 2030 compliance date, but it remains subject to Parliamentary approval. Until that happens, Band E is what you're legally required to meet, and it's worth not confusing a confirmed government intention with an enforceable requirement, however likely it looks.
What's actually worth doing now. Panic-spending to hit Band C years before it's required isn't necessary, but ignoring it entirely isn't smart either, since qualifying spend from 1 October 2025 onward is expected to count toward the eventual £10,000 cap. Knowing your property's current rating, and getting a realistic sense of what it would take to reach C, means you're planning on your own timeline rather than scrambling as 2030 approaches.
We check EPC status as a standard part of managing every property, current rating, exemption status where relevant, and a realistic view of what future compliance will involve, so it's never a surprise you find out about from a council letter.