Minimum energy efficiency standards for private rentals in England are targeted to rise to EPC C by 2030. The current floor is E. The 2030 target sits in the government’s Renters’ Rights Act implementation roadmap alongside the other standards measures, and while the detail — the cost cap, the exemptions, whether it bites at new tenancy or applies to all tenancies — is still being finalised, the direction has been consistent for long enough to plan around.
For landlords in Guildford this is not an abstract policy question. The local stock is heavy on Victorian terraces and interwar semis, and those are precisely the properties that sit at D and E.
What “EPC C” means for the housing you probably own
A modern flat is usually already C or better and needs nothing. A well-insulated 1990s house is generally a C. The problem cases are older and solid-walled.
A Victorian or Edwardian terrace typically lands at D or E. Solid brick walls, suspended timber floors, original or early replacement windows, and often a conversion layout that complicates everything.
A 1930s semi is usually a D. Cavity walls — which is good news, because cavity fill is the cheapest meaningful improvement available — plus a loft that may or may not be insulated to current depth.
A converted flat in a period building is the hardest case, because the improvements that would move the rating most are to the fabric of a building you only partly own.
What the work costs
The cheap measures first, because they do most of the work per pound.
Loft insulation to 270mm — a few hundred pounds, and often the single best value point on the certificate if the existing depth is 100mm or less.
Cavity wall insulation where there is a cavity — typically in the hundreds to low thousands, and a substantial rating improvement. Worth a borescope check first; a surprising number of interwar houses have been done already.
Hot water cylinder insulation, pipe lagging, low-energy lighting, and heating controls — small individually, but they accumulate on the assessment and cost very little.
A modern condensing boiler with proper controls — low thousands, and often the difference between a high D and a low C on its own.
Then the expensive measures, which is where the decisions get real.
Double or triple glazing across a whole house — several thousand upwards, more in a conservation area where the replacement has to be sympathetic.
Internal or external solid wall insulation — this is the big one, commonly five figures for a terrace, and internally it costs you room dimensions and every skirting, socket and radiator on the treated walls. It is also the measure most likely to cause moisture problems if specified badly, which matters more now that Awaab’s Law is heading for private rentals.
Solar, or a heat pump — worth modelling, particularly where the alternative is solid wall insulation. A heat pump in a poorly insulated house is a bad outcome for everyone; in a house that has already had the cheap measures, it can be the cleanest route to C.
Why starting now beats starting in 2029
Three reasons, and the third is the one that costs people money.
You can align the work with voids and tenancy changes. Solid wall insulation in an occupied house is disruptive to the point of being impractical. Done during a void it is merely expensive. A void you were having anyway is the cheapest window you will get.
Grant funding and contractor availability are both better before the rush. Every previous MEES deadline produced a squeeze on assessors and installers in the final year, with prices to match.
Your EPC is probably out of date, and may be wrong. EPCs last ten years, so a certificate from 2017 or 2018 predates work you may have done and uses an older assessment methodology. A fresh assessment sometimes finds the property is already closer to C than the old certificate suggests — and sometimes finds the opposite, which you would rather know in 2026 than 2029. How EPC ratings are assessed and what moves them.
The compliance angle
Your EPC is one of the documents that will sit on your entry when the PRS Database opens for registration from late 2026. An F or G rating on a publicly visible register is a marketing problem as well as a compliance one, well before 2030 arrives.
It is also worth being clear about what is and is not confirmed. EPC C in 2030 is a target with detail still to settle. The Decent Homes Standard for private rentals is proposed considerably later — 2035 or 2037, subject to consultation. Awaab’s Law extension to the private sector is subject to consultation with the date still to be confirmed. Anyone telling you all three land together is guessing. The confirmed position on what is already in force is in our Renters’ Rights Act guide.
What to do this year
Get a current EPC on anything with a certificate older than five years, and read the recommendations page rather than just the letter. That page is a costed improvement plan someone has already written for you.
Do the cheap measures now, regardless of the current rating — loft, cavity, cylinder, controls, lighting. They pay back in tenant bills and rating points and they are not going to get cheaper.
Model the expensive measures per property and decide which properties you want to keep. For a marginal property, a five-figure insulation bill in 2029 may be the point at which selling makes more sense than improving — and if that is the answer, the 16-month lead time on Ground 1A means that decision needs taking well ahead of the deadline, not at it.
General information, not legal advice. Property Lounge, Guildford.
Need a second opinion?
We’re Property Lounge, an ARLA Propertymark accredited lettings agency in Guildford. If anything above raised a question about your own property, we’re happy to talk it through — whether or not you’re a client, and whether or not you ever become one. No charge, no obligation, and we won’t chase you afterwards.
You can see how our fully managed lettings service works, what it costs, or book a free rental valuation.
Call 01483 369209 or email lettings@propertylounge.co.uk.
