In its response to the Warm Homes Plan, the Energy Saving Trust welcomed new energy efficiency standards for the private rented sector as essential to tackling fuel poverty — making the point that private renters are among the most likely to live in cold, damp homes and the least able to do anything about it.

That is the policy logic. Here is the practical consequence for a landlord.

The standard, precisely

Privately rented homes in England and Wales must reach a C-equivalent standard by 1 October 2030. This is a confirmed date rather than a consultation position — a meaningful change, given how many times it previously moved.

Two details matter as much as the date itself:

  • The cost cap is £10,000 per property, up from £3,500.
  • A second standard applies alongside the rating — either heating system performance or smart readiness, with the choice left to the landlord.

Around 60% of privately rented homes currently sit at D or below, so this is a majority-of-the-sector problem rather than a tail-end one.

Why starting now is worth real money

Certificates last ten years, and a property that reaches C before 1 October 2029 is treated as compliant until that certificate expires. Work done now can therefore carry a property past the deadline without a second assessment.

That is not a loophole — it is how certificate validity has always worked — but it does mean the value of acting early is concrete rather than merely prudent. It also means the worst strategy is to wait until 2029, when every landlord in the country is competing for the same assessors and the same installers.

Where to spend first in a London rental

In our experience the order that moves the band most reliably in London stock is: loft insulation where a loft exists, then heating controls, then the boiler if it is old, then glazing. Solid wall insulation is the big lever but also the big cost and the big moisture risk.

The hardest case is the electrically heated ex-council flat with old storage heaters. Those weigh heavily in the calculation and replacing them is usually the only thing that shifts the letter — a planned capital job that wants budgeting for now, not discovering in 2029.

We work with London landlords across east and south London, including portfolios. See our landlord services or book an assessment.