The cost of reaching EPC C
A straight look at the numbers: what upgrades typically cost, the £10,000 cost cap that limits your exposure, and how to spend the least by doing the cheapest, highest-impact measures first.
What the government expects it to cost
Government's own estimate puts the average upgrade at around £5,400 per property, though the real figure depends heavily on where your home starts. A well-built 1990s semi may need very little; a solid-wall Victorian terrace needs more. The complete guide explains why fabric now sits at the heart of the standard.
The £10,000 cost cap
You are not required to spend without limit. A cost cap of £10,000 per property applies over any ten-year period; homes worth under £100,000 have a reduced cap of 10% of their value. Qualifying spend is backdated to 1 October 2025, so work you do now counts towards it. If you reach the cap without hitting C, you can register an exemption — see exemptions and rules.
Cheapest points per pound, first
The way to spend least is to follow the fabric-first ladder. Loft insulation and draught-proofing are the cheapest measures and among the biggest EPC point-gains; cavity wall insulation is next where the walls suit it. Only after the fabric is sound does heating or generation earn its place. The full ladder is in how to improve an EPC rating.
How grants change the maths
Much of this can be grant-funded through ECO4, the Warm Homes: Local Grant and — for heat pumps — the £7,500 Boiler Upgrade Scheme, with VAT relief on insulation until 31 March 2027. In many cases grants bring your own contribution well below the cap, and on a first property it can be nil. The routes are set out in the grants guide.
Why acting early is cheaper
Grant funding is time-limited, prices rise, and installers get busier the closer we get to 2030. Landlords who plan now spread the cost, capture the grants while they last, and avoid the last-minute premium. A costed plan today tells you exactly what your properties need.
Free download: The Greater Manchester Landlord's EPC C 2030 Checklist
The fabric-first order of works and every duty on one page, so you spend on the right things in the right order.
Common questions
What is the most I will have to spend?
£10,000 per property over any ten-year period, or 10% of value for homes under £100,000. Beyond that you can register an exemption.
Does spend before now count?
Qualifying spend is backdated to 1 October 2025, so recent and current work counts towards both the standard and the cap.
What is the single cheapest way to add EPC points?
On most homes, loft insulation and draught-proofing — low cost, quick to fit, and often grant-funded.
Will I definitely have to pay something?
Not always. On a first eligible property grants can cover the work entirely; contributions, where they apply, stay within the cap.
Read next: The complete EPC C 2030 guide · Grants for GM landlords · How to improve an EPC rating · Exemptions and rules