EPC Ratings for Rental Properties: The 2030 Minimum C Requirement
The current minimum EPC rating for rental properties is E. The government has signalled this will rise to C by 2030. If your property is rated D or E, the clock is ticking — and early action will save you money.
Energy Performance Certificates have been a legal requirement for rental properties since 2008. Since April 2020, the minimum rating for existing tenancies has been E — meaning you cannot legally let a property rated F or G without a valid exemption.
The next change is bigger. The government has proposed raising the minimum to C for new tenancies from 2028, and for all tenancies by 2030. While the exact timeline may shift, the direction of travel is clear: landlords with poorly insulated properties need to act.
The Current Rules
Right now, you must have a valid EPC (they last 10 years) and the rating must be at least E. If your property is rated F or G, you must either improve it to E or register a valid exemption on the PRS Exemptions Register. Letting without a valid EPC or with a rating below E carries a fine of up to £5,000.
An EPC costs between £60 and £120 and is carried out by a qualified Domestic Energy Assessor. They assess insulation, heating systems, windows, and other factors to calculate the energy efficiency rating from A (most efficient) to G (least efficient).
What the Minimum C Requirement Means
According to government data, approximately 55% of rental properties in England are currently rated D or below. If the minimum rises to C, over half of all landlords will need to make improvements or face being unable to let their properties legally.
The most common improvements needed to move from D to C include:
Loft Insulation (Top Up)
Cost: £300–£600. Topping up loft insulation to 270mm is one of the cheapest and most effective improvements. Many properties already have some insulation but not enough to meet modern standards.
Cavity Wall Insulation
Cost: £500–£1,500. If the property has unfilled cavity walls, this is high impact and relatively affordable. Not all properties are suitable — pre-1920s solid wall properties will need different solutions.
Boiler Upgrade
Cost: £2,000–£4,000. Replacing an old G-rated boiler with a modern A-rated condensing boiler can shift the EPC by one or two bands. The Boiler Upgrade Scheme offers grants of £5,000 towards heat pumps as an alternative.
Double Glazing
Cost: £3,000–£7,000 for a full house. Expensive, but has a significant impact on EPC rating and tenant comfort. If you still have single glazing, this is likely unavoidable for reaching C.
LED Lighting
Cost: £100–£300. Small impact on its own, but contributes to the overall rating and is the easiest improvement to make. Replace all halogen and incandescent bulbs with LEDs.
Why Acting Early Saves Money
When the minimum C deadline hits, every landlord with a D or E property will be competing for the same insulation contractors, boiler installers, and window fitters. Prices will rise and waiting times will extend — just as they did when the minimum E requirement came into force.
By starting improvements now, you get better availability, competitive pricing, and time to spread costs across multiple tax years. You also benefit from lower energy bills (which tenants appreciate) and potentially higher rental values for better-rated properties.
The Spending Cap
The government previously proposed a spending cap of £10,000 per property for energy improvements. If you spend up to the cap and still cannot reach C, you may be able to register an exemption. However, the final details of the cap and exemption process for the new C minimum have not been confirmed, so plan on reaching C if at all possible.
Keep Your EPC Tracked
EPCs last 10 years, so it is easy to lose track of when yours expires. If it expires and you do not renew it, you are letting without a valid certificate — a fine of up to £5,000. And when the minimum rises to C, an expired EPC means you cannot prove your property meets the standard.
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