Energy efficiency compliance is one of the most pressing issues facing UK landlords in 2026. Minimum EPC standards have already tightened once — and further changes are expected. This guide covers what landlords need to know right now.
Current Minimum EPC Standards
Since April 2020, all rental properties in England and Wales must hold a valid EPC with a minimum rating of E before being let to new tenants or having existing tenancies renewed. Properties rated F or G are illegal to let without a valid exemption registered on the government’s Private Rented Sector (PRS) Exemptions Register.
Penalties for Non-Compliance
Local authorities can issue compliance notices and impose fines of up to £5,000 for an initial breach, and up to £30,000 for a continuing breach. Fines are per property, not per landlord — portfolio landlords with multiple non-compliant properties face substantial exposure.
Scotland and Wales
Scotland has its own energy efficiency requirements under the Energy Efficiency (Domestic Private Rented Property) (Scotland) Regulations. Wales operates under a similar framework to England for EPC minimum ratings but has additional requirements under the Renting Homes (Wales) Act 2016. Landlords operating in Scotland or Wales should check the specific regulations applicable to their properties.
What Improvements Make the Biggest Difference?
For most F and G-rated properties, the path to an E rating (or higher) typically involves: loft insulation to a depth of at least 270mm; cavity wall insulation where the construction allows; replacing an old boiler with a modern A-rated condensing boiler with full controls; and installing double glazing where only single glazing is present. For properties already at E, the step to D or C typically requires heat pump installation, solar PV, or both.
Available Funding
The ECO4 scheme (Energy Company Obligation) provides free insulation and heating upgrades for eligible properties with low-income tenants. The Great British Insulation Scheme provides subsidised insulation for a wider range of properties. Landlords should check their eligibility before committing to privately funded improvements.