EPC Ratings for Rental Properties in 2026

The EPC rating for rental property is the single compliance item that has moved the most in the last decade and is going to move again in the next one. An Energy Performance Certificate is a government-mandated document that scores a property's energy efficiency from A to G, and the minimum rating at which a property can be legally let has steadily climbed. For London landlords, many of whom own in period buildings with solid walls, sash windows, and underfloor draughts, the arithmetic of hitting a higher minimum is different, and more expensive, than for the rest of the country. This guide explains what an EPC is, what the rating actually measures, the current and upcoming minimum standards, the improvements that move the needle fastest for London stock, and how AIHPG arranges EPCs for landlords as part of the standard service.

What is an EPC and what does the rating mean?

An EPC, Energy Performance Certificate, is a formal assessment of how energy-efficient a dwelling is. It is produced by a qualified Domestic Energy Assessor after an on-site survey and modelled through government-approved RdSAP software. The headline output is a rating from A (most efficient) to G (least efficient), shown on a colour-coded scale from dark green to red. The certificate includes a second graph showing the property's environmental impact (CO2 emissions), a list of recommended improvements ranked by cost and impact, and an indicative annual running cost. The certificate is valid for ten years from the date of issue, and the same certificate is legally required for both selling and letting, there is no separate "landlord EPC".

EPC rating requirements for rental property

The legal framework that governs the EPC rating for rental property is the Minimum Energy Efficiency Standard, MEES, introduced for new tenancies in 2018 and extended to all tenancies in 2020.

The Minimum Energy Efficiency Standard (MEES)

MEES prohibits the letting of a residential property in England or Wales with an EPC rating below the prescribed minimum. The standard applies to almost every assured tenancy, assured shorthold tenancy, and regulated tenancy, the main exemption being genuine holiday lets of fewer than four months per year. Enforcement is by the local authority, and penalties scale with property value and the duration of the breach.

The current minimum rating

The current minimum EPC rating for letting a rental property is E. A property with an F or G rating cannot be let to a new tenant, and cannot remain let to an existing tenant, unless a valid exemption is registered on the government's PRS Exemptions Register. In practical terms this means a landlord with an F or G rated property has two options: invest to improve the rating, or register a valid exemption. There is no third option of doing nothing.

Upcoming changes to the minimum standard

The government's confirmed direction of travel is to raise the minimum rating to C for all private tenancies, new and existing alike, from 1 October 2030. An earlier phased plan for 2028 and 2030 was dropped in the government's January 2026 response, but the C target has been a consistent planning assumption across consultations. For London landlords, this matters particularly. The average EPC rating of UK housing stock sits around D; the average in London is slightly lower, because a disproportionate share of the stock is pre-1919 period housing with solid walls, timber sash windows, and limited insulation potential. Moving a D to a C is usually straightforward; moving an E or lower-D to a C can be a meaningful capital project. Our dedicated guide to the MEES regulations covers the confirmed EPC C standard and the exemptions in full.

When you need a new EPC

A new EPC is required when you sell or let a property, when a previous certificate has expired, or after significant energy-efficiency improvements (insulation, boiler replacement, solar PV) if you want the rating to reflect the upgraded position. A minor refurbishment does not require a new EPC. If a valid EPC is already on the register for the address, a new one is not legally required simply because the tenancy is changing, the existing certificate runs for its full ten years.

How an EPC rating is calculated

The EPC rating is produced using the government's RdSAP methodology, a standardised software model that takes the assessor's survey inputs and produces both an energy efficiency score (out of 100) and the corresponding letter band. The survey captures dwelling type, age band, wall construction, roof and loft insulation, floor type and insulation, windows (single/double/triple), heating system, hot water system, any secondary heating, any renewable generation (solar PV, solar thermal), and lighting type. The model does not measure actual energy use, it produces a modelled rating for a standardised occupancy pattern, which is why two identical flats with different tenants can have the same EPC.

What the A-to-G scale actually means

The rating bands are defined by EPC score ranges rather than a pure physical quantity. Broadly:

• A (92+): Very rare in existing stock, usually a new-build designed to Passivhaus or equivalent standards
• B (81–91): Typical of well-specified new-builds from the last decade
• C (69–80): The target for most rental properties under the minimum standard from 1 October 2030
• D (55–68): The current UK average; most well-maintained London flats sit here
• E (39–54): The current legal minimum for letting; typical of pre-1980 flats with older heating and modest insulation
• F (21–38): Below the legal letting standard, requires improvement or a registered exemption
• G (1–20): Below the legal letting standard, requires significant investment to reach E

How to improve a low EPC rating

Improving an EPC rating is a modelling exercise as much as a construction one, the biggest score gains come from the items the RdSAP model weights most heavily, which is not always where the biggest real-world energy savings are. For London flats the highest-yield improvements are usually: upgrading to a high-efficiency condensing boiler with modern controls; replacing all lighting with LED; improving loft insulation (for top-floor flats and houses) to at least 270mm; and, where practicable, internal wall insulation on cold exterior walls. Solar PV produces a significant rating jump but is only possible where the roof is accessible and the freeholder permits it. The recommended improvements printed on the certificate itself are a reasonable starting point and include indicative costs and band uplifts.

Cost-effective improvements for London rental properties

For the typical D-rated London flat, moving up to C usually requires two or three of the following: a modern combi boiler (if the existing one is over 10 years old and non-condensing), LED lighting throughout, top-floor loft insulation, cylinder insulation (if present), and a smart room thermostat. Total cost: £3,000–£6,000 for most flats. For E-rated properties, expect £6,000–£15,000 depending on whether internal wall insulation, window upgrades, or full heating replacement is required. Period properties in conservation areas have less flexibility on windows and external walls, and the improvement path usually runs through heating, insulation, and lighting rather than fabric. Sensible landlords combine EPC improvements with the end-of-tenancy decoration and renovation cycle, so the disruption to tenants is zero.

Exemptions from the MEES

A small number of MEES exemptions exist and must be registered on the PRS Exemptions Register to be valid. The most commonly used are: the high-cost exemption (where improvements to reach E would cost more than £3,500 in total), the consent exemption (where the tenant, freeholder, or planning authority refuses consent to the required work), the devaluation exemption (where a qualified surveyor certifies improvements would reduce market value by 5% or more), and the new-landlord exemption (a six-month grace window after acquisition). Exemptions last five years and must be renewed; they do not carry over to a new owner. A registered exemption is not a long-term solution. It is a holding position while a longer-term improvement plan is put in place.

How AIHPG handles EPCs for London landlords

EPCs are one of the compliance documents included as standard in our service bundles and let only with services plans. We arrange the assessor visit, issue the certificate to the tenant, file it against the property record, and diarise the ten-year renewal. For properties with a weak current rating, our property management team produces a costed improvement plan that targets the RdSAP-weighted items first, so every pound spent shifts the score as far as possible. Where work is best done between tenancies, our in-house decoration team integrates EPC improvements into the regular refresh cycle, which keeps both cost and disruption to a minimum.

The EPC sits alongside the gas safety certificate and the EICR as one of the three compliance documents every tenancy needs in place from day one. Under the Renters' Rights Act 2025 national property portal, all three will be visible to tenants and local authorities at the click of a button, so current is going to be the new default, not the goal.