Energy Performance Certificates (EPCs): What Buyers and Sellers Need to Know
An Energy Performance Certificate - almost universally known as an EPC - is a document that rates the energy efficiency of a property on a scale from A (most efficient) to G (least efficient). EPCs are a legal requirement in the UK property market and affect both buyers and sellers. Understanding what they mean, when they are required, and what the ratings imply can save you time, money, and surprises.
What Is an EPC?
An EPC provides an assessment of a property's energy efficiency and its environmental impact. It includes a current energy efficiency rating (A-G), an estimate of typical energy costs, and a list of recommended improvements that could improve the rating. The certificate is produced by an accredited domestic energy assessor following an inspection of the property.
EPC ratings reflect the energy efficiency of the building itself - its insulation, heating system, windows, and other features - rather than the energy consumption habits of the current occupants.
When Is an EPC Required?
An EPC is legally required before a property can be marketed for sale or rent in England and Wales. gov.uk says you must order an EPC for potential buyers and tenants before you market the property to sell or rent. If you are selling a property and your existing EPC has expired (they are valid for 10 years), you must commission a new one before listing. See the government guidance on Energy Performance Certificates when selling a home.
There are some exemptions - listed buildings and certain protected structures may be exempt where energy efficiency improvements would unacceptably alter their character or appearance. The exact position depends on the property, so check the current gov.uk EPC guidance for your circumstances. Most residential properties require a valid EPC.
EPC Ratings Explained
| Rating | Description | Typical Properties |
|---|---|---|
| A (92-100) | Most efficient | New builds, Passivhaus |
| B (81-91) | Very efficient | Modern builds |
| C (69-80) | Good | Post-1980s homes, upgraded older stock |
| D (55-68) | Average | Most UK housing stock |
| E (39-54) | Below average | Older unimproved properties |
| F (21-38) | Poor | Pre-war solid-wall properties |
| G (1-20) | Very poor | Unimproved historic buildings |
Most modern and recently renovated properties achieve C or above, while a large share of older UK housing stock sits around D. You can look up the rating for any property with an existing certificate using the government's Find an energy certificate service.
Why Does the EPC Rating Matter for Buyers?
A property's EPC rating directly affects running costs. A home rated G will typically cost significantly more to heat and power than one rated C, and the certificate itself gives an estimate of typical energy costs. As energy prices have risen, buyers increasingly factor EPC ratings into their purchasing decisions and offers, and properties with poor ratings may be harder to sell or attract lower offers.
Some mortgage lenders now take energy performance into account, and a number offer "green mortgage" products with preferential terms for more efficient homes. Lending criteria vary by lender and change over time, so check directly with a lender or a regulated mortgage adviser rather than relying on general guidance.
EPC Requirements for Landlords
For rental properties, the minimum EPC rating a landlord must meet to let a domestic property in England and Wales is currently E under the Minimum Energy Efficiency Standard (MEES). Properties rated F or G cannot legally be let unless a valid exemption is registered. See the government's MEES landlord guidance.
The minimum standard is set to rise. Today the maximum fine is £5,000 per property, and you are not required to spend more than £3,500 including VAT (gov.uk MEES guidance). The government said on 21 January 2026 that all private rented homes in scope must meet a new standard - a target of EPC C, measured on the new EPC metrics, by 1 October 2030 - and it plans a £10,000 cost cap per property and a maximum fine of £30,000 per property per breach. The regulations that make this law have not been made yet and the higher figures need new legislation, so check gov.uk before relying on the detail (GOV.UK: improving the energy performance of privately rented homes - government response). Landlords with older D or E-rated stock should plan ahead, as reaching C can involve significant investment in insulation, glazing, and heating systems. Because the detail of the new regime can still develop, check the current gov.uk MEES guidance before committing to works.
How Much Does an EPC Cost?
Prices vary between assessors, so compare quotes from accredited assessors on the register. You can commission one through an accredited domestic energy assessor - find one through the government's Get a new energy certificate service or a reputable comparison service.
Can You Improve an EPC Rating?
Yes. Every EPC includes a list of recommended improvements ranked by potential impact. Common improvements include loft and cavity wall insulation, upgrading to a modern condensing boiler, installing double or triple glazing, adding solar panels, and switching to a heat pump. Some improvements may attract government grants - schemes and eligibility change frequently, so check the current position on gov.uk for any energy-efficiency funding you may qualify for before relying on it.
This article is for general guidance and reflects EPC and MEES requirements in England and Wales as of mid 2026. Regulations are subject to change. Always check the latest requirements with a qualified assessor or the relevant government guidance.
Last reviewed: 22 October 2026. This is general information, not legal advice - always check the current gov.uk guidance.