Published 2026-05-12 · KentLoop Property Guides

EPC Requirements: Energy Performance Certificate Rules for Buyers and Landlords

An Energy Performance Certificate (EPC) is a document that rates a property's energy efficiency on a scale from A (most efficient) to G (least efficient). EPCs are required by law in many property transactions and rentals, and the rules around minimum energy standards are evolving — particularly for landlords.

Understanding EPCs matters whether you're buying, selling, or renting a property.

What Is an EPC?

An EPC contains:

• An energy efficiency rating (A–G) based on estimated running costs
• An environmental impact rating (carbon dioxide emissions, also A–G)
• The property's estimated energy costs for heating, lighting, and hot water
• Recommendations for improving the rating and their estimated costs and savings
• Reference information including floor area and main heating fuel type

EPCs are produced by accredited Domestic Energy Assessors (DEAs) following a site visit and assessment of the property's construction, insulation, heating, windows, and services.

When Is an EPC Required?

Selling a Property

A valid EPC must be available before a property is marketed for sale. It must be provided (or made available) to prospective buyers. If you are selling, you must have an EPC ordered before the first advertisement goes live.

Who arranges it: The seller or their estate agent. Cost is typically £60–£120.

Renting a Property

Landlords must have a valid EPC before marketing a rental property. The certificate must be provided to prospective tenants.

Current minimum standard for rental properties: E or above (EPC rating must not be F or G).

Important upcoming change for landlords: The government has proposed raising the minimum EPC rating for rental properties to C in England. Under current proposals, this requirement would apply to new tenancies first, then existing tenancies. The timeline has been subject to consultation and revision — landlords should monitor gov.uk and seek professional advice on current requirements.

Buying a Property

Buyers are entitled to see the EPC before completing a purchase. For older properties in particular, the EPC rating gives useful information about likely energy running costs and the scale of improvement works required.

EPC Ratings Explained

The average EPC rating in England is D. Most homes built after 2000 achieve C or above with standard insulation.

How Long Is an EPC Valid?

EPCs are valid for 10 years from the date of issue. A new EPC is only required if the existing one has expired. If you've done substantial energy improvement work (new boiler, insulation, solar panels), it may be worth getting a new EPC to reflect the improved rating even before the existing one expires.

What Affects an EPC Rating?

Key factors that influence the rating include:

• Wall insulation — cavity wall insulation and solid wall insulation are major factors
• Loft insulation — depth and coverage matter significantly
• Heating system — boiler type, age, and efficiency; heat pumps score very well
• Windows — double or triple glazing vs single-glazed
• Hot water system — combi boiler vs tank; presence of solar thermal
• Lighting — proportion of LED vs non-LED
• Renewable energy — solar PV panels can significantly improve the rating

Improving an EPC Rating

Common improvements recommended in EPC reports include:

• Cavity wall insulation (£500–£1,000 installed) — can improve rating by up to 5 points
• Loft insulation (£300–£600 for 270mm depth) — often the most cost-effective measure
• A-rated boiler replacement — modern condensing boilers are significantly more efficient
• Solar photovoltaic panels (£5,000–£10,000) — can dramatically improve the rating
• Air source heat pump (£8,000–£15,000 installed) — scores very well in EPC methodology; government grants available
• Double glazing — especially impactful on older single-glazed properties

EPC Implications for Buyers

As a buyer, the EPC provides:

1. Running cost estimates — useful for budgeting, though actual costs depend on usage behaviour
2. Improvement roadmap — recommended works and estimated savings help you plan upgrades
3. Lending implications — some lenders offer preferential "green mortgage" rates for A/B-rated properties, and some are beginning to apply stricter criteria for lower-rated properties
4. Value consideration — energy efficiency is increasingly a factor in buyer demand, particularly as energy prices remain elevated

If you're buying a property with a poor EPC rating, factor improvement costs into your offer calculation.

EPC Implications for Landlords

The current minimum standard (EPC E) means landlords cannot legally rent a property rated F or G without a valid exemption. Exemptions exist where:

• Improvements are not technically feasible
• The cost of reaching E would exceed a specified cap (currently £3,500)
• The work would require third-party consent (e.g. listed building consent) that cannot be obtained
• The property would be vacated within 6 months

Landlords should register any exemptions on the PRS Exemptions Register.

Given the proposed move to EPC C minimum, landlords with D or E properties face significant investment decisions. Early assessment and planning is advisable.

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Disclaimer: This guide is provided for general information purposes only and does not constitute legal, financial, or professional surveying advice. EPC regulations, minimum energy standards for rental properties, and government schemes change regularly. Always verify current requirements at gov.uk and consult qualified professionals before making decisions about property improvements or compliance. KentLoop is a directory service and does not provide regulatory or compliance advice.