EPC Surveys Explained: What Every UK Homeowner Needs to Know in 2025

Energy Performance Certificates have been a legal requirement for most UK properties since 2008, but many homeowners still don't fully understand what they involve, what the ratings mean, or how they affect property values and rental income.

With the government's push towards net zero and new minimum EPC requirements for rental properties on the horizon, understanding your EPC has never been more important.

What Is an EPC Survey?

An Energy Performance Certificate (EPC) is a document that rates the energy efficiency of a property on a scale from A (most efficient) to G (least efficient). It also provides recommendations for improving the property's energy performance.

An EPC survey is carried out by a qualified Domestic Energy Assessor (DEA) who visits the property and collects data on its construction, insulation, heating systems, windows, and other energy-related features.

• The survey typically takes 45–90 minutes for a standard residential property
• The assessor will inspect the loft, walls, windows, boiler, and heating controls
• No destructive investigation is required — it's a visual assessment
• The certificate is valid for 10 years from the date of issue
• EPCs are lodged on the national EPC register and are publicly accessible

When Do You Need an EPC?

You are legally required to have a valid EPC in several situations. Failing to provide one when required can result in fines of up to £5,000.

• When selling a residential property
• When renting out a property to new tenants
• When constructing a new building
• When making certain types of major renovation
• When applying for some types of green energy grants or schemes

Understanding EPC Ratings

EPC ratings run from A to G, with A being the most energy efficient and G the least. The rating is based on a score out of 100, calculated using the Standard Assessment Procedure (SAP).

The average UK home currently sits at band D (55–68 points). Most modern new builds achieve band B or above. Older Victorian and Edwardian properties often fall into band E or F without significant improvements.

• Band A (92–100): Highly efficient — typically new builds with solar panels and heat pumps
• Band B (81–91): Very efficient — well-insulated modern properties
• Band C (69–80): Good efficiency — the government's target for all rental properties
• Band D (55–68): Average — most UK homes fall here
• Band E (39–54): Below average — common in older properties
• Band F (21–38): Poor — significant improvements needed
• Band G (1–20): Very poor — major works required

How to Improve Your EPC Rating

Improving your EPC rating can increase your property's value, reduce energy bills, and make it more attractive to buyers and tenants. The most cost-effective improvements depend on your property type and current rating.

• Loft insulation — one of the cheapest and most effective improvements
• Cavity wall insulation — significant impact for properties built after 1920
• Double or triple glazing — reduces heat loss through windows
• Upgrading to a modern condensing boiler — can improve rating by 5–10 points
• Installing a smart thermostat and heating controls
• Solar photovoltaic panels — can push a property from D to B
• Heat pump installation — increasingly popular for off-gas properties

How Much Does an EPC Survey Cost?

EPC survey costs vary depending on the size and type of property, and the assessor you use. At Page Building Consultants, we offer competitive fixed-price EPC surveys with fast turnaround times.

For most standard residential properties, you can expect to pay between £60 and £120 for a professional EPC survey. Commercial EPCs are priced separately based on the size and complexity of the building.

We cover the whole of the UK and can typically arrange a survey within 24–48 hours of your enquiry. Call us on 0800 688 9321 or use our online contact form to get a quote.