Look up Energy Performance Certificates for any UK postcode. See current and potential energy ratings, estimated annual costs, and property construction details. Data from the official EPC Register.
Quick answer
EPCs rate UK homes from A (most efficient, <£500/yr) to G (least efficient, often >£3,000/yr). Most UK homes sit at D (~£1,200–£1,800/yr). Lettings of properties below E are illegal in England and Wales. Each certificate lasts 10 years and lists the cheapest improvements to upgrade the rating. Enter any postcode below to see local properties and their certificates.
What an EPC tells you
An Energy Performance Certificate rates a property's energy efficiency from A (most efficient) to G (least efficient), with a numeric score from 1 to 100. The certificate also estimates annual energy costs, lists the property's heating and insulation features, and recommends improvements with cost and saving estimates. Every property sold or rented in England, Wales and Northern Ireland must have a valid EPC.
EPCs matter more than they used to. Lenders use them to assess green-mortgage eligibility. Landlords need at least a band E to rent legally, with a proposed minimum of C from 2028. And many mortgage providers now offer better rates on properties rated C or above. The EPC also tells you a lot about the renovation work needed to make a home efficient and comfortable.
EPC band thresholds
A
Score 92 to 100
B
Score 81 to 91
C
Score 69 to 80
D
Score 55 to 68
E
Score 39 to 54
F
Score 21 to 38
G
Score 1 to 20
Frequently asked questions
How long is an EPC valid?
10 years from the date of inspection. After that you'll need a new one if you sell or rent the property. Many sellers already have a recent EPC on file because it was required when they bought the property.
Why do most UK homes score band D or E?
Most of the UK housing stock was built before modern insulation standards. The average UK home scores around 67 (high D, low C). Pre-1900 properties typically score in band E or F unless retrofitted. New builds since 2010 mostly land in band B or C.
Can I improve my EPC rating?
Yes. The EPC itself includes recommendations with cost and saving estimates. The biggest gains usually come from cavity wall insulation (£400 to £900 cost, around £250/yr saving), loft insulation (£250 to £400 cost, around £200/yr saving), and upgrading old boilers. Solar PV and double glazing are higher impact but cost a lot more upfront.
Does Scotland use the same EPC system?
Scotland uses a separate but very similar system, also rated A to G. Scottish EPCs are managed via the Energy Saving Trust rather than the England and Wales register, so this checker covers England and Wales only.
What does 'assumed' mean on an EPC?
EPC assessors don't usually open up walls or remove insulation to inspect. Where they can't see, they assume based on the construction date and visible features (e.g. 'Pitched, insulated (assumed)' for a typical post-1980 house). Assumed entries are estimates, not measurements. The actual situation may be better or worse.
Why do landlords care about EPC ratings?
Since 2018 it's been illegal to grant new private tenancies on properties rated F or G. Existing tenancies became compliant from 2020. The proposed minimum is rising to C for new tenancies in 2028 and all tenancies in 2030, though the timeline has shifted before. Landlords with band D or E properties should plan upgrades now.
How does an EPC differ from a building survey?
An EPC is a 30-minute energy assessment focused on running costs and efficiency. A building survey (Level 1, 2 or 3) is a much more thorough inspection of the property's structural condition, defects, and required repairs. EPCs are mandatory. Surveys are optional but strongly recommended before purchase.
Does the EPC affect my mortgage?
Increasingly, yes. Most major UK lenders now offer 'green mortgage' rate reductions of 0.05% to 0.15% for properties rated A or B. Some lenders apply a small rate uplift to F and G rated properties because of regulatory risk and lower expected resale value. Check your specific lender's policy before assuming either way.
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