Pro Tool
Predict Your EPC Rating. Plan Your Upgrades.
Estimate your property's Energy Performance Certificate rating and find the most cost-effective improvements to meet minimum EPC requirements for landlords.
Unlock EPC CalculatorRating Estimator
An EPC assessment costs £60-£120. Propty lets you estimate your rating first — so you know whether to invest in improvements before booking. Input your property's age, construction, heating, and insulation to get an estimated band and score.
Upgrade Planning
Not all improvements are equal. Loft insulation might cost £400 and add 6 points, while a new boiler costs £3,000 and adds 8 points. Propty ranks every upgrade by cost-per-point so you can spend smart.
An EPC calculator online gives a reasonable indication from the details you enter — age, construction, heating, insulation and glazing. It is not a substitute for a certificate: only an accredited assessor using the Standard Assessment Procedure can issue one. Use the estimate to decide whether improvements are worth making, then book an assessment to certify the result.
Rental properties in England and Wales must currently have a minimum EPC rating of E. That rises to C for every tenancy — new and existing — on 1 October 2030. The earlier proposal for a phased rollout starting in 2028 was scrapped in favour of a single deadline. Our calculator shows whether your property meets both the current and the 2030 requirement.
It depends on your starting point and target. Loft insulation (£300-£600) and cavity wall insulation (£500-£1,500) are the cheapest high-impact upgrades. A new condensing boiler costs £2,000-£4,000. Double glazing a 3-bed house costs £4,000-£7,000. Our calculator shows the most cost-effective path for your property.
An online estimator gives a reasonable indication based on the information you provide, but it's not a replacement for a certified EPC assessment. Real EPCs are calculated using the Standard Assessment Procedure (SAP) which is more detailed. Use our tool for planning — then book an official assessment when ready.
If your property is below an E rating, you cannot legally let it in England and Wales. Penalties are up to £5,000 per property. You can apply for a cost-cap exemption if you have spent up to £3,500 on improvements and still cannot reach E. From 2030 the standard rises to C with a higher £10,000 cap, and a matching 10-year exemption if the cap is spent and C is still out of reach.
Research suggests properties with higher EPC ratings sell for a premium — estimated at 5-15% more than equivalent properties with lower ratings. Beyond the value uplift, better ratings also reduce energy bills, making your property more attractive to tenants and reducing void periods.