Your EPC is a starting point.
Use it to plan the next step.

1. Read the recommendations before buying equipment.

Look at the current certificate, its date and the recommended measures. If the building has changed or the report is unclear, discuss the appropriate assessment with the energy assessor.

2. Understand the building and the bills.

An EPC uses a standard assessment method; it is not a forecast of your household’s exact bills. Heating, insulation, ventilation, occupancy and energy tariffs all affect the practical outcome of improvements.

3. Put the right work in the right order.

Ask the assessor which measures are appropriate for the property. Jelvis can then review the relevant electrical work, lighting, heating controls, solar PV or battery options within its service scope. Other building measures may need separate specialists.

4. Keep the rating and the financial case separate.

A particular EPC result should not be promised before assessment. Equally, the usefulness of solar PV or storage depends on generation, electricity demand, tariffs and equipment costs. Discuss both objectives instead of assuming one number tells the whole story.

5. Keep evidence and check whether reassessment is needed.

Retain the specification, invoices, installation documents and certification for completed work. Ask the assessor what evidence is needed and whether a new EPC should be produced after the changes.

For landlords

Start with the current certificate and the rules that apply to the property. Avoid commissioning work solely on a headline about a future deadline. The assessment method, exemptions and applicable legal requirements need to be checked.

Official reference: GOV.UK Energy Performance Certificates. Information checked 12 October 2026.