Read the rating in context
An EPC rates a home from A, the most energy efficient, to G, the least. It also includes information about energy use and suggested improvements. The GOV.UK EPC overview explains the basics.
Check that you have the certificate for the correct home, including the right flat number. Keep the full report with your records so you can refer to the detail when discussing it with an agent, assessor or installer. A rating letter alone leaves little room for that conversation.
Treat cost figures as estimates
The assessment uses standard assumptions about occupancy, so the figures may differ from how you use your home. The potential rating reflects recommended improvements being carried out; it is not the property’s current rating. The government’s detailed EPC guide explains these calculations and recommendations.
When planning your own budget, keep your energy bills and the certificate side by side. If a figure surprises you, write down the question before assuming that either document is wrong.
Use recommendations to start a discussion
Read the proposed measures in full and make a shortlist of the ones you want to investigate. Before committing to work, ask an appropriate professional about suitability for your home, the complete cost and any permissions you may need.
If several changes are being considered, ask how they would fit together and which decisions need to come first. Keep written quotes and advice with your property records. Avoid budgeting on the assumption that a recommendation guarantees a particular saving or future rating.
Raise questions about the detail
If something appears incorrect, note the exact section and gather any relevant paperwork before contacting the assessor. An EPC concerns energy performance; it does not confirm that heating equipment is safe or properly maintained, as the detailed government guide explains. Keep questions about equipment safety or condition for an appropriate specialist.
Landlords should also check the rules that apply to their property and tenancy before deciding what action is needed.
Last reviewed 17 October 2026. General information only; property requirements and service scope need checking for your circumstances.