Glossary
What Is an Energy Performance Certificate (EPC)? Plain-English Guide (2026)
Definition: A document rating a property's energy efficiency from A to G
Energy Performance Certificate (EPC) Explained
An Energy Performance Certificate (EPC) rates a property's energy efficiency on a scale from A (most efficient) to G (least efficient). EPCs are required when selling or renting a property in England Wales and Scotland.
How Does a Energy Performance Certificate (EPC) Work?
- A qualified energy assessor visits and surveys the property
- Assessor inputs data into approved SAP calculation software
- Report generated showing current and potential EPC rating
- Certificate valid for 10 years and lodged on the national register
Pros and Cons of a Energy Performance Certificate (EPC)
| Pros | Cons |
|---|---|
| Legal requirement gives buyers and tenants clear efficiency info | Rating based on modelled not actual energy use |
| Includes recommendations for improving the rating | Quality depends on the assessor's thoroughness |
| Valid for 10 years reducing repeat costs | Improvement recommendations can be generic |
| Publicly searchable on the national register | Does not account for renewable energy tariffs or smart tech |
Frequently Asked Questions
What is an Energy Performance Certificate (EPC)?
A document rating a property’s energy efficiency from A to G
How does an Energy Performance Certificate (EPC) work?
An Energy Performance Certificate (EPC) rates a property’s energy efficiency on a scale from A (most efficient) to G (least efficient). EPCs are required when selling or renting a property in England Wales and Scotland.
Why is an Energy Performance Certificate (EPC) important for homeowners?
Understanding energy performance certificate (epc) helps you make informed decisions about energy improvements to your home and may affect the grants, savings and payback periods available to you.
Is an Energy Performance Certificate (EPC) relevant to home energy improvements?
Yes — energy performance certificate (epc) is a key concept in home energy improvements. It may affect system sizing, efficiency and eligibility for government grants and incentives.
Where can I learn more about energy performance certificate (epc)?
You can find more information on renewable energy terminology and policy by searching online or consulting with a qualified installer in your area.