The common trigger
A valid EPC is generally required when a property is built, sold or rented. The certificate provides an energy-efficiency rating and recommendations, but it is not a building survey or a guarantee of running costs.
There are exemptions and special cases. Owners should use current government guidance or obtain appropriate professional advice when their situation is unusual.
Before marketing a home
For a sale or letting, check the official register early. If a valid certificate is unavailable, arrange the assessment before marketing deadlines create avoidable pressure.
Editorial boundary
This guide provides general orientation and links to official sources. It is not legal advice, a property-specific assessment, a building survey or a retrofit design.