If you’re selling or letting a property in Thetford, there’s an important update to Energy Performance Certificates (EPCs) you should be aware of. New rules have just come into effect, changing how EPCs are assessed and prepared. Here’s what it means for you.
What is an EPC?
An Energy Performance Certificate (EPC) measures how energy efficient a property is, rated from A (most efficient) to G (least efficient).
It considers factors such as insulation, heating systems, double glazing, and lighting efficiency, helping buyers and tenants understand how costly a property might be to run.
When do you need an EPC?
You must have a valid EPC when marketing your home for sale or rent.
EPCs are valid for 10 years, so if yours has expired (or you’ve never had one), you’ll need to get an updated certificate before putting your property on the market.
What’s changed in 2025?
The new rules affect how domestic energy assessors calculate EPC ratings.
As of this month, assessors must use the updated Reduced Data Standard Assessment Procedure (RdSAP 10).
In simple terms, it means assessors can no longer make as many assumptions about your property — they’ll need to collect more detailed evidence and documentation to produce an accurate report.
This includes checking things like:
• Wall and loft insulation
• Ventilation systems
• Double glazing
• Heating and hot water systems
The goal is to make EPCs more accurate and consistent across all homes.
What does this mean for homeowners?
Because the new rules are more detailed, some properties could see their EPC rating change — either slightly higher or lower than before.
The extra checks may also increase the time and cost involved in preparing an EPC, though this will vary depending on the assessor and property type.
If you already have a valid EPC, you don’t need to do anything until it expires.
When you next need one — for example, to sell or let your property — your assessor will handle everything. Just be ready to share any relevant paperwork (like insulation certificates or boiler installation details) to make the process smoother.
The takeaway for Thetford homeowners
There’s no reason to worry about the new EPC rules. They’re designed to make ratings more accurate and fair, helping both buyers and sellers make better-informed decisions.
If you’re planning to sell your home in Thetford and need a new EPC or advice on how your rating could affect your sale, our team can help. We also offer free property valuations and honest advice on marketing your home effectively.
Article by Andrew Overman | Partner | Location Location East
