Energy assessors will now collect and record more specific information about a property, including types of glazing and their condition, heating system efficiency based on evidence such as model numbers or manufacturer data, and the presence of smart heating controls.  

Home improvements, such as added insulation or new windows, will only be reflected if evidence is available.

Going forward, accurate records and receipts will be critical—especially for insulation, heating upgrades and double glazing.

“EPC ratings might initially drop if no evidence is provided, even if improvements have been made, so having a clear paper trail can protect property owners from unnecessary retrofit costs.”