Date Published 05 June 2025
Landlords, be aware: major changes to how Energy Performance Certificates (EPCs) are assessed come into effect this month and they could impact your property's rating.
What's Changing?
The new rules are part of an overhaul to the Reduced Data Standard Assessment Procedure (RdSAP) which is defined as the method behind EPCs. Assessors will now:
• Require proof of home improvements
• Collect more detailed property data (glazing, heating systems, smart controls, etc.)
• Use updated methods for calculating insulation and heat loss—especially for flats and mid-terrace homes
No Paperwork = Lower EPC Score
If you've made upgrades—like insulation or a new boiler—but can't provide documentation, your EPC rating might actually drop. Previously, default estimates were used. Now, no evidence means no credit.
What You Should Do Now
Start pulling together any documents that prove your property's energy improvements:
• Insulation certificates
• Boiler model numbers or manuals
• Glazing receipts or invoices
• Smart heating control details
Keeping accurate records protects your investment and may help avoid unnecessary retrofit costs.
Industry Response
Trade body Propertymark, which has conducted an in-depth analysis of the changes, welcomes the improvements. 'We support efforts to make EPCs more robust and meaningful,' the organization stated. However, it has also raised concerns. 'We continue to push for clear guidance and support for landlords and agents to navigate these changes, realistic implementation timelines, and funding to help cover the cost of necessary improvements—particularly for small landlords.'
Need Help?
We recommend speaking with your letting agent or EPC assessor for guidance on how to prepare. Expect tighter standards—but also more accurate scores for well-documented homes.
With a vast amount of scrutiny currently focused on the Renters' Rights Bill, it would be interesting to see how the government approaches the incoming changes to EPCs; as your relied upon Agent, Adams Estates will ensure to keep our clients informed regarding these developments.
