What’s happened?
In mid-June 2025, the UK launched RdSAP 10, the first major overhaul of the domestic EPC calculation method in over a decade. From 16th June, all domestic EPCs must be done using the new methodology
What’s changed?
Under RdSAP 10, assessors now collect much more detailed and precise data on each property during EPC assessments — including:
Measuring every window individually, and noting frame type, glazing gap, orientation
Recording precise wall and loft insulation measurements
Detailing ventilation types, lighting types, hot water tanks, air-tightness, and renewable tech
This extra time on site adds roughly 25–40% more inspection time, especially on average homes
Why prices are going up?
To ensure accurate, compliant reports, assessors must:
Stay on site longer (fewer jobs per day)
Invest in additional training, upgraded tools, and software
Spend more time processing and verifying data post-visit
Why the change matters?
EPCs are now more accurate and reflective of real conditions
The new method benefits well-documented, energy-efficient homes
But properties without proper records could even lose rating bands
Your next steps
Your next steps
Ask assessors for a breakdown of the new methodology and time requirements
Gather proof of any home improvements (e.g., invoices for insulation, glazing, heating upgrades)
Bottom line
Yes — EPC prices have risen following the RdSAP 10 update. But this ensures:
Better, more accurate assessments
Longer, more thorough site visits
Qualified assessors using improved tools and training
We understand it’s a financial consideration — and that’s why we’re committed to fair, transparent pricing and expert service. If you’re planning to let, sell, or retrofit, talk to us to secure a rate before prices settle in — and to make sure your assessment reflects your property’s value.