RdSAP 10: What it means for Homeowners and Tenants
RdSAP 10 represents the most significant update to the calculation methodology used for generating Energy Performance Certificates (EPCs), in over a decade. It is scheduled for release on June 15, 2025.
We’ve been keeping Elmhurst assessors up to date with all the upcoming changes, but it’s also important to look at how these updates affect homeowners and tenants.
Why is this update important for homeowners and tenants?
This update will introduce several important changes to the way EPCs are generated and it’s important to understand what these changes mean. The new features and improvements in RdSAP 10 are designed to enhance the accuracy and reliability of energy performance assessments, ultimately providing you with more precise and useful information about your property’s energy efficiency.
We encourage homeowners and tenants to stay informed about these updates and how they may impact your property. Our team is here to provide our members with all the necessary information and support to ensure a smooth transition to the new system.
What’s changing?
With the release of RdSAP 10 on the 15th June, assessors will need to collect more detailed information during on-site visits. This includes measuring all windows, identifying different types of ventilation, and noting wall types and constructions, among other details.
Previously, assessors had to make some assumptions due to software limitations, which meant certain aspects of the property couldn’t be recorded accurately. Now, with RdSAP 10, assessments will be much more precise, with detailed data and evidence submitted into the software.
What does this mean for my EPC assessment?
These improvements aim to provide a more accurate Energy Performance Certificate (EPC) for your property. This means the EPC you receive will better reflect your property’s energy performance, helping you make more informed decisions about improvements and upgrades.
To collect the additional data required by RdSAP 10, assessors will need to spend more time at your property. This reflects the increased detail and rigour of the new methodology, which enhances the quality and reliability of each EPC. As a result, you will likely notice a change in the cost of your EPC; this supports the delivery of a more comprehensive assessment and ensures that assessors are fairly compensated for the professional service they provide.
What are Elmhurst doing to help with the transition to RdSAP 10?
It’s important to note that Elmhurst Energy do not produce EPCs but we do support energy assessors that do. We provide comprehensive guidance and ongoing support to assessors, whilst regularly auditing their work to ensure they perform at their best and feel fully supported within the industry. Throughout the lead up to RdSAP 10, Elmhurst have been sharing a range of resources with members to make sure they are up to speed with all the changes and know what to expect.
Caroline Postles, Existing Dwellings Technical Team Leader, explains:
“The standards that EPCs must reflect are set by governing bodies, not by Elmhurst. However, we’ve developed the software, methodology and training needed to align with these updates. Our role is to provide comprehensive support, guidance and technical assistance to assessors, ensuring they have the tools and knowledge required for a smooth and confident transition to RdSAP 10.”
