New build EPC and SAP calculation.
Understand the difference between new-dwelling SAP calculation work and the accredited process that produces and lodges a new build EPC.
How does a new build EPC relate to SAP?
For dwellings, the government Standard Assessment Procedure is used to estimate energy performance and supports new-home compliance and EPC production. The applicable version and transitional rules depend on jurisdiction and project dates, while the official certificate still requires the approved software and accredited-assessor process.
Design calculation
The model records the proposed dwelling fabric, systems and other controlled inputs for compliance review.
As-built update
Changes made during construction must be reflected in the final assessment evidence.
Certificate and lodgement
A calculation report is not itself a lodged EPC. The accredited production route remains separate.
What information supports a new build EPC?
Use controlled project evidence rather than assumptions carried forward from an early design model.
- 1
Confirm jurisdiction and project dates
Check the current approved methodology and any transitional provisions for the project.
- 2
Build the design-stage model
Record the dwelling geometry, fabric, openings, thermal bridging, ventilation, heating, hot water, lighting and renewables.
- 3
Track construction changes
Keep product and commissioning evidence aligned with what was installed.
- 4
Complete the as-built assessment
Resolve changes and required evidence before the accredited certificate process.
Which official sources support this answer?
The links below own the register, assessment or methodology claim. Check them again when making a current regulatory or certification decision.
Official sources used for this page
Adelphos does not issue a lodged EPC, appoint an assessor through this page or guarantee a rating change.
What should you read next?
These links move to a different user task rather than repeating this page's primary query.
Frequently asked questions about new build EPC.
Is a SAP calculation the same as an EPC?
No. SAP is a dwelling energy-performance calculation methodology. An official EPC is produced and lodged through the applicable accredited process using approved software and verified project information.
Which SAP version applies to my project?
Check current government methodology notices and transitional provisions for the project jurisdiction and dates. Do not select a version from a generic web article alone.
Can Adelphos produce a SAP calculation?
The toolbox records a completed stateless SAP calculator and an authenticated SAP workflow. Project suitability, official approval and certificate lodgement still need the responsible professional process.
Does Adelphos issue an official EPC?
No. An official EPC must be produced and lodged through the applicable accredited-assessor process. Adelphos can calculate and compare supported scenarios, but its calculation output is not a lodged certificate.
The user is responsible for verifying every input, assumption, method, result and its suitability, and for obtaining competent-person review. Adelphos accepts no responsibility for decisions made using a calculation. Adelphos scenario output is not an official EPC or an equipment recommendation.
Model the EPC scenario with your assessment data.
Use Adelphos Chat for the authenticated calculator workflow, controlled inputs and branded scenario report.
Build a valid EPC in Adelphos Chat now