Assessor guidance documents
Your reference for consistent assessments
The Technical Note outlines a standardised approach to rating a dwelling. Following the Technical Notes ensures that Home Energy Rating assessments are consistent and can be audited for assurance purposes.
Guidance notes are designed for everyday use, helping both new and experienced assessors carry out their work with confidence. They provide additional guidance to support the Technical Notes.
The Assessor Handbook is for new homes assessments and is equivalent to the Guidance note for existing homes assessments.
New Homes
Technical Note - New homes
The Home Energy Rating (NatHERS) for new homes Technical Note details the requirements that must be followed for a NatHERS assessment in regulation mode when demonstrating compliance with the National Construction Code.
Assessor Handbook - New homes
The Home Energy Rating (NatHERS) for new homes assessor handbook is designed to help assessors navigate the assessment process by describing how assessments are to be conducted, including the mandatory and recommended steps of the process.
Existing Homes
Technical Note - Existing homes
NatHERS for existing homes Technical Note sets out the requirements that must be followed when conducting a NatHERS for Existing Homes assessment.
Guidance Note - Existing homes
NatHERS for existing homes Guidance Note supports assessors to navigate the assessment process, outlines mandatory and recommended steps, offering general guidance to assessors undertaking an existing homes assessment.
