Assessors and Assessor Accrediting Organisations

NatHERS Accredited Assessors

NatHERS Accredited Assessors are professionally recognised energy assessors who are qualified in conducting house energy ratings using NatHERS Accredited Software. They follow an Assessor Code of Practice and are provided ongoing support and guidance to ensure they provide high standards of quality and service delivery.

It is recommended that owners and builders use a NatHERS Accredited Assessor when getting a home’s energy rating determined.


Upstairs Living Area

Looking for a NatHERS Accredited Assessor?

If you are a home owner or builder wanting to ensure your building is energy efficient, it is beneficial to engage a NatHERS Accredited Assessor at an early stage of the design process. To find a NatHERS Accredited Assessor, see our Owners and builders page.

Becoming a NatHERS Accredited Assessor

If you are considering becoming a NatHERS Accredited Assessor, there are many benefits including:

  • regular newsletters and updates on industry developments
  • on-going support and technical assistance, including NatHERS Software Technical Notes advice
  • Continuing Professional Development (CPD) support and training
  • feedback and quality assurance processes to assist you in achieving best practice energy ratings and
  • access to dispute resolution services

The NatHERS Administrator also offers free services to NatHERS Accredited Assessors, including:

  • training opportunities and events
  • advice on changes to NatHERS policies and operations and software, and
  • advice on jurisdictional application of NatHERS ratings in building regulations

Why should I become a NatHERS accredited assessor?

How do I become a NatHERS accredited assessor? 

To become a NatHERS Accredited Assessor, further information can be found on our Assessor accreditation and qualifications page.

Assessor Accrediting Organisations

Assessor Accrediting Organisations (AAOs) are professional organisations with responsibility for accrediting assessors and ensuring they deliver reliable and consistent energy ratings.

There are three AAOs currently operating in Australia:

ABSA logo
Design Matters
HERA logo
ABSA Design Matters National HERA

AAOs operate in accordance with the Protocol for Assessor Accrediting Organisations.

An updated AAO Protocol was released in March 2016 and will come into effect on 1 July 2016. (note: Clause 4.5 – Continuing Professional Development of the AAO protocol will only come into effect when assessors next renew their annual accreditation after 1 July 2016).

Read the updated AAO Protocol for Assessor Accrediting Organisations – March 2016 [PDF 429 KB]

Read the previous version AAO Protocol for Assessor Accrediting Organisations – March 2014 [PDF 411 KB]

Using NatHERS Software

It is important that house energy ratings are undertaken in a reliable and consistent manner. If you are a NatHERS Accredited Assessor and want further information on how to complete an energy rating using the NatHERS Accredited Software for regulatory purposes, including Technical Notes, see our NatHERS Software Technical Advisory Committee (TAC) page.

Using the NatHERS logo and NatHERS Universal Certificate

Only a NatHERS Accredited Assessor can issue NatHERS Universal Certificates. The NatHERS Universal Certificate includes the NatHERS rating, logo and stamp, which assessors can use as evidence of their competence to complete an energy rating when seeking building approval.

Only NatHERS Accredited Assessors may use the NatHERS logo in their promotional materials. The terms of use are prescribed in the Guidelines for using the NatHERS logo.

UC-Accredited front page
nathers logo