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.

The current Protocol for Assessor Accrediting Organisations was released in October 2021.

Protocol for Assessor Accrediting Organisations – October 2021 [PDF 952 KB] - current

Protocol for Assessor Accrediting Organisations – March 2016 (July 2020 update) [PDF 718 KB] - superseded

Protocol for Assessor Accrediting Organisations – March 2016 [PDF 429 KB] - superseded

Protocol for Assessor Accrediting Organisations – March 2014 [PDF 411 KB] - superseded

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, see our NatHERS Technical Note.

Using the NatHERS logo and NatHERS Certificate

Only a NatHERS Accredited Assessor can issue NatHERS Certificates. The NatHERS 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, in accordance with the terms and conditions outlined in the NatHERS Trade Mark Guidelines.

The NatHERS Trade Mark Guidelines outline conditions of use, eligibility, and approval processes for use of the NatHERS Trade Marks. The NatHERS name, acronym, logo and rating image are registered trade marks under the Australian Trade Mark Register. See the Guidelines document for more information. 


Example NatHERS Certificate
nathers logo