What is a BASIX assessment or NatHERS rating, and why is it required?

NatHERS is the national house energy rating scheme. According to NatHERS, states and territories use its ratings as the most common way to show a new home meets the National Construction Code energy efficiency requirements, and a NatHERS assessor uses accredited software, your plans and the local climate zone to produce the rating. BASIX is a NSW scheme that sets sustainability targets for water and energy and minimum thermal comfort for residential development, with a certificate produced using an online tool. Each state adopts the National Construction Code on its own timetable, so the requirement that applies to you depends on your state and your approval date.

In MyBuildHub: record the assessor, the rating or certificate number and the energy report in your project documents, and make sure the design you build matches it.

Check yourself: NatHERS, BASIX, ABCB state and territory adoption.

General information only. It is not legal advice and may not apply to your project. Rules differ by state and change over time, so confirm with your regulator, certifier or a lawyer before acting.