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About Basix



BASIX applies to all residential dwelling types and is part of the development application process in NSW. It is one of the strongest sustainable planning measures to be undertaken in Australia.

What is BASIX?

BASIX stands for the Building Sustainability Index. The BASIX requirements are one of the strongest sustainable planning measures in Australia. They aim to create more comfortable and cost-efficient living conditions.

In NSW, there are BASIX requirements for water and energy usage and thermal comfort performance that apply to:

  • all new residential dwellings.
  • alterations and additions to dwellings that cost $50,000 or more.
  • swimming pools of 40,000 litres or more.

BASIX chart

To approve such developments, the consent authority (usually your local council) requires evidence that the development plans meets the BASIX requirements.