Building Sustainability Index (BASIX) certificates

All new detached and single attached houses are required to reduce water and energy consumption under the Building Sustainability Index scheme (BASIX).

A BASIX Certificate is only required where the works require a development application (DA). 

It may also be needed for the following alterations and additions to existing dwellings:

  • extensions or modifications to living areas or wet areas
  • modification to the fabric of a building
  • new pools and outdoor spas
  • new hot water systems and air conditioner (AC) units.

The BASIX requirements do not apply to:

  • new garages/carports
  • new outdoor/open structures
  • pergolas/verandahs/awnings where they are the only thing being constructed.

To learn more visit the NSW Government website.