Introduced as part of the NSW planning system, BASIX (the Building Sustainability Index), is a web-based planning tool that measures the potential performance of new residential dwellings against sustainability indices.

BASIX ensures each dwelling design meets the NSW Government's targets of:

The greenhouse target will increase to 40% from July 2006.

Each development application for a residential dwelling must be submitted with a BASIX Certificate. A Certificate is issued once a BASIX assessment has been satisfactorily completed, using the on-line tool.

The building applicant, (e.g. architect, builder, owner builder) is responsible for completing the assessment, ensuring the BASIX commitments are clearly marked on the plans, and submitting the BASIX Certificate with the development application.

The sustainability indices are:

BASIX is a NSW Government planning requirement that means every new house, townhouse, villa or unit block built in NSW must be designed to use less energy and water.

BASIX operates entirely on-line at:

BASIX sets targets on the NSW average:

To get a BASIX Certificate, the building designer enters the house design data into the BASIX assessment tool, which then calculates whether the design meets the reduction targets. Once the design complies, a Certificate can be printed.

Every year, on average, each person in NSW uses:

Over 10 years, BASIX will save:


Currently, DIPNR is monitoring a sample of BASIX compliant home designs across Sydney that are now in the development approval and construction process. Of note:

* BASIX only applies to residential dwellings