The Building Sustainability Index (BASIX) aims to deliver equitable, effective water and greenhouse gas reductions across NSW.

BASIX and the Planning System

An integrated part of the planning system, BASIX is implemented under the Environmental Planning and Assessment Act. BASIX applies to all residential dwelling types and is part of the development application process in NSW.

BASIX Assessment

BASIX is assessed online using the BASIX assessment tool. The tool checks elements of a proposed design against sustainability targets.


BASIX reduces water and energy consumption in homes across NSW. These environmental outcomes also provide a long term financial saving for the homeowner – and a valuable contribution to the sustainable future of our communities.

For further information relating to how insulation can contribute to achieving sustainability targets specified in BASIX, contact Fletcher Insulation’s Technical Services Team on 1300 654 444.

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