Section J, Volume 1 and Part 3.12, Volume 2 of the National Construction Code (NCC) contain building regulations applicable to building energy efficiency. For NSW, parts of these building regulations pertaining to the energy efficiency of residential buildings are varied and BASIX applies.

For full explanatory notes on the application of building code energy efficiency requirements in NSW, the relevant NSW variations and appendices to the NCC should be consulted. In brief, residential buildings classified by the NCC as class 1, class 2 and parts of class 4 buildings are subject to BASIX, noting that certain technical provisions of the BCA are preserved and, in conjunction with the commitments on a BASIX Certificate, must be complied with.

Information on classification of buildings is available in the relevant part of Volume 1 of the NCC.