BASIX targets are calculated as a percentage of savings against NSW average benchmarks (being the average-per-person water consumption and greenhouse gas emissions levels across the state).

These percentage savings are then expressed as a target – BASIX 50 represents a 50% saving against the benchmark.

BASIX assesses a proposed dwelling based on these benchmarks, and taking into account regional variations such as soil type, climate, rainfall and evaporation rates. You can find more information on the BASIX website.