The Building Sustainability Index (BASIX) requirements apply to all residential dwelling types and are part of the development application process in NSW. BASIX is one of the strongest sustainable planning measures to be undertaken in Australia.
In NSW, there are BASIX requirements for water and energy usage and thermal comfort performance that apply to:
- all new residential dwellings.
- alterations and additions to dwellings that cost $50,000 or more.
- swimming pools of 40,000 litres or more.
To approve such developments, the consent authority (usually your local council) requires evidence that the development plans meets the BASIX requirements.
An overview of the assessment process
To demonstrate your development meets the BASIX requirements, you must conduct an assessment using the online BASIX Tool, which estimates the water and energy consumption and the thermal comfort based on the information you provide. This information includes the floor area, the size, location and type of windows, the type of insulation and the type of hot water system being installed.
There are detailed help notes available on the BASIX website to guide you through the process.
Once you have successfully completed the assessment by meeting the BASIX targets, you must generate a BASIX certificate and submit it with your development application or complying development certificate. The BASIX certificate lists the key elements of the design, which are referred to as sustainability commitments.