If you are building a new home in NSW, you will need a BASIX Certificate to submit with your development application*
What is BASIX ?
BASIX (the Building Sustainability Index), is a new planning tool that affects anyone building a new home. By applying practical measures to the design of a new home, BASIX ensures there is the potential to save energy and water – saving you money on your bills and protecting the environment

How to get a BASIX Certificate
- Go to www.basix.nsw.gov.au and login to the BASIX assessment tool.
- Complete the assessment from by entering the design details of the home. The tool demonstrates how the proposed design is scoring, according to its potential to save energy and water.
- Once the design meets the targets, you can print your BASIX Certificate.
- Lodge your proposal at Council with the BASIX Certificate.
*Check the BASIX timeline to see when your Council area will be affected
BASIX means all NEW Homes will
- Save water
- Save energy
What does this mean for your House – New Home design?
BASIX is flexible tool that offers a range of design choices including using:
- Insulation
- Window glazing
- Eaves and window shading
- Wastewater for garden use
- Light coloured roof materials
- Gas or solar hot water systems
- Skylights to bring in natural light
- Landscaping that requires less water
- Rain water tanks for use in gardens, toilet and/or laundry and for toping up pools.
- Water-saving showerheads, taps and dual-flush toilets.
- Passive solar design to make your home warmer in winter and cooler in summer
The BASIX Timeline:
From 1 July 2005, BASIX applies throughout NSW, for:
- Houses
- Dual Occupancies
- Villas
- Townhouses
- Multi-unit apartment
From 1 October 2005, BASIX applies to alterations and additions made to existing homes, across NSW.
Key points about BASIX
- To get a BASIX Certificate, you must show that your proposed home will be designed and built to save energy and water.
- Information required by BASIX includes site location, dwelling size, floor area, landscaped area and services.
- The BASIX commitments shown on the Certificate must be clearly marked on the design plans.
- Council staff cannot accept a development application without a BASIX Certificate.
- The BASIX website has an on-line tutorial and other resources that will help you complete the assessment. You can ring the BASIX Help Line during business hours: 1300 650 908
- From 1 October 2005, BASIX applies to alterations and additions made to existing homes, across NSW.
Contact Details
Website: www.basix.nsw.gov.au
BASIX Help Line:
1300 650 908 during business hours.
email: basix@dipnr.nsw.gov.au
Address: Department of Infrastructure
Planning and Natural Resources
GPO Box 39
Sydney NSW 2001
