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Development and Assessment


If you're building a new home, undertaking renovations of $50,000 or more, or installing a pool or spa of more than 40,000 litres, you will need a BASIX certificate.

The BASIX standards cover water, energy use and thermal performance. They apply to all new residential developments, as well as renovations more than $50,000.

You can access the BASIX tool with an existing applicant or developer NSW Planning Portal account. If you don’t have one of these accounts, you can register for one.

Access the BASIX tool via the Planning Portal

Increases to the BASIX standards came into effect on 1 October 2023. If you generated a BASIX certificate before 1 October, you do not need a new certificate. You must submit this with your development application, or lodge it with your complying development certificate application, within the 3-month validity period.

Increase to BASIX standards

The NSW Government has committed to achieving net zero emissions by 2050.

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How BASIX standards apply

Information about creating and revising certificates and limited transitional arrangements in place.

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BASIX support materials

Learn more to get you started in creating or revising a BASIX Certificate, or to troubleshoot.

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The energy section of the BASIX assessment examines the energy efficiency of the appliances and equipment, and the use of alternative energy sources in the development.

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The water section of the BASIX assessment examines the water efficiency of the appliances and fixtures, the design of the landscaping and the use of alternative water sources in the development.

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Thermal performance

The thermal performance section of the BASIX assessment examines the design and materials used in the building to reduce the need for artificial cooling and heating to keep the home comfortable.

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Examples of excellence in residential building

Inspiring case studies for sustainable living.

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Learn all about BASIX, how it applies to your development and how it is helping our environment.

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BASIX news and announcements

3 October 2023

The enhanced BASIX tool is here

The enhanced BASIX tool is now live! All users can now access the tool via the NSW Planning Portal.

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5 May 2023

BASIX tool enhancements mid-2023

The BASIX tool is being enhanced and is moving to the NSW Planning Portal in mid-2023.

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18 February 2022

Minor updates to the BASIX Tool

We have made a number of changes to BASIX.

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