BASIX Alterations and Additions

BASIX Alterations and Additions

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BASIX Certificate for Alterations & Additions

On the 1st October 2006, all new Development Applications in New South Wales for Alterations & Additions with a value of $100,000 or more had required a BASIX Certificate.

Then on 1st July 2007, the New South Wales Government lowered the threshold to $50,000.

This ensures that practical measures (e.g. insulation, glazing, shading, hot water systems and any relevant water and lighting fixtures) are included when renovation work is planned. The aim is to further reduce greenhouse gas emissions and potable water consumption, as well as improve the thermal comfort of existing homes.

The BASIX requirements for Alterations & Additions set minimum efficiency standards for lighting and water fixtures and it may not be necessary to install a rainwater tank. However, if your work includes a Swimming Pool or outdoor spa, then a water tank will be required.

At the BASIX Certificate Centre, we can provide you with the BASIX Certificate for your Alterations & Additions from $135.00 (including GST), and for peace of mind to owners, designers and architects, our price will include consultation regarding the commitments our assessor has selected, with the possibility of alternatives if required.

NB: As of the 1st October 2023 the NSW Department of Planning will charge  fees for generating a BASIX Certificate, and this will be added to our price, being $33.00 including GST.


Find out more about BASIX Alterations and Additions by giving us a call on 02 9029 2052 or sending us an email to