BASIX Certificates

Building Sustainability Index

BASIX, or Building Sustainability Index, is a NSW Government requirement for all new residential developments and alterations over $50,000.

A BASIX Certificate is required as part of the planning process for all development applications including;

  • New dwellings from houses through to multi-unit residence
  • Alterations and additions of $50,000 or more in value
  • Swimming pools and/or outdoor spas with a water capacity of 40,000 litres or more.

Buildings are assessed to ensure they produce less green house gas emissions and are more water and energy efficient against targets that are based on a benchmark average for NSW.

Preparing an assessment

In preparing a report, we’ll discuss your needs, then provide you with an initial assessment and a range of cost-effective recommendations for meeting requirements. Once you’re satisfied, you’ll receive a BASIX Certificate and, depending on the thermal modelling technique used, a NatHERS Certificate showing your home meets the thermal, energy and water targets. These documents will be required as part of your submissions to council.


Here’s how

1. Contact us

Contact us today with details of your job and your timeframes.

2. Receive a quote

We’ll be in touch with a quote and let you know if more information is required.

3. Your initial report

We’ll prepare the initial assessment and discuss the results and recommendations.

4. You're good to go

Once you’re comfortable, we’ll provide the certificates for your council submissions.