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When You Don’t Need a BASIX Certificate in NSW

By Jamie Bonnefin on Sep 23, 2025 4:28:50 PM

Discover the key scenarios where construction projects in NSW are exempt from BASIX certificate requirements and streamline your project planning.

BASIX Law: Which Projects Must Have a Certificate & Which May Be Exempt

The Building Sustainability Index (BASIX) is a regulatory framework in New South Wales aimed at ensuring buildings meet certain sustainability standards. However, not all projects require a BASIX certificate. Generally, new residential buildings, alterations and additions exceed certain cost thresholds are mandated to obtain this certification.

Projects that may be exempt include certain types of minor alterations, temporary structures, and some heritage buildings. Understanding these exemptions is crucial to avoid unnecessary paperwork and compliance costs.

Cost Thresholds, Project Type & Size: Does It Trigger BASIX?

The cost thresholds for triggering BASIX requirements vary depending on the type and scale of the project. For example, renovations and additions with a construction cost below $50,000 are typically exempt. New builds regardless of cost, usually need a BASIX certificate.

It's essential to accurately estimate your project's costs and scope to determine if BASIX applies. Consulting with a compliance expert can help you navigate these thresholds effectively.

Heritage Buildings, Minor Alterations & Temporary Structures: Special Cases

Heritage buildings often have special considerations and may be exempt from BASIX requirements to preserve their historical significance. Minor alterations that do not significantly impact the building's overall sustainability can also be exempt.

Temporary structures, such as site offices or short-term installations, generally do not require BASIX certification. However, it is advisable to confirm these exemptions with local authorities to ensure compliance.

Alternatives or Adjustments: What To Do If Your Project Doesn’t Comply

If your project does not comply with BASIX requirements, there are alternatives and adjustments that can be made. These might include redesigning certain elements to meet sustainability standards or incorporating additional sustainable technologies.

Working with a sustainability consultant can provide you with tailored solutions to achieve compliance without compromising your project's feasibility or budget.

Risk of Non-Compliance: What Happens If You Skip BASIX

Non-compliance with BASIX can lead to significant risks, including legal penalties, project delays, and increased costs. Failing to obtain the necessary certification can halt your project and lead to fines.

Ensuring compliance from the outset is crucial. Engaging with experts in environmental sustainability design can help you navigate requirements and avoid the pitfalls of non-compliance.

Jamie Bonnefin

Written by Jamie Bonnefin

Jamie is the Director of Australia's leading ESD consultancy, Certified Energy. Jamie is a Green Star sustainability leader, NABERS assessor and accredited ABSA and BDAV Assessor. With over 15 years of experience in Sustainable Design in the built environment industry, Jamie is passionate about his work.