Articles - Certified Energy

Common Mistakes That Delay BASIX Compliance

Written by Jamie Bonnefin | Jul 27, 2025 11:13:31 PM

Navigating the complexities of BASIX compliance is crucial for successful construction projects in New South Wales. Avoiding common pitfalls can save you time, money, and frustration.

Why BASIX compliance matters for your construction timeline

BASIX (Building Sustainability Index) compliance is a mandatory requirement for residential developments in New South Wales. It ensures that new homes meet specific sustainability targets, including water efficiency, thermal comfort and energy usage. Achieving BASIX compliance not only supports environmental sustainability but also has significant implications for your construction timeline.

Delays in BASIX compliance can halt your project, leading to increased costs and extended deadlines. By understanding the importance of BASIX and preparing accordingly, homeowners, builders and architects can avoid costly setbacks and ensure a smoother construction process.

Mistake #1: Incomplete or inaccurate architectural plans

One of the most common reasons for BASIX compliance delays is the submission of incomplete or inaccurate architectural plans. These plans are the foundation of the BASIX assessment and any discrepancies can lead to rejections or requests for additional information.

To avoid this mistake, ensure that all architectural plans are detailed and accurate. Double-check measurements, material specifications, and design elements. Collaborate closely with your architect to ensure that the plans meet all BASIX requirements before submission.

Mistake #2: Underestimating thermal modelling requirements

Thermal modelling is a critical component of BASIX compliance, as it evaluates the thermal performance of your building. Many applicants underestimate the complexity of these requirements, leading to non-compliance and project delays.

Engage a qualified professional to conduct thorough thermal modelling of your project. Ensure that the design incorporates adequate insulation, appropriate glazing, and effective shading solutions. By properly addressing thermal performance, you can meet BASIX targets and avoid compliance issues.

Mistake #3: Failing to meet solar access or overshadowing rules

Solar access and overshadowing are vital considerations in the BASIX assessment. Projects that fail to meet these rules can face significant delays or rejections. Proper solar access ensures that living spaces receive sufficient natural light, while overshadowing regulations prevent excessive shading of neighbouring properties.

Carefully analyse the orientation and placement of your building to maximise solar access. Use modelling tools to predict and mitigate any potential overshadowing impacts. Adhering to these guidelines will help you achieve BASIX compliance and avoid unnecessary delays.

How to avoid BASIX compliance rejections with Certified Energy

Certified Energy offers expert guidance to help you navigate the BASIX compliance process efficiently. Our team of experienced professionals can assist with detailed architectural reviews, precise thermal modelling, and comprehensive solar access assessments.

By partnering with Certified Energy, you gain access to industry-leading expertise and resources. We work closely with you to ensure that your project meets all BASIX requirements, minimising the risk of delays or rejections. Contact us today to streamline your BASIX compliance and keep your construction timeline on track.