BASIX Assessments



A BASIX (Building Sustainability Index) Assessment is a mandatory NSW Government sustainability tool required at the development application stage for all new residential builds, apartments, and major alterations over $50,000. We combine specialised NatHERS 7-star thermal modelling with comprehensive water and energy data entry to deliver cost-optimised, fully compliant BASIX certificates that keep your NSW project moving forward smoothly.

A BASIX Assessment demonstrates that your residential project satisfies the strict New South Wales sustainability targets from the outset. It’s about ensuring that your home is energy efficient to run, structurally comfortable to live in, and water-wise for the future.

The NSW Department of Planning utilises a dedicated online portal framework that sets mandatory compliance benchmarks across water, thermal comfort, and greenhouse gas energy reduction. 

Our experienced team will assist you with the preparation of a BASIX assessment for your project. We provide tailored recommendations for the building materials, glazing, insulation, and services that suit your development and satisfy your development application (DA) or Complying Development Certificate (CDC) conditions.

Send us your design plans for a no-obligation quote:

NatHERS Energy Rating

Section J Compliance DtS and J1V3

Residential Deemed to Satisfy

BASIX Assessments

Water Sensitive Urban Design (WSUD)

Waste Management

Environmentally Sustainable Design (ESD)

Performance Solutions