BASIX targets are the minimum performance outcomes a residential project must satisfy for water use, operational energy and thermal performance in New South Wales.

The term “target” is widely used by project teams, although NSW planning requirements formally refer to BASIX standards. The BASIX Tool compares the proposed development against the applicable standards and produces separate water and energy scores, together with heating and cooling performance results.

There is no single statewide BASIX score that applies to every project. The required outcomes vary according to factors such as location, dwelling type and development configuration. Each applicable assessment area must satisfy its own requirement before the BASIX Certificate can be generated.

Obtaining a BASIX Certificate involves more than entering basic project information into an online form. The assessment must be based on the proposed residential design, satisfy the applicable water, energy and thermal-performance requirements, and produce commitments that align with the plans submitted for approval.

The process begins by confirming the correct project type and assessment pathway. Plans and specifications are then reviewed, project information is entered into the BASIX Tool, results are calculated and any performance shortfalls are resolved.

Once the assessment is complete, the commitments must be checked against the current drawing set before the Certificate is generated and lodged. Those commitments then remain relevant during documentation, construction and final certification.

Can You Start a BASIX Assessment Before the Plans Are Finalised?

Yes. A BASIX assessment can begin before every drawing, specification and product selection is finalised. In many cases, starting before the approval set is completely locked provides useful time to identify thermal-performance issues, clarify missing information and coordinate practical design responses.

However, there is an important distinction between beginning a preliminary BASIX review and issuing the final BASIX Certificate. An early review can work with developing information. The final Certificate must be based on a sufficiently resolved design and must correspond with the plans and specifications being submitted for approval.

There is no universal rule that plans must be a particular percentage complete. Readiness depends on whether the available documents describe the building geometry, glazing, construction and relevant systems accurately enough for the assessment stage being undertaken.