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.