What is a soil test and geotechnical report, and why is it mandatory?

A geotechnical engineer or accredited testing company takes soil samples and issues a report that gives a site classification. For residential slabs and footings this is usually based on Australian Standard AS 2870. The engineer designs the footings from it and the certifier will normally ask for it, which is why it is treated as required in practice. Whether a report is strictly required for your project is decided by your certifier and your state's rules, so confirm before you skip it. Do it before the structural design is finalised, because the result can change the footing design and cost.

In MyBuildHub: save the report in your project documents, add it as a Task before structural design starts, and note the site classification in your project notes so every consultant works from the same information.

Check yourself: your certifier and your structural engineer.

General information only. It is not legal, financial or professional advice and may not apply to your project. Confirm requirements with your regulator, your certifier or a lawyer before acting.