Owner-Builders & Regulations
Do I need a builder's licence to build my own home?
If you engage an appropriately licensed or registered builder to take responsibility for the building work, you do not usually need a builder's licence yourself. Managing or carrying out the project as an owner-builder is a different arrangement. Check the authorisation and eligibility rules for your location before committing. An owner-builder authority does not authorise specialist work outside its scope, such as regulated electrical or plumbing work.
Official sources:
General information only. Requirements vary by state or territory and change over time, so check the current rules for your location.