Must comply with Schedule 1 of the General Regulation.
A retaining wall doesn't need BA if:
- it isn't higher than 1.2m when measured from any point at the top of retaining wall to lowest adjacent ground level
- it's up to 1.5m high when measured from any point at top of retaining wall to lowest adjacent ground level, and it:
- complies with the exempt building code
- complies with the building code and
- is built in a proper and skilful way.
- you don't need a licence, notice, certifier, plans, inspections, certificates, design or construction standards under the Building Act 2004. But if it's more than 1.2m high, design and construction standards will apply, and
- it follows all other general rules.
Also see: retaining wall DA exemptions.