Relevant rules in the Regulation:
- Schedule 1, Part 1.4, Division 1.4.2, Section 1.47.
Letterboxes and barbecues are class 10b structures. A letterbox or barbecue doesn't need DA approval if:
- the plan area isn't more than 2m²
- the structure isn't wider than 2m
- the structure isn't more than 1.85m above datum ground level
- the finished floor level isn't more than 0.4m above datum ground level (if it has a floor)
- no part of it is between a front boundary and a building line for the block (if it isn’t a single letterbox)
- it's no more than 0.4m above datum ground level for any part within 1.5m of a side boundary or rear boundary of the block, and
- it meets the relevant general exemption criteria.
Extra criteria apply if you're building two exempt class 10 structures within 1.5m of a side or rear block boundary.
Also see:
- second building clearance area exemptions
- letterbox and barbecue BA exemptions.