National Construction Intelligence Platform
Fair Work Award [MA000020] Calibrated
State Jurisdictional Framework: WA

Granny Flats & Secondary Dwellings in Western Australia

Statutory council planning controls, Fair Work CW3 benchmarks, and local government calculators for granny flats & secondary dwellings across Western Australia.

Benchmark Installed Rate
$2200 –$3800/m²
Statutory Reference: Planning and Development (Local Planning Schemes) Regulations 2015 & R-CodesWA planning regulations allow ancillary dwellings (granny flats) up to 70 sqm on residential lots of at least 350 sqm without a development application. A BA2 building permit is mandatory.

Select Your Council Area in WA

Select your Local Government Area to open the interactive calculator and local DA checklist.