1. Building and Demolition

WA Building Energy has a very useful guide: Typical approval sequence

All applications need a certificate (CDC) from a registered building surveyor.

A Class 1 dwelling, or Class 10 building work (shed, carport, patio, pool etc), can be either a BA1 certified application, or a BA2 uncertified application.

A BA2 application - the CDC is provided by the Shire building services. 

All Class 2-9 building applications must be a certified (BA1 application form) and must be certified by a registered building surveyor contractor, prior to submitting a BA1 Certified Application.