http://hub.planning.nsw.gov.au/ The NSW PlanningHub provides access to information to help you prepare, lodge and track development applications. Whether you’re getting started on a new build or renovation or want to lodge and track your development application the PlanningHub helps you on your journey and provides access to tools designed to make the process simpler. For further information and guidance on the planning system for NSW go to the Department of Planning & Environment's website. http://www.planning.nsw.gov.au/
The above links are for NSW. If anyone wants links for other states, then perhaps members who reside elsewhere can provide those.
