@Mattybman: The Deposited Plan (DP), which is the official document, will indicate this. This varies depending on the road category and the footway but definitely not from the kerb. Call Blacktown Council on 98396000 and ask to be connected to Planning and Development but you have to provide the DP reference, which you can get from the Stockland Elara Sales Team. Alternatively, the Stockland Elara Sales Team should be able to tell you.
You can also go over Part C of the Blacktown Development Control Plan (2006): http://www.blacktown.nsw.gov.au/Plannin ... _Plan_2006