These links may assist you in considering the viability of your property development:
Google Maps
Very useful program for looking for property boundaries, measuring distances, and seeing a view from the street. Although not frequently updated it provides an excellent first port of call when considering a property. Any measurements taken should be used as a guide only. There is no substitute for walking the block and taking accurate measurements.
Sold Price
A really nice site. Enter the address to see what it last sold for as well as sales in the areas. Data for all properties is not always available.
On the House
Similar to "Sold Price" but with less information and we have found the land areas given are not always accurate. However, it will make a "guess" as to the value of the property using statistical data.
Property Data
Useful statistical data on a suburb or area.
Domain.com.au Report
Useful statistical data on a suburb or area.
Residex
Free Suburb Report.
State Revenue Office
Councils
Dept of Sustainability and Environment
Property & titles guides including legislation links