Area of Shire Suburbs

After having a bit of a search, the easiest place to look is on the Shire Statistics site, via council's website.
Once you've opened the Sutherland Shire Community Profile website, use Area Selection (top left) to choose your suburb.
You are then presented with an Introduction & Summary page of your suburb of choice, complete with map highlighting the area covered by that suburb.
At the bottom of the map the area is given in Hectares and the Density ie. people per hectare.
Hope this saves someone some time and angst.