Thanks folks, some good tips gratefully received.  To Jon, the development is along the Whitsunday Coast, making it regional.  Interested in your additional comments/ views.

HutchThanks for your informative response. In my case the reality is that the only aspect that may be of value is the roof tiles, so I'll call for some quotes and take things from there.  As I secured the property at a significant discount to the current market I'm still counting myself lucky.