THERE ARE A FEW THINGS TO CONSIDER
1) Is the land compliant with State Government Requirements for granny flat approval?
2) Which form of approval should be used Complying Development (approval through a Private Certifier) or DA (Development Application through local council)?
3) Additional Costs & Process (due to the nature of the land and or land conditions)
As you work through all the topics above, you will gain an understanding of all the aspects that affect granny flat approval and buildability.