What counts as livable square footage in a home?

Answer:
Some flats in Australia are 45 square metres, but 50 metres is the minimum size that a bank will put a mortgage on. I would estimate that 150 metres square would be adequate for a young family with two adults and two children. It is fashionable to have more space.
First answer by ID3417121735. Last edit by ID3417121735. Question popularity: 4 [recommend question].