.....there are number of possible indicators of the present gap of supply and demand. in estimating the gap the "national council for housing" has selected:
1) number of homeless housholds sleeping rough 2) number of homeless housholds sharing accomodation with friend or relatives 3)number of marginal residents in caravan parks AND
4)the difference between present rental vacanct rent and that recquired to clear the normal volume of new letting transactions (which btw. is 3%)...........................
that means, they have come up to a number of "shortage of 85 000 dwellings" in Australia by counting homeless AND by calculating how many dwellings do we have to build in Australia in order to ACHIEVE 3% VACANCY FOR RENTING, which is considered confortable buffer in the industry !