Based on the August figures, however, Roost said the median income for the typical buyer was not high enough to buy a median priced house, even with a 20 per cent deposit.
"This measure shows the typical buyer's income is just too low by itself to afford the mortgage payments on the median-priced home," Roost said.
Affordability worsened across the country as average house prices rose to $370,000 in August from $361,000 in July. Single, after-tax income needed to service an 80 per cent mortgage on a median house was 53.5 per cent in August.
Home purchase becomes affordable for first home buyers if both adults are working. That assumes one person working fulltime, one part-time and they are also receiving working for families benefits.
Roost said it took 11.2 per cent of the median take-home pay of typical first-home buyer to service a mortgage for a house in the lower price range - a minor lift from July.