Other way around - Perth median will be higher than Sydney in a couple of years. It's inevitable, there is just too much money in WA, not enough housing, fastest growing city (population), highest wages, etc etc.
Hi Kenneth.
The demographia survey does not rank any other cities outside of the 6 countries its lists.
Therefore, it does NOT rank Perth or Sydney as the 11th or 7th most unaffordable housing cities in the WORLD, it ranks them only within the 6 countries listed.