My source is Trading Economics, which I recon is the best website for Australian and International Economic Data, due to its superior presentation and easy navigable collation of international economic data.
Further negative growth in Australian House prices expected for 2019
In the past Australia has enjoyed 7% pa long term avg price growth. That's phenomenal growth for an asset class that in principle depreciates if it was not for land price growth and high demand due to migration driven population growth. But recent quarterly trends show an overdue correction in shape of a distinct down turn driven by tighter lending policies.
Residential Real Estate is not really an income producing enterprise, it is rather a human necessities based asset class (shelter). Cash flow positive returns where achievable thanks to tax relief and high demand. Value is driven by speculation, economic cycles, systemic fundamentals and confidence in this asset class. Source: https://tradingeconomics.com/australia/indicators
Have a look at the life graph below as well.
It will always show the the latest movements of the Australian Quarterly House Pricing Index over the last 15 years.