Australia’s mid-sized housing markets have accumulated massive growth buffers over five years of surging property prices, leaving homeowners in Perth, Brisbane, and Adelaide heavily insulated against a deepening national downturn while Melbourne stands exposed with almost no safety net.
New scenario modelling by property data analytics firm Cotality reveals that even severe, double-digit property price corrections across Australia’s mid-sized capitals would barely scratch the gains amassed during the recent five-year housing boom.
The analysis comes as Australia’s property downturn gathered sharp momentum in July, with the national Home Value Index falling 0.7 per cent – the steepest single-month decline since December 2022.
Both Sydney and Melbourne are already more than 5 per cent below their recent peak values, while Brisbane and Adelaide entered minor contractions over the past two months.
Cotality’s August Housing Chart Pack mapped potential downturn scenarios of 5, 10, 15, and 20 per cent across major capital cities to examine how deeper price falls would reshape local real estate markets.
Gerard Burg, Head of Research at Cotality, said that while price falls are increasingly widespread, the impact on home equity varies dramatically depending on location.
“There’s been plenty of discussion about how far housing values could fall, but the same percentage decline doesn’t have the same impact everywhere,” he said.
“Markets such as Perth, Brisbane and Adelaide recorded exceptional growth over the past five years, giving them a more significant buffer against declines than cities where values have been comparatively flat.”
A tale of two downturns
Melbourne faces the highest vulnerability among major capitals after half a decade of subdued price growth.
Having reached a peak median dwelling value of $840,000 in November 2025, Melbourne property values have virtually no cushion remaining, meaning a price drop exceeding 10 per cent would instantly erase five years of growth and return values to pre-pandemic levels.
By contrast, Perth holds the nation’s largest growth buffer.
Even if home values in the Western Australian capital crashed by 20 per cent, the median dwelling value would only slip back to around April 2025 levels following one of the strongest growth cycles in modern Australian history.
Brisbane and Adelaide tell a similar story of resilience; despite entering a downturn two months ago, Brisbane could sustain a full 20 per cent market correction and still maintain price levels seen in August 2024.
A matching 20 per cent drop in Adelaide would only reset its market to April 2024 levels, underscoring the extraordinary depth of its multi-year boom.
Meanwhile, Sydney housing values have already dropped more than 5 per cent from their peak, but a broader 20 per cent downturn would only retreat values to May 2021, illustrating the vast equity accumulated during the pandemic boom.
What is driving the market turn?
The shift in market momentum is being driven by compounding financial pressures on buyers.
According to Mr Burg, severe affordability hurdles and mortgage serviceability constraints first emerged in high-value markets before higher interest rates, ongoing cost-of-living pressures, subdued consumer confidence, and reduced investor activity following the Federal Budget began to weigh broadly across national demand.
Australia’s residential real estate market remains the nation’s dominant asset class, valued at $12.4 trillion across 11.5 million dwellings and representing 56.8 per cent of total household wealth.
However, key transaction indicators point to a clear loss of buyer urgency.
Capital city auction clearance rates dropped sharply from a peak of around 66 per cent in February down to the low 40 per cent range by late July.
Properties took a median of 35 days to sell in the three months to July, while the national median vendor discount widened to 3.8 per cent as sellers were forced to adjust expectations.
National transaction volumes dropped 0.8 per cent over the year to July, driven by a 3.5 per cent fall across combined capital cities, even as regional sales expanded by 4.2 per cent.
On the rental side, annual growth held firm at 5.9 per cent in July – continuing to outpace wage growth of 3.3 per cent – pushing national gross rental yields up to 3.7 per cent.
Mr Burg emphasised that the modelling is intended to contextualise market resilience rather than forecast an absolute price floor.
“Although housing values are falling across more cities, underlying supply and demand conditions remain quite different,” he said.
“Markets that experienced the strongest growth over recent years are entering this downturn from a much stronger position. Understanding where values would return to under different scenarios provides useful context for buyers, sellers and policymakers.”