Rising sea levels, heavier rainfall, and more frequent extreme weather events are already reshaping Australia’s housing market, with flood risks wiping an estimated $42.2 billion (US$27.4 billion) from national property values.
New data reveals that one in six Australian homes—more than two million properties—are now considered flood-prone, negatively impacting their value.
According to the 2025 valuation report by PropTrack and the Climate Council, a “typical home at risk of flooding” is now valued $75,500 lower than one without flood exposure.
Across the country, 650,000 properties—homes and businesses—are at “high risk” from multiple climate hazards including floods, bushfires, and coastal erosion.
Queensland, NSW Hit Hardest
Queensland and New South Wales (NSW) homeowners are bearing the brunt of the losses, reflecting the concentration of flood-prone regions in both states.In Queensland’s high-end Mermaid Beach–Broadbeach corridor, flood-exposed homes have lost up to 48 percent of their value, even though only 16 percent of properties are in active flood zones.
In Sydney, affluent suburbs such as Bellevue Hill and Balmain have seen some of the largest dollar-value losses per property.
The report says the divergence between coastal prestige and climate vulnerability is now a defining feature of the housing market.
“Known flood zones are being repriced, and high-value suburbs are adjusting more sharply than before,” the report said.
The financial effects of flood risk are not uniform.
In some regions, lifestyle advantages like ocean views or beach proximity continue to outweigh flood concerns—particularly in Noosa, Cleveland, and Hope Island, where flood-prone properties still command a price premium.
A Supercharged Climate
The year 2024 was the second hottest on record, while ocean temperatures reached new highs.Warmer seas fuel extreme rainfall, as seen during Tropical Cyclone Alfred in March 2025, which brought record-breaking flooding to southeast Queensland.
The same month, western Queensland experienced inundation over an area “larger than many European countries,” followed by devastating floods across coastal NSW in May.
The Bureau of Meteorology reports that insured losses from these three weather events alone have already exceeded $1.8 billion.
Preparing for a New Reality
The federal government’s National Climate Risk Assessment released in September paints a stark future.It says that by 2050, as many as 1.5 million Australians could be living with the direct impacts of rising seas; by 2090, that number could exceed three million if global warming surpasses 3 degrees Celcius.
Even at 1.5C of warming, sea levels are projected to rise 14 centimetres, putting major coastal cities at risk of regular flooding and erosion.
At 3C—the trajectory the world is currently on—the threats include permanent inundation of low-lying suburbs and widespread loss of property value.
Climate Change and Energy Minister Chris Bowen said the findings underscore the urgency of stronger mitigation and adaptation policies.
“Australians are already living with the consequences of climate change today, but it’s clear every degree of warming we prevent now will help future generations avoid the worst impacts in years to come,” he said.
Meanwhile, the property report warns that without a climate-informed property market—supported by transparent risk data and coordinated adaptation policies—the housing sector faces growing instability.
“We must transition from disaster response to resilience,” the report said.
“The costs of inaction will not just be measured in damage and displacement but in long-term financial erosion across vulnerable communities.”
