Climate change isn’t just an environmental issue — it’s reshaping Australia’s property and lending landscape. From rising insurance premiums to falling home values in high-risk areas, brokers and lenders are facing a new reality where climate risk now carries financial weight.
More than 3,000 homes were destroyed in the 2019–20 Black Summer Bushfires, while almost 2,000 were inundated in Lismore’s 2022 floods. But even those untouched by disaster are paying the price through soaring insurance costs, higher rebuild expenses, and reduced property valuations.
Flood risk alone has wiped an estimated $42 billion from property values nationwide, according to Climate Council and PropTrack analysis.
A new federal assessment warns that climate change could erase up to $571 billion from Australia’s property market by 2030, with losses projected to reach $770 billion by 2100 under a worst-case scenario.
The National Climate Risk Assessment (NCRA) identifies more than 1.5 million Australians living in high- or very-high-risk coastal areas by 2050, with rising seas, flooding, and extreme heat threatening even affluent suburbs.
“One thing that is very clear from this climate assessment is that our whole country has a lot at stake,” said Climate Change and Energy Minister Chris Bowen.
The report found that some of Sydney’s most expensive harbourside suburbs — including Double Bay, Millers Point, and Darling Point — face mounting exposure to sea level rise and storm surges. Nationally, sea levels could rise up to 50cm by 2050, compounding long-term housing and infrastructure risks.
The Climate Council estimates that 650,000 homes and businesses are already at high risk from one or more climate hazards such as floods or fires — roughly one in every 23 properties nationwide.
Homes in flood-prone areas are worth $42.2 billion less than they would be without this risk, with Queensland accounting for the largest share of losses. The state has one-third of all flood-exposed homes, costing owners $19 billion in foregone value, followed by New South Wales at $14 billion.
Lower-income areas are hit hardest, widening the economic divide.
“The largest drops in property value due to flood risk today are concentrated in lower-income areas, deepening inequality,” the Climate Council said.
The Insurance Council of Australia reports that extreme weather has tripled its economic toll over three decades, averaging $4.5 billion in annual claims throughout the 2020s.
In 2025 alone, three major climate events — the North Queensland floods, ex-Tropical Cyclone Alfred, and the NSW-Hunter floods — generated nearly $1.8 billion in claims, mostly tied to residential damage.
In some flood-prone zones, insurers have withdrawn coverage or raised premiums sharply, leaving households unprotected. One in five northern Australians now lacks home insurance altogether, compared to 11% nationally.
Without adequate coverage, borrowers risk losing mortgage eligibility — a growing issue in regions where major insurers have pulled out. Suncorp, for example, halted coverage in Roma, QLD, after the 2012 floods and only resumed once a local levy was constructed.
For mortgage brokers, the intersection of climate change, insurance, and lending risk is becoming impossible to ignore. Properties in high-risk zones may still find buyers, but their long-term serviceability and insurability are now under scrutiny.
Buyers might secure a discount on purchase price but face higher insurance costs, limited policy options, or lengthy repair bills after disasters. These costs can influence lender assessments, particularly for high-LVR loans or first-home buyers entering flood-prone regions under government-backed deposit schemes.
As the Climate Council notes, “Every Australian deserves to understand the climate risks that their home and neighbourhood are already facing.” Yet many still lack accessible, property-level information on their exposure.
Brokers and lenders can leverage emerging tools like:
As more homes face exposure to floods, fires, and extreme weather, the financial toll will rise.
For brokers, that means not just facilitating access to finance — but helping clients make informed, climate-smart homeownership decisions.
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