Weather events regularly cause catastrophic damage to property across Australia.
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Yet, for decades, Australia has treated natural disasters as temporary shocks to the housing market.
The long-held assumption has been that values and market confidence will recover once repairs are initiated and insurance claims are lodged. And at one point, it may have been consistently true.
But as floods, cyclones, and bushfires become increasingly frequent, this assumption is becoming harder to defend.
Australia is again seeing climate volatility move from forecast to financial reality. Over the past six months alone, severe weather has impacted communities, from cyclone activity in the north to tropical low-driven flooding across parts of Victoria, South Australia and New South Wales. This recent run of events points to a more complex risk environment for property owners, insurers and lenders alike.
The ever increasing frequency of these events is placing greater economic pressure on Australian housing in a way increasingly being priced into the market.
This trend is set to strengthen in the years to come and is creating a problem that banks, insurers and policymakers can no longer treat as a disclosure exercise alone.
The Insurance Council of Australia’s latest data shows extreme weather events generated $4.8 billion in insured losses in 2025 alone.
A single flood was once seen as bad luck. But when communities experience multiple events within a few years, repeated flooding becomes a risk that lenders and insurers must price and are now increasingly baking into valuations in areas that are regularly affected by natural disasters. The Hawkesbury-Nepean Valley illustrates this shift, recording six floods since 2020, including two in 2022, leaving little time for markets to reset their assessment of risk.
Alongside impacts on value recovery, extreme events are also impacting the starting point in affected markets. A recent Climate Council report found that flood risk has wiped out $42.2 billion worth of Australian property values compared to homes without flood risk.
The same report found homeowners are effectively paying a “disaster penalty” of about $75,000 for a typical three-bedroom, two-bathroom house, with at least 70 per cent of Australia’s over 2 million flood-prone homes valued lower today because of that risk. In Lismore alone, the value gap now stands at 8 per cent, worth $112,000 per home on average. This is a concrete illustration of how a single town can carry a lasting discount long after the floodwaters recede.
But it’s not just individual property owners being impacted.
Whole communities carry the cost
Property values reflect confidence in the whole local economy, not only the condition of one property.
After repeat flooding causes a lack of confidence in local real estate, local businesses are often forced to close their doors due to higher operating risk and a depressed local economy.
This means jobs disappear, investment slows, and suburbs become less attractive to future buyers. Households also become more cautious, insurers reassess exposure, and lenders look harder at long term value.
It’s a vicious cycle with very few winners. And all of those pressures can make a suburb less attractive to future buyers, even after the visible damage has been repaired.
To add insult to injury, the risk also falls unevenly.
Wealthier buyers may still compete for desirable coastal homes because lifestyle demand remains strong. But lower income households and first home buyers are more likely to be pushed toward cheaper homes in higher risk areas.
This turns climate risk into an equity issue, with the families holding the least capacity to absorb higher premiums, repair costs, or resale risk ending up carrying the greatest exposure.
Cotality’s own analysis of the 2022 east coast floods puts numbers behind this divide. Flood-affected coastal suburbs in Southeast Queensland, including Hope Island, Paradise Point, Burleigh Waters, and Broadbeach Waters, have rebounded within 18 months on average and now sit 31 per cent above their pre-flood values, with one suburb recovering in as little as eight months to reach 32 per cent above its pre-flood value. Over the same period, flood affected properties in inland Northern Rivers towns, including Lismore, Casino, Kyogle, Ballina, and Mullumbimby, remain as a group over 5 per cent below their January 2022 values, four years after the disaster.
This is a national challenge that will likely intensify as climate events become more frequent, widening disparities between coastal and regional communities. Whether repeated, more severe disasters eventually erode recovery even in premium coastal markets remains an open question.
So, what can we actually do about this wicked problem?
Climate risk must carry the same weight as borrower risk
Finding a solution cannot be left to homeowners alone. When climate risk starts affecting lending, insurance, local investment, and resale value, it becomes a whole-of-market issue.
Australia’s mandatory climate reporting regime has also accelerated that shift.
Since 1 January 2025, many large businesses and financial institutions have been required to prepare annual sustainability reports containing climate related financial disclosures, which means banks and insurers can no longer credibly argue that the risk is unknown.
The answer cannot be a sudden withdrawal of lending from exposed communities, because that would punish households already (in many cases, inadvertently) carrying the risk. It would also have potentially catastrophic consequences for the wider market.
Instead, Australia needs a measured transition that brings climate and natural hazard data into decisions before the market reaches a cliff edge.
For lenders, this means moving beyond broad portfolio reporting and building property level signals into mortgage origination and valuation decisions. Hazard frequency, insurance availability, and local economic resilience all affect the long term value of the asset and ultimately need to be assessed with care.
That work requires more than a climate overlay on a spreadsheet, but rather the application of the same discipline as borrower income and loan serviceability.
Banks need to understand where values are genuinely at risk, test how different data points affect credit decisions, and introduce change in a way that does not unnecessarily shock local markets or push borrowers out of viable homes.
Insurers need to identify where risk is becoming uninsurable and where mitigation can keep cover affordable. In the most exposed flood zones, some are withdrawing cover altogether, removing a key signal that lenders and buyers rely on to assess long-term property value. As homes become harder or more expensive to insure, they also become harder to buy, sell, and finance.
And governments must support communities before the next disaster arrives. Large scale mitigation infrastructure must be coupled with practical incentives that help households retrofit homes, improve resilience, and reduce future losses.
New Zealand offers one practical model already in the market. Westpac NZ offers eligible home loan customers five year interest free lending of up to $50,000 to fund flood resilience works, from improved drainage to raising a home above flood level. Rather than compensating households after the damage is done, schemes like this reward resilience before disaster strikes, a shift Australian lenders and policymakers should watch closely.
Success depends on coordinated, phased action and shared evidence across lenders, insurers, valuers, and governments to avoid conflicting signals, coordination failures, and market disruption.
Because the lesson from recent floods, fires, and cyclones is that the economic assumptions built around automatic recovery are starting to fail.
Climate risk must become part of the valuation process before it becomes part of the damage bill.
