Will my house be safe from climate change? How to check your property's future risk in Australia

Will my house be safe from climate change? How to check your property's future risk in Australia

Will it flood, will it burn, will it cope with a cyclone: three separate questions, with one worry sitting underneath all of them. Will this house be safe in the future?

Most people answer that worry by checking today's risk on today's maps, but a mortgage runs for thirty years and a family home can hold you for fifty, and almost every map you'll reach for was drawn from what has already happened, in a climate we've already begun to leave behind. Since climate change is fundamentally about what happens next, this guide looks at how to check a property's future risk, where the free tools reach their limits, and what a changing climate is already doing to insurance.

Climate change isn't one threat, it's a stack of them

The first mistake is treating climate change as a single hazard. It arrives as a stack of separate ones, and each affects a house in a different way.

  • Extreme heat is the signature change: more hot days, longer heatwaves, and warmer nights that never let a house cool down. It's the one hazard that touches every postcode, coastal or inland.
  • Flooding, in both its forms: rivers bursting their banks, and flash flooding when heavier downpours overwhelm the drains. (See our guide to checking flood risk.)
  • Bushfire, as longer seasons and drier fuel turn bush once thought manageable into extreme fire risk. (See our guide to checking bushfire risk.)
  • Cyclones and severe storms, with cyclones creeping further south as the ocean warms and severe storms getting wetter and hailier. (See our guide to checking storm and cyclone risk.)
  • Coastal hazards, meaning sea-level rise, storm surge and erosion eating at low-lying land. Scientists project sea levels around Australia rising by roughly 0.4–1.1 m this century, depending on emissions.
  • Drought, the slow one. It dries the fuel that feeds fires, cracks the soil under foundations, and quietly raises the danger of nearly every other hazard on this list.

The part that matters most is that these hazards don't take turns; they compound. Australia's first National Climate Risk Assessment, the official federal stocktake, warns that we should expect more concurrent, cascading and compounding events, such as heavy flooding on the back of a tropical cyclone, or bushfire smoke layered over an extreme heatwave. A single bad week can deliver several hazards at once, each making the others worse, which means the combination is your real exposure, and no single free map shows the combination.

The one thing every climate map has in common

There's a thread running through all the standard tools: they look backward. A council flood map is drawn from past floods, a Bushfire Prone Area map is drawn around vegetation that has burned before, and a wind region under AS/NZS 1170.2 comes from the historical record of extreme winds. Each is genuinely useful, but each answers the same backward-looking question, namely whether this has happened here before, and that's the wrong tense for the question you're actually asking.

In September 2025, Australia's first National Climate Risk Assessment made this official. Its core finding, in plain terms, is that historical observations on their own are no longer a reliable guide to future risk, and that the country is likely to face hazards that are more intense, more frequent, and in places that have never seen them before. The maps most of us lean on are built almost entirely on the one thing the national assessment has just advised us to stop relying on.

How to check your climate risk for free

Everything below is free, and worth working through before paying for anything.

  1. Start with the three hazard maps. Your council flood map, your state Bushfire Prone Area map, and your AS/NZS 1170.2 wind region. They tell you what has already happened around your block, which is where any honest assessment begins, and our flood, bushfire and cyclone guides walk through each one.
  2. Climate Change in Australia (climatechangeinaustralia.gov.au). The CSIRO and Bureau of Meteorology projections portal, refreshed in 2025 with newer modelling. It won't zoom to your roof, but it shows the direction of travel for your region: hotter days, drier southern winters, more intense downpours.
  3. The Climate Risk Map from the Climate Council and Climate Valuation. Free, and searchable by suburb or postcode. It maps six hazards, including riverine and surface-water flooding, coastal inundation, bushfire, extreme wind and tropical cyclone wind, and shows how they climb under different emissions paths.
  4. Coastal Risk Australia (coastalrisk.com.au), if you're anywhere near the sea. It visualises sea-level rise and coastal inundation out to 2100 using the latest IPCC scenarios.
  5. Your state climate portal. AdaptNSW and the SEED hub in New South Wales, and the equivalents in other states, hold the most local coastal and hazard data, often the freshest you'll find for free.
  6. The property's own history. Ask the agent, and ask the neighbours. A house tells you where it's weak, if you ask the right people.

Whichever tool you're reading, check two things almost everyone skips: whether the climate baseline behind the data is built on the past or actually projects forward, and whether it describes an area or your building. A suburb sitting inside a risk zone tells you very little about your particular block, slope and roof.

Are these tools accurate? The problem with every climate map

The free tools have four limitations worth understanding, and they all point the same way.

  • They look backward. This is the fundamental one, covered above: a map drawn from history understates a future the science says will be more extreme.
  • They show an area, not an address. A polygon or a suburb shading can't capture your slope, your build year, the way your roof is tied down, or the direction the worst hazard would arrive from.
  • They take one hazard at a time. A flood map treats flood and a fire map treats fire, but the dangerous days stack the hazards together, and no free tool combines them into a single picture of your block.
  • They're a snapshot. A rating from a 2015 study reflects 2015 conditions, and a "low risk" stamp can quietly go stale while the paper it's printed on stays the same.

None of this makes the maps useless. A flood overlay, a BAL rating and a wind region are all real tools, but each answers a narrow, mostly historical question, and when you stack those narrow answers side by side, the gaps between them are exactly where the future risk lives.

How climate change affects your insurance

This is the through-line that turns an abstract worry into a number on a bill. Insurers don't wait for the building codes to catch up: they price on risk classification and their own address-level models, and those models move fast. As exposure climbs, three things tend to follow.

  • A re-rating can lift your premium even if nothing on your block has changed, because it's the classification that drives the price, and classifications shift whenever the underlying data does.
  • Cover can thin out, or disappear. Climate Valuation projects that more than 500,000 Australian homes could be at high risk of becoming effectively uninsurable by 2030, with cover either withdrawn or priced out of reach, and the hardest-hit areas are already mapped, with the Hunter region in New South Wales currently at the top of the list.
  • Rebuild-to-code can exceed your sum insured. If a damaged home has to be rebuilt to a tougher flood, fire or wind standard than it was first built to, that extra cost can land on the owner, the same trap that already catches under-insured households after bushfires and floods.

Because uninsurable homes are hard to finance and hard to sell, given that lenders usually require valid cover, the cost of a shifting climate often arrives long before any disaster does. It arrives in the renewal letter.

What you can do if your property faces a riskier future

Knowing is the first step, and a higher-risk future is far from a dead end. The right response depends on which hazards actually reach your home and how it's built, so it's worth having a building professional weigh your specific house, but the priorities fall into a few groups.

  • Find your real exposure, hazard by hazard. Not the suburb headline, but your block: which hazards actually reach you, from which direction, and which way they're trending. This is the step the free maps can't finish for you.
  • Fix the shared weak points first. Some upgrades pay off against several hazards at once. A well-sealed, well-built envelope resists embers, wind-driven rain and heat alike, and good site drainage helps in both floods and storms, so the same dollar can buy resilience on more than one front. In our experience, this is where limited budgets are best spent.
  • Lift the services. Power boards, hot water systems and air-conditioning raised off the floor survive a flood better and speed up recovery afterwards.
  • Plan for the compound event. The worst days bring more than one hazard, and both your preparation and your evacuation plan should assume the same.

No combination of measures guarantees a safe house in every possible future. What they can realistically deliver is less damage when something does arrive, a faster recovery afterwards, and a property that remains insurable throughout.

The takeaway

Use the free maps and tools, all of them, but know exactly what they are: backward-looking, area-level, single-hazard snapshots that mostly model a climate we've already left behind. They answer the question of what has happened here before reasonably well, and they barely touch the question you're actually asking, which is whether this house will be safe in the future, against everything the climate now throws at it, sometimes all at once.

That property-level, forward-looking question is what a dedicated resilience assessment exists to answer.

Frequently asked questions

How do I know if my house will be affected by climate change?

Start with the free tools: your council flood map, your state Bushfire Prone Area map and your wind region, then layer on forward-looking sources like the Climate Change in Australia projections, the Climate Council and Climate Valuation Climate Risk Map, and Coastal Risk Australia if you're near the sea. Just keep the caveat in mind that most of these describe an area rather than your building, and most are built on the past climate rather than the future one.

Are council and government climate maps reliable?

They're reliable for what they measure, which is mostly what has already happened. They form a patchwork, they usually work one hazard at a time, and many are years out of date, and Australia's own National Climate Risk Assessment now warns that history alone is not a good guide to future risk. They're a starting point rather than the answer.

Which climate hazard should I worry about most?

It depends entirely on your address. A coastal block worries about surge and erosion, a bush-fringe block worries about fire, and an inland town worries about flood and heat. The point of a property-level assessment is to identify which hazards genuinely reach your home, from which direction, and which ones are climbing fastest.

Can my home become uninsurable because of climate change?

Yes. Cover can be withdrawn, or grow so expensive that it's effectively out of reach, and Climate Valuation projects more than 500,000 Australian homes at high risk of this by 2030. It can also happen without your property ever being damaged, because insurers price on risk classification, and a re-rating alone can move your premium.

My area has never flooded or burned. Am I safe?

Not necessarily. "It hasn't happened here" is a statement about the past, and the past is precisely what the science says is becoming a weaker guide. Hazards are projected to reach places that have never experienced them, including parts of southern Australia now facing cyclone and severe-storm risk they were never built for.

Does a newer house mean I'm protected?

It helps, but it's no guarantee. A newer build was engineered to the code and climate baseline of the year it was approved, and both the code and the climate keep moving, so even a recent home can sit in a landscape that now routinely meets conditions its design never accounted for.

Thinking about a specific property? A resilience report from Green Building Consultants assesses flood, bushfire, cyclone, heat, climate and hazard exposure for your exact address, and what it means for you. You can find out more about our reports here or Order a report →

Sources & further reading

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