The climbing cost of climate change for the Australian property market

Climate change is already affecting home values due to the impact of more severe weather events and rising home insurance premiums, and the cost of building is likely to rise as regulatory changes designed to enhance climate resilience alter building codes and zoning laws, according to a new report.

The National Housing Supply and Affordability Council describes climate change as an emerging trend that is raising the cost and complexity of supplying more housing. In its newly released State of the Housing System report, the council discusses how climate change is reducing the value of some homes when major weather events cause flooding or other natural disasters.

“The price differential between flood-affected and non-flood affected homes has been estimated to be up to 35 percent a year after a flooding event,” the report says. “Furthermore, the RBA estimates around 7.5 percent of properties are in areas that could experience price falls of at least 5 percent due to climate change by 2050.”

More than one million households are struggling to afford home insurance, and rates of non-insurance are increasing due to the cost. For example, the Australian Competition and Consumer Commission estimated that 40 percent of homes in Northern Western Australia were uninsured in 2020.

“Climate change is causing home insurance premiums to rise across Australia, adding to already elevated housing costs. Homeowners in areas considered at–risk of natural disasters are expected to see insurance premiums rise further or have difficulty obtaining insurance due to heightened risks.”

More frequent and severe weather events such as cyclones and bushfires, as well as coastal erosion and flooding from rising sea levels, present risks to housing safety. More than 3,000 homes were lost in the 2019-20 bushfire season, causing $2.3 billion in insurance losses. The report says the predicted direct cost of natural disasters to the economy and housing will be $35.2 billion per year by 2050.

Climate change and net-zero targets could raise the cost of building new homes, the report says. “Regulatory changes to enhance climate resilience will alter building codes and zoning regulations.

Developers facing higher compliance costs may have difficulties meeting updated standards, potentially delaying or reducing housing availability.”

However, the report says the increased cost of building a home with climate-resistant materials and eco-friendly features is more than offset by lower energy costs over a property’s lifetime. The current minimum energy efficiency requirements within the National Construction Code are estimated to deliver a household–level benefit-to-cost ratio of 1.37, according to the report.

Australia’s housing debate is often dominated by affordability and supply, but a new collaboration between Brickworks and acclaimed architecture firm Kennedy Nolan argues the conversation should also focus on the quality and longevity of the homes being built.

The project, titled Our Next Neighbourhood, examines how suburban housing could evolve in response to shrinking block sizes, rising energy costs, increasing density and changing family structures.

Rather than proposing luxury dream homes, the initiative focuses on what its creators describe as achievable suburban housing models that are more flexible, sustainable, and better suited to modern Australian life.

Brickworks commissioned Kennedy Nolan to investigate what suburban housing might look like if “design, long-term liveability and enduring materials were placed at the centre of the conversation”.

The result is two housing concepts, known as the Street Terrace and Canopy Terrace, which explore higher-density living while maintaining access to green space, natural light and privacy.

The designs incorporate adaptable floorplans that can evolve as family needs change, along with passive design principles intended to reduce reliance on mechanical heating and cooling.

Brett Ward, General Manager of Marketing at Brickworks, said the company wanted to broaden the discussion around housing beyond simply increasing supply.

“Much of the housing conversation today is understandably focused on supply and affordability, but there is an equally important discussion to be had about the quality and longevity of the homes we build,” he said.

“We wanted to explore how thoughtful design, combined with durable, resilient materials, could create homes that not only function well today, but continue to support Australian families and communities long into the future.”

Kennedy Nolan said the project was partly inspired by concerns that contemporary housing often struggles to adapt to changing household structures and environmental pressures.

The architects said innovation in suburban housing was “essential” to address changing family groupings, energy use, urban heat island effects and growing disconnection from place.

According to the design team, the concepts draw on lessons from some of Australia’s most influential housing projects while seeking to create neighbourhoods with stronger links to landscape, community and local identity.

Rachel Nolan, founder of Kennedy Nolan, said the practice saw an opportunity to reimagine suburban housing as something “more connected to our climate, our landscape, our communities and our Australian identity”.

The project comes as policymakers, developers and planners continue searching for ways to deliver more housing without sacrificing liveability, neighbourhood character or long-term sustainability.

The climbing cost of climate change for the Australian property market

The insurance premium gap between flood affected and non-flood affected homes is significant

Brickworks has enlisted acclaimed architecture studio Kennedy Nolan to explore how homes could become more adaptable, energy-efficient and connected to community.