Australia’s Infrastructure Crisis: What 40 Million People Means for Property and Housing

Australia just crossed 28 million people. By 2065, that number will hit 40 to 41 million. Sydney will be the size of New York. Melbourne will be bigger than London. And the infrastructure decisions made in the next decade will determine whether that growth creates opportunity or chaos.

Mark Bouris sat down with Adam Copp, Chief Executive Officer of Infrastructure Australia, the federal government’s independent advisor on infrastructure investment, planning and reform, to talk through what this means for how we build, where we live, and what happens to property values along the way.

Who is Adam Copp?

Adam Copp leads Infrastructure Australia, the body that advises the Australian government on which major infrastructure projects deserve federal funding. Any project seeking more than $250 million in Commonwealth funding must pass through Infrastructure Australia for independent assessment. Copp and his team assess business cases, prioritise projects on a national infrastructure list, and give Government the independent advice it needs to make decisions that will shape the country for generations.

The scale of what is coming

The numbers Copp puts on the table are significant. Sydney at 8.5 million people. Melbourne at 9.1 million. Cities that will rival New York and London in population, but sitting on infrastructure foundations that were largely designed for cities a fraction of that size.

“We need to build the infrastructure,” Copp told Bouris. “You can’t just keep getting in your car. You need to move around cities of this scale in quite a different way.”

Infrastructure Australia’s latest infrastructure priority list identifies mass transit as the single biggest challenge facing growing Australian cities, with more projects under that theme than any other category. The metros already delivered in Sydney, Melbourne, Brisbane and Perth are a start. They are not the finish.

Copp flagged specific gaps in Sydney alone: connecting Tallawong in the northwest to St Marys near Western Sydney Airport, extending from Bradfield south into new growth corridors, and eventually linking the entire network. Each of these projects takes a decade or more from planning to delivery. The time to start is now.

Why housing and infrastructure have to move together

One of the sharpest insights from the conversation was the relationship between mass transit investment and housing supply, and why the two are so often out of sync.

Infrastructure Australia recently completed a post-completion review of seven mass transit projects around the country, examining whether the housing outcomes promised at the planning stage were actually delivered. Copp was direct about the findings: “It is pretty patchy.”

The problem, as he explained it, is that governments are structured by portfolio. The minister for transport delivers the train line. The minister for housing delivers homes. Nobody is sitting across both at the same time, making sure the zoning happens, the private sector is brought in, and the sequencing is right.

“We need to bring more people together, more portfolios of government, and more levels of government to deliver more housing more quickly,” Copp said.

His preferred model is the delivery authority approach, where a single body is accountable for creating an entire place, road, rail, social infrastructure, hospitals, schools, all of it sequenced together. The Bradfield Delivery Authority in Western Sydney is an example of this thinking in practice.

For property investors and buyers, the message is clear. Mass transit corridors are where housing growth will follow. The Queensland government’s own data already shows that the areas people are choosing to live in Brisbane are clustering along new transit corridors. That pattern will repeat in every major Australian city as the next wave of infrastructure is built.

Key takeaways

• Australia will reach 40 to 41 million people by 2065. Sydney and Melbourne will become megacities by global standards. Infrastructure planning needs to operate on that timeframe now.

• Mass transit is the most powerful lever governments have for unlocking housing supply