Decades of archaic planning regulations are forcing developers to build thousands of unwanted car parking spaces, adding up to $137,000 to the cost of a single apartment and driving up rents for those who can least afford it. A groundbreaking report by the Grattan Institute reveals that over the next five years, Australia is on track to waste $5.2 billion building 86,000 completely unnecessary parking spots. By eliminating these outdated mandates, state governments could unlock thousands of affordable homes, slash construction times, and finally address the core structural failure of the modern housing market.
This is not a story about transport preference. It is a story about an invisible tax embedded into the slab of every new apartment building.
The Cost of Dead Space
For over half a century, local councils have operated under a simple, flawed doctrine. Every new bedroom requires a corresponding slice of off-street asphalt or concrete. Born in the automotive boom of the 1950s, these minimum parking requirements were meant to keep residential streets clear. Today, they act as an economic stranglehold.
The data reveals a stark disconnect between regulatory imagination and urban reality. In major metropolitan centers, roughly 40 percent of studio and one-bedroom apartment residents do not even own a vehicle. Yet, the planning system treats them as if they have a fleet idling in the basement.
The financial penalty for this policy failure is severe. According to the Grattan Institute, complying with these rules inflates construction costs by staggering amounts depending on the city.
| City | Average Cost Added to a 2-Bedroom Apartment |
|---|---|
| Perth | $137,000 |
| Brisbane | $113,000 |
| Adelaide | $95,000 |
| Sydney | $70,000 |
| Melbourne | $62,000 |
Building underground parking is a brutal engineering challenge. It requires deep excavation, extensive retaining walls, complex ventilation, and heavy structural reinforcement. When a developer spends $100,000 to dig a hole for a car that will never park there, that cost does not vanish. It is added straight to the purchase price, or passed directly down to the tenant in weekly rent.
Worse still, these costs alter the math of housing supply. Every development project requires a specific rate of return to secure bank financing. If the mandated cost of digging a multi-level basement pushes a project below that financial threshold, the project is canceled. The Grattan Institute estimates that eliminating parking minimums could instantly tip 140,000 stalled dwellings in Sydney and Melbourne back into commercial feasibility.
The Subsidized Car and the Punished Tenant
The current system forces a regressive redistribution of wealth. A tenant who cannot afford a vehicle, or who chooses to rely entirely on public transit, is still forced to pay for a parking spot bundled into their lease.
"If we got rid of these rules and built more housing, it's rents at the lower end of the spectrum that would go down the most," notes housing researcher Jonathan Behrens. "Really the biggest burden of these rules falls on the people who have the least capacity to pay."
In modern high-density complexes, off-street parking accounts for up to 13 percent of the total built floor space. On any given night, up to 40 percent of those spaces sit entirely vacant. This is dead capital. It is concrete that serves no human purpose, absorbing billions of dollars in construction materials and labor that should be deployed to build roughly 9,000 actual homes instead.
The obvious solution is to unbundle the asset. If an apartment and a parking space are sold or leased independently, the market can price them accurately. A resident who needs a space can rent one; a resident who does not can save thousands of dollars a year. While digital marketplaces have emerged to allow residents to lease out their empty spaces informally, the structural planning rules still prevent developers from decoupling these spaces from the outset.
Why Rational Reform Fails at the Local Level
If the economic and social arguments for removing parking minimums are so clear, why do they persist in almost every local government planning scheme?
The answer lies in the intense, hyper-local nature of municipal politics. Local councillors operate in an environment dominated by vocal, entrenched residents who view any reduction in mandated parking as a direct threat to their ability to park easily on the street.
When a new development is proposed without a massive basement garage, the immediate reaction from neighbors is anxiety over street congestion. Talkback radio lights up. Angry emails flood council inboxes. Traders worry that customers will look elsewhere. Everyone wants abundant parking, but nobody wants to pay the structural premium required to build it off-street. Faced with this immediate political backlash, local representatives almost always choose the path of least resistance: they maintain the mandates.
This political gridlock means local councils are fundamentally incapable of fixing the problem they created.
The Path to Dismantling the Mandates
To break the deadlock, state governments must step in and strip local councils of their power to mandate parking minimums. This is not a radical or untested theory.
Consider the precedent set across the Tasman. In 2020, the New Zealand government passed the National Policy Statement on Urban Development, which completely banned local councils from enforcing minimum parking requirements in tier-one and tier-two urban areas. The sky did not fall. Instead, developers began building diverse housing options tailored to actual buyer demand, including townhouses and apartments without parking spaces, lowering entry prices for first-home buyers.
Scrapping mandates does not mean banning parking. It simply removes the legal obligation to build it where it is not wanted. If a developer believes a luxury three-bedroom apartment in a wealthy suburb requires two parking spaces to sell, they will build them. But if they are building micro-apartments next to a major train station for young workers, they can omit the garage entirely.
To manage the transition, cities must replace rigid building rules with active street management. This means deploying time limits, resident permit schemes, and demand-responsive pricing for on-street parking in high-density zones. If the street space is managed properly, the fear of overflowing cars evaporates.
The housing crisis will not be solved by a single policy shift, but eliminating the mandatory concrete tax is the most immediate way to lower the cost of new builds. State premiers need to look at the $5.2 billion currently slated to be buried in useless concrete vaults over the next five years, override local council resistance, and clear the path for houses instead of empty bays.
