Sydney's Housing Pipeline Is an Optical Illusion
For years, planning ministers, property developers, and local councils have pointed to housing approval numbers as proof that Sydney is doing enough to tackle its affordability and supply crisis. But a closer look at the data tells a starkly different story — one of demolished homes, stalled sites, and a growing graveyard of so-called "zombie projects" that exist on paper but nowhere else.
New analysis of Australian Bureau of Statistics (ABS) figures has laid bare the true extent of Sydney's housing crisis, revealing that the city is building far fewer new homes than the headline approval numbers would suggest. The gap between what is approved and what is actually built is widening at a time when Sydney desperately needs every dwelling it can get.
What the ABS Figures Actually Show
Over the most recently measured year, 25,552 dwellings were approved for construction across Sydney. On the surface, that sounds like meaningful progress in a city that has been battling a chronic shortage of housing supply for over a decade. But dig deeper, and the picture collapses quickly.
During the same period, 4,331 homes were demolished across the city. That is more than four thousand existing dwellings — houses, apartments, and units where people once lived — simply gone. When you subtract those demolished homes from the approval figures, the true net increase in Sydney's housing stock shrinks dramatically. Experts have calculated that the real uplift in dwellings is approximately 16 per cent lower than the headline approvals figure would indicate.
This demolition blitz is not being discussed loudly enough in planning or policy circles. Every time an older house is knocked down to make way for something new — or, in many cases, for nothing at all — it strips another dwelling from the city's already stretched supply. The approvals headline becomes not just misleading but actively distorting the public's understanding of the crisis.
The Rise of Zombie Projects in Sydney
The demolition problem is compounded by an equally troubling phenomenon: zombie projects. These are development sites where council approval has been granted, planning hurdles have been cleared, and theoretically nothing stands in the way of construction — except the economics simply do not stack up.
A zombie project is one where developers received the green light from local councils but have not laid a single brick. Many of these sites have been sitting untouched for months, sometimes years. The approvals are technically active, the projects appear in the pipeline data, and they inflate housing supply statistics — but they represent zero actual homes for zero actual people.
Why does this happen? In many cases, the combination of rising construction costs, elevated interest rates, and sluggish pre-sales means that proceeding with a development would result in a financial loss for the developer. It becomes cheaper to sit on an approved site and wait than to build at a loss and absorb the consequences. From a business standpoint, this makes some sense. From a housing policy standpoint, it is a disaster.
Construction Costs Are Killing Feasibility
Sydney's construction sector has been hammered by cost pressures in recent years. Labour shortages, global supply chain disruptions, the rising cost of materials from steel to timber, and inflationary pressure across the economy have all contributed to a dramatic increase in what it actually costs to put up a building.
Developers who locked in approvals and ran feasibility studies several years ago are now finding that those numbers bear no resemblance to reality in the current market. A project that was viable at a construction cost of $400,000 per apartment may now cost $550,000 or more per unit to complete — and that is before factoring in finance costs, holding costs, and the uncertainty around what pre-sales will achieve in a cooling market.
This feasibility gap is the engine driving zombie project growth across Sydney. And because those approved sites still appear in government housing supply figures, the scale of the problem is obscured from public view.
Policy Implications: Are Approvals the Wrong Metric?
The core issue exposed by this analysis is that Sydney — and arguably Australia more broadly — has been measuring housing supply success using the wrong indicator. Approvals are easy to count and politically convenient to cite. Completions, net additions to housing stock, and actual occupancy tell a very different and far more uncomfortable story.
Housing advocates and economists have long argued that Australia needs a much more rigorous, transparent approach to measuring housing delivery. That means:
- Tracking net housing additions rather than gross approvals, subtracting demolitions from every reporting period
- Monitoring the conversion rate from approval to construction commencement across all development types
- Identifying zombie project sites and introducing mechanisms to either unlock them or return them to the active supply pool
- Incentivising developers to begin construction within a defined window of receiving approval, or risk losing planning permission
Without these kinds of reforms, approvals remain a vanity metric — a number that makes politicians look productive while the housing shortage deepens year after year.
What This Means for Sydney Residents and Renters
For ordinary Sydneysiders — renters paying record rents, first-home buyers shut out of the market, and families doubling up in too-small homes — the zombie project problem and the demolition drain have very real consequences. Every phantom dwelling in the pipeline data is one fewer actual home available to house a person or a family.
Sydney's rental vacancy rate has hovered near historic lows, and median rents have climbed sharply across virtually every suburb and dwelling type. The pressure is not easing. And as long as housing supply figures are inflated by approvals that never translate into actual builds, policymakers will remain insulated from the urgency required to enact meaningful change.
The Path Forward
Solving Sydney's housing crisis requires confronting uncomfortable truths about how the system currently works — and how it is being measured. Zombie projects must be identified, quantified, and addressed through targeted policy interventions. Demolition figures must be incorporated into every headline housing supply announcement. And the approvals-to-completions pipeline must be scrutinised far more rigorously than it has been to date.
Sydney cannot build its way out of a housing shortage using projects that exist only in planning databases. The city needs homes that are real, built, and occupied. Until policymakers close the gap between the headline figures and the ground-level reality, the housing crisis will continue — hidden, in plain sight, behind a wall of misleading numbers.