The federal government’s 1.2 million homes target always sounded ambitious. It is a clean number and a clear political commitment.

“The issue is that housing markets do not respond to commitment. They respond to feasibility.”

In recent weeks, even commentators broadly supportive of aggressive supply reform have begun questioning whether the target was ever realistically achievable under current cost and labour conditions. That shift is notable. Not because it changes the arithmetic, but because it acknowledges what has been evident for some time: the constraint is structural, not rhetorical.

Before reacting to headlines about targets “slipping” or hopes being “kept alive,” it helps to separate the issue into three distinct parts:

• What governments announce.
• What can physically be delivered.
• What the market does in response.

Each operates on a different set of incentives and constraints.

The Feasibility Constraint

“Supply is not constrained by a lack of ambition. It is constrained by developer margins.”

In many parts of the country, it currently costs materially more to deliver a new dwelling than comparable near-new stock trades for. As a simple illustration, if delivery costs sit at $820,000 but banks value the finished townhouse at $750,000 based on comparable sales, the project does not proceed. Policy language does not close that gap.

Developers build when risk-adjusted returns exceed their cost of capital. If finance cannot be secured at a level that supports that return, projects stall.

Construction costs remain elevated. Labour remains tight. Financing remains disciplined. Those three variables drive completions far more than national targets.

Supply is ultimately governed by project feasibility.

What Happens When Targets Slip?

If housing completions undershoot demand growth, the outcome is not automatically a spike in prices.

Prices are primarily a function of borrowing capacity and expectations. Rents are primarily driven by household formation, income growth, migration and dwelling availability.

If migration remains elevated while construction remains constrained, pressure tends to show up first in the rental market.

There is precedent. In the mid-1980s, when rental property losses were temporarily quarantined and investor participation declined at the margin, rents rose sharply in Sydney and Perth, where vacancy was already tight. The policy setting was different, but the mechanism was similar. When supply is thin, marginal changes in participation are amplified.

We have seen a version of that dynamic over the past three to four years. Tight vacancy rates allowed rents to move quickly because there was limited slack in the system.

The Composition Shift Most Commentary Misses

When supply undershoots and demand persists, standard economic theory suggests prices rise. The nuance at this stage of the cycle is that price increases are unlikely to be evenly distributed. Capital flows to the housing types and locations that remain accessible.

If investor participation softens at the margin, first home buyers often fill part of that space in entry-level segments. Transaction volumes can continue. What changes is the composition of buyers. Aggregate growth may remain intact even as internal dynamics shift.

At the same time, mid-market and discretionary transactions become more sensitive to borrowing ceilings. Campaigns still proceed, but the pool of eligible buyers narrows, which moderates price growth.

This is when markets stop behaving like a single organism and begin behaving like multiple sub-markets under the same headline.

Why the Narrative Shift Matters

The shift in commentary from “how do we hit 1.2 million” to “was 1.2 million ever feasible” matters because expectations shape capital allocation.

If policymakers, developers and lenders accept that delivery will lag ambition, behaviour adjusts:

• Developers focus only on sites where margins are viable.
• Lenders tighten feasibility thresholds.
• Investors prioritise assets that perform under slower turnover.

The system becomes more selective.

What Actually Moves From Here

The variables that will determine outcomes over the next few years are not the housing target itself, but:

• The trajectory of borrowing capacity.
• The pace of migration relative to completions.
• Whether developer margins are restored.

If supply continues to lag population growth, rental pressure remains underpinned, constrained only by tenants’ ability to pay.

If credit conditions ease meaningfully, prices tend to respond first. If they tighten, price growth moderates even while structural supply pressure builds beneath the surface.

“Targets do not build homes. Feasible margins and available credit do.”

In housing, headlines move faster than foundations. Foundations determine durability.

And in the end, arithmetic always wins.