In short: Australia is projected to build more than 106,300 fewer dwellings than demand requires by 2029. A shortfall of that size does not spread evenly — it concentrates where population growth is fastest and where planning, labour and finance constraints bind hardest, which means outer growth corridors and the middle ring of the largest capitals.

Key takeaways

The shortfall is a flow problem: completions are running behind household formation, and the gap compounds each year.
Construction finance is itself a constraint — higher rates raise feasibility hurdles and stall projects.
Supply shortfalls support both prices and rents, which is why affordability pressure appears in both at once.
Buyers in undersupplied corridors face competition; investors face low vacancy but also rising build costs.

Why is the gap opening?

Four constraints are binding simultaneously:

Finance. With the cash rate at 4.35%, development feasibility calculations that worked at lower rates no longer clear their hurdle, so projects are shelved rather than started.
Construction costs and capacity. Materials and labour costs have reset higher, and insolvencies among builders have removed capacity from the market.
Planning throughput. Approval timeframes and infrastructure sequencing limit how quickly zoned land becomes completed dwellings.
Household formation. Smaller average household size means more dwellings are needed per head of population than a generation ago.

What does it mean for a borrower?

Undersupply supports prices, which cuts in two directions depending on which side of the transaction you are on:

Situation	Effect
Saving a deposit	Target keeps moving; prices may rise faster than you save
Already own	Equity supported, which can help you refinance below 80% LVR
Renting while saving	Squeezed from both directions — rising rents slow deposit accumulation
Investing	Low vacancy supports rents, but build costs and finance costs are elevated

This is the mechanism behind the standard advice that in an undersupplied market the cost of waiting can exceed the cost of an LMI premium.

Where does it concentrate?

Shortfalls concentrate where demand growth is fastest relative to completions — typically the outer growth corridors of Melbourne, Sydney, Brisbane and Perth, and the middle ring where land supply is fixed.

Regional centres within commuting distance of a capital have absorbed spillover demand, which is why commuter-belt markets have seen both price and rent pressure despite being outside the metropolitan boundary.

For a specific location, the practical test is to compare dwelling approvals in the SA2 against population growth in the same area. Where approvals are running well behind, pressure is likely to persist.

Frequently asked questions

Will building more houses lower prices?

Sustained supply above demand reduces price pressure, but the effect is slow — a dwelling approved today may complete in two to three years. Supply is a medium-term lever, not a short-term one.

Do government schemes help with a supply shortfall?

Demand-side measures such as deposit guarantees improve access for individual buyers but do not add dwellings, and can add to competition for the same stock. Supply-side measures address the shortfall directly but act with a longer lag.

Should I buy in a corridor with heavy approvals?

Heavy approvals mean you will compete with new stock when you sell, which can restrain growth. It also usually means lower entry prices and modern housing. It is a trade-off between entry price and future competition rather than a simple good or bad signal.

Related reading

Sources

State of the Housing System report — National Housing Supply and Affordability Council
Building activity and approvals — Australian Bureau of Statistics

Information current as at 2 August 2026.

General advice warning: This article contains general information only. It does not take into account your objectives, financial situation or needs, and it is not personal credit or financial advice. Consider whether it is appropriate for you and seek advice from a licensed credit representative before acting.

Any interest rate shown is an example only and is not an offer of credit. Where a rate is quoted, the applicable comparison rate is available from the relevant lender and should be considered alongside it.