Australian Property Market October 2026: September Review & Property Development Outlook
September sent Australian property developers a clear message: property is getting cheaper, but developing property isn't necessarily getting easier.
Australia's housing downturn has broadened considerably. Home values are falling across most capital-city markets, buyers have become more cautious, properties are taking longer to sell and negotiating power is shifting away from vendors.
At first glance, that sounds like exactly the environment property developers have been waiting for.
Cheaper sites. Less competition. More motivated vendors. Better negotiating power.
But there's another side to the equation.
Construction costs remain elevated. Development finance is expensive. Borrowing capacity has fallen. Valuations are becoming increasingly important to funding outcomes. And weaker property prices can reduce the Gross Realisation Value (GRV) of a development faster than the land price adjusts.
So as September ends and we look towards October 2026, the question for developers isn't simply:
“Is now a good time to buy property?”
It's:
“Are development sites finally becoming feasible again?”
Let's look at what changed during September, and what the current numbers suggest could happen next.
September 2026 Australian Property Market: The Downturn Has Spread
The Australian property market correction is no longer concentrated in a few premium suburbs.
National dwelling values fell 0.9% in August, the fifth consecutive monthly decline, leaving values approximately 3.6% below their March peak. Even more telling, Cotality reported that 93% of capital-city suburbs recorded declining values through winter, compared with less than half during autumn.
That is a significant change in market direction.
Sydney remains one of the weakest major markets, while Melbourne, Canberra, Brisbane, Adelaide and Perth have also experienced declining values.
For property developers, however, the national median isn't necessarily the number that matters most.
The bigger question is:
What is happening to the exact product you're planning to sell in 18 or 24 months?
Because Australia's property downturn isn't affecting every dwelling equally.
Sydney Property Market: Premium Property Is Feeling the Pressure
The higher end of the housing market has experienced some of the largest corrections.
Cotality reported upper-quartile house values sitting approximately 10.7% below peak levels in Sydney and 10.5% below peak in Melbourne. Lower-priced housing and units have generally shown greater resilience.
That distinction is particularly important for developers.
Imagine you're assessing a townhouse development where each completed dwelling is expected to sell for $2 million.
A 5% reduction in achievable selling prices doesn't sound catastrophic.
But across five townhouses:
$2,000,000 × 5 = $10,000,000 GRV
A 5% reduction becomes:
$500,000 less development revenue.
And that $500,000 generally comes almost directly out of the developer's margin unless another cost can be reduced.
That's why developers need to be extremely careful about using comparable sales achieved six or twelve months ago to support today's feasibility.
Yesterday's comparable sale may not represent tomorrow's settlement price.
Property Turnover May Be Telling Us More Than Property Prices
Falling house prices make headlines.
But one of September's more important developments has been the slowdown in property transactions.
Properties are taking longer to sell. Buyers are hesitating. Stock is accumulating. Competitive tension has reduced.
Cotality reported median selling times increasing to around 39 days compared with 28 days a year earlier, while capital-city sales volumes were also lower over the year. Reuters separately reported a sharp recent decline in housing turnover, with activity around 15% below year-earlier levels since June.
For developers, this matters enormously.
Your feasibility doesn't finish when construction reaches Practical Completion.
It finishes when the completed properties sell and settle.
If five townhouses were expected to sell within three months but instead take nine months, the project may incur another six months of:
Development interest;
Rates and land tax;
Insurance;
Utilities and maintenance;
Marketing;
Lender fees; and
Opportunity cost on trapped equity.
Suddenly, achieving your forecast selling price doesn't necessarily mean achieving your forecast profit.
GRV tells you how much you might receive. Your sales programme tells you when you receive it.
Both belong in the feasibility.
Is Australia Becoming a Buyer's Market?
Increasingly, yes, but that doesn't necessarily mean buyers are rushing back.
That's one of the unusual characteristics of the September property market.
Purchasers have more choice.
Competition has reduced.
Properties are taking longer to sell.
Vendors may be more willing to negotiate.
Yet many buyers remain hesitant because of interest rates, borrowing capacity, affordability and uncertainty about further price falls.
For property developers, that combination could eventually create opportunity.
We expect developers to increasingly encounter:
Stale listings
Motivated vendors
Failed campaigns
Reduced competition for development sites
Distressed sales and vendors willing to negotiate longer settlement or due-diligence periods.
But there's an important distinction:
A motivated vendor doesn't automatically make a property a good development site.
The acquisition price still needs to work within the development feasibility.
Development Site Values: Falling House Prices Don't Tell the Whole Story
A development site shouldn't simply be valued by looking at what the house next door sold for.
Developers need to work backwards.
A simplified residual land value calculation looks something like this:
Realistic Development Revenue (GRV)
Construction Costs
Consultants & Approvals
Infrastructure & Contributions
Marketing & Selling Costs
Taxes & Transaction Costs
Required Developer Return
= Residual Land Value
This is why a falling property market can create a strange situation.
The vendor might reduce their asking price by $200,000.
But if the development's expected GRV has fallen by $600,000, the site may actually be less attractive than it was before the discount.
Cheaper Land Doesn't Necessarily Mean More Development Profit
Consider a simplified development feasibility.
Previous Feasibility | September Scenario | |
Land Acquisition | $2.50m | $2.35m |
Construction | $5.00m | $5.10m |
GRV | $10.00m | $9.50m |
Land Saving | — | +$150k |
Construction Increase | — | -$100k |
GRV Reduction | — | $500k |
The developer has negotiated $150,000 off the site.
Great deal?
Not necessarily.
Construction has increased by $100,000.
Expected sales revenue has fallen by $500,000.
The project is therefore approximately $450,000 worse off before we even consider additional finance, holding costs or selling delays.
That's the trap developers need to avoid heading into October.
Don't confuse falling land prices with improving development feasibility.
Construction Costs Remain a Major Development Challenge
This is arguably the biggest disconnect in today's property development market.
Property prices are falling.
But building costs haven't followed them down.
The RBA reported new-dwelling construction prices increasing 1.8% in the June quarter and 5.3% over the year, with material and other input costs continuing to affect construction pricing.
That means developers can potentially be squeezed from both directions:
GRV ↓
While
Construction Costs ↑
That's margin compression.
And because the developer's profit is the residual amount left after everyone else gets paid, relatively small movements can have a disproportionately large impact on the developer's return.
A project showing a $1.5 million profit doesn't need costs to increase by $1.5 million to become unattractive.
A few hundred thousand dollars of construction escalation, combined with weaker sales values and additional interest, can change the commercial outcome very quickly.
Development Finance Could Be the Difference Between Opportunity and Disaster
Development finance remains one of the biggest variables entering October.
As at 28 September, Australia's cash rate stands at 4.35%, following three increases during 2026. The RBA's September monetary-policy decision is due on 29 September.
But property developers shouldn't focus exclusively on the RBA cash rate.
Development finance is about considerably more:
Interest Rate + Line Fees + Establishment Fees + Valuation + LVR/LTC + Presales + Equity + QS Requirements + Drawdowns + Interest Capitalisation + Peak Debt
And falling values introduce another major risk.
Valuation risk.
Suppose you negotiate a development site for $3 million.
Your equity is ready.
Then the lender's valuer assesses the property at $2.7 million.
If the lender advances against the lower valuation, someone has to contribute the additional equity.
Usually that's the developer.
The same problem can occur with the project's end value.
If the lender adopts a lower GRV than the developer, borrowing capacity may reduce again.
A profitable development isn't necessarily a fundable development.
That's why finance should be tested before unconditional acquisition wherever possible, not treated as something to organise after the site has already been secured.
Housing Supply Is Needed. But Can Developers Afford to Build It?
But wanting more housing and being able to develop it profitably are two very different things.
The latest ABS data available at the time of writing showed 17,687 dwellings approved in July, down 3.6% from June, although still higher than a year earlier. Private-house approvals declined 4.2%, while the value of residential building approvals fell 4.9%.
The challenge becomes clearer when approvals are compared with construction activity.
A development still needs to move through:
Planning → Documentation → Finance → Procurement → Construction → Completion → Sales
And at every stage, another project can become unviable.
A Development Approval doesn't build a house. Feasibility does.
If the combination of land, construction and finance exceeds realistic development revenue, the project may remain approved but unbuilt.
For developers who can solve that equation, constrained future supply may eventually create opportunity.
But housing shortages don't make bad developments profitable.
Affordable Housing and Units Could Be October's More Resilient Segment
One of the more interesting themes emerging from September is the relative resilience of affordable property and units compared with premium detached housing.
That shouldn't be ignored by developers.
Higher interest rates reduce borrowing capacity.
But purchasers don't necessarily disappear.
They adjust.
A purchaser who can no longer finance a $2 million detached house might look at a $1.5 million townhouse.
Someone priced out of that townhouse may consider a $950,000 apartment.
This means developers need to think beyond maximum yield.
The better question may be:
What can our target purchaser actually afford when this development reaches completion?
That should influence dwelling mix, size, specification, parking, design, density and ultimately selling price.
In a more difficult market, product-market fit becomes increasingly important.
Could October 2026 Be a Better Time to Buy Development Sites?
This is where things become interesting. Our expectation is that October will create more development-site opportunities, but not necessarily more profitable developments.
There's a difference.
If current conditions persist, we expect to see more:
vendor negotiation, stale listings, failed campaigns, longer selling periods, reduced competition and development-site owners gradually adjusting price expectations.
That can create opportunities for developers with equity, finance and patience.
But developers shouldn't try to catch the bottom of the market.
The objective isn't to buy a site because it has fallen 10%.
The objective is to buy it below the maximum price the development can commercially support.
A property isn't cheap because it used to cost more. It's cheap only when the development economics justify today's purchase price.
Australian Property Market Outlook: What We Expect in October 2026
Based on September's market direction, our expectation for October is continued softness rather than an immediate property-market rebound.
That doesn't mean every city, suburb or property type will behave the same way.
But several trends are likely to remain important.
1. Property Values Are Likely to Remain Under Pressure
The momentum entering October remains weak.
We expect values to remain under pressure, particularly where affordability is stretched and buyers have plenty of stock to choose from.
That doesn't necessarily mean dramatic monthly falls.
It means we see limited evidence at this stage for a sudden broad-based rebound.
2. Premium Sydney and Melbourne Property Could Remain Vulnerable
Higher-priced housing remains particularly exposed because buyers have greater discretion over whether and when they transact.
For developers targeting premium purchasers, conservative GRV assumptions remain essential.
October probably isn't the month to build a feasibility around aggressive future capital growth.
3. Units, Townhouses and More Affordable Housing May Continue to Outperform
Affordability should continue influencing purchaser behaviour.
That could provide comparatively stronger support for well-located units, townhouses and lower-priced houses.
For developers, this reinforces a simple principle:
Build what the market can afford, not simply what the planning controls allow.
4. Selling Time Could Matter More Than the Next 1% Price Movement
We expect transaction volumes and days on market to remain important indicators through October.
If prices decline only modestly but properties take significantly longer to sell, the financial impact on a development can still be substantial.
Developers should therefore stress-test sales periods as well as sales prices.
5. Development-Site Negotiating Power Should Continue Moving Towards Buyers
This may be the biggest opportunity.
Development-site vendors often adjust more slowly than the residential market because their price expectations are anchored to previous sales or development potential.
If market weakness continues, we expect more vendors to begin accepting that development potential does not automatically equal development value.
That could open acquisition opportunities.
6. Development Finance Will Remain a Major Constraint
We don't expect October to suddenly bring cheap development finance.
Even if interest rates stabilise, lender valuations, equity requirements, presales, servicing and leverage will remain important.
Developers should continue modelling conservative funding assumptions.
7. Construction Prices Are Unlikely to Collapse
A weaker property market doesn't automatically mean builders suddenly become cheap.
There may be improved tender competition in certain areas, but labour, materials, subcontractor capacity, programme and contractor risk remain.
Any feasibility relying on a dramatic reduction in construction costs deserves careful scrutiny.
October 2026: A Developer's Market Could Be Starting to Emerge
September confirmed that Australia's property cycle has changed. The days of assuming tomorrow's selling price will automatically exceed today's are gone, for now.
But weaker markets create their own opportunities.
Less competition.
More negotiating power.
Motivated vendors.
Longer due-diligence periods.
Potentially better acquisition structures.
And eventually, better development margins.
Our outlook for October is therefore cautiously opportunistic.
We expect the broader real estate market to remain soft, premium housing to remain vulnerable and transaction activity to stay subdued.
At the same time, we expect development-site opportunities to gradually improve for well-capitalised developers prepared to negotiate hard, undertake proper due diligence and walk away when the feasibility doesn't work.
That last point matters.
The best developers in a falling market aren't necessarily the ones buying the most sites.
They're often the ones rejecting the most.
Because the objective isn't simply to buy cheaply.
It's to buy at a price that leaves sufficient margin for construction risk, finance risk, planning risk, market risk—and developer profit.
Don't buy because the market has fallen. Buy because the feasibility works.
At OwnerDeveloper, we assess property development opportunities from the complete commercial perspective—from site acquisition, due diligence and development feasibility through planning, finance, procurement and construction.
Because in this market, finding a property is easy. Finding a development that still makes money is the opportunity.
Frequently Asked Questions
What is the outlook for the Australian property market in October 2026?
Based on September's trends, we expect continued softness rather than an immediate market rebound. Higher borrowing costs, weaker buyer confidence and longer selling periods are likely to keep pressure on values, although performance should vary considerably by city, suburb and property type.
Is October 2026 a good time to buy a property development site?
October could create better acquisition opportunities, with less competition, longer selling periods and potentially more negotiable vendors. However, a cheaper site isn't automatically a profitable development. Developers should assess residual land value using realistic GRV, construction, finance, approval and selling-cost assumptions before purchasing.
How are falling property prices affecting property developers?
Falling prices can reduce both development-site values and the expected GRV of completed projects. If end values fall faster than land and construction costs, development margins can actually deteriorate despite cheaper acquisition opportunities.
Which property types could perform better in October 2026?
September data showed units and more affordable properties generally proving more resilient than premium detached housing. For developers, this reinforces the importance of delivering dwellings at price points buyers can realistically finance rather than simply maximising size or specification.
What should property developers watch in October 2026?
Key indicators include property values, transaction volumes, days on market, interest rates, development-finance conditions, lender valuations, building approvals, construction tender prices and development-site vendor expectations. Together, these provide a much clearer picture of development feasibility than property prices alone.
Disclaimer: OwnerDeveloper’s blogs are provided for general information and educational purposes only. They do not constitute financial, legal, tax, investment or other professional advice. Every property development involves unique circumstances and risks. Readers should seek independent advice from appropriately qualified professionals before making any investment, financial or development decisions.
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