The property market you read about and the market you’re selling into are eighteen months apart

Market analysis  ·  September 2026

The $12.6 trillion number is true. It is also the wrong number.

Australia’s housing stock has never been worth more. Its transaction market has been contracting for most of this year. Both statements are correct, and only one of them tells you what your property will do at auction next month.

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Every few weeks a figure arrives that says the property market has reached a new record. In March 2026 the Australian Bureau of Statistics put the total value of Australia’s residential dwellings at $12,772.6 billion, up $315.9 billion in a single quarter. Cotality’s own estimate, published monthly, sits at $12.6 trillion against $2.6 trillion of outstanding mortgage debt. These are the numbers that get repeated at dinner parties and in listing presentations.

They are also, for anyone actually contemplating a sale, close to useless.

The reason is not that the numbers are wrong. It is that they measure a different thing from the one most people think they measure. A stock valuation tells you what the country’s 11.5 million dwellings are collectively estimated to be worth, revalued periodically and released with a lag. A transaction measure tells you how many people are buying, at what price, and how long it is taking. In a stable market the two move together and the distinction is academic. In a turning market they separate — and this year they have separated sharply.

What the stock number shows

The ABS series is a clean upward line. Since the June quarter of 2023 the total value of Australian dwellings has climbed from $10,101.6 billion to $12,772.6 billion, without a single quarterly fall. The mean dwelling price is now $1,111,100 nationally and $1,324,800 in New South Wales, the highest in the country.

Total value of Australia’s residential dwellings

Quarterly, $ billion, June 2023 to March 2026. Twelve consecutive quarters of growth.

Read on its own, that chart describes a market in rude health. Read alongside the transaction data, it describes a market being revalued upward on the strength of sales that happened months ago.

A stock valuation is a photograph of the past. A sales volume is a reading of the present.

What the transaction data says

Cotality’s rolling estimate of national sales rose steadily through the recovery, from 470,755 in the year to September 2023 to a peak of 560,979 in the year to December 2025. It has been falling since. By May 2026 the rolling annual count had eased to 556,733, and the quarterly reading is where the damage is visible: sales over the three months to August 2026 were tracking 15.5 per cent lower than the same period a year earlier and 11.5 per cent below the five-year average. Sydney, Brisbane and Perth each recorded transaction declines of more than 20 per cent.

National home sales, rolling twelve months

Cotality modelled estimates at successive reporting dates. The annual count peaked in December 2025 and has been easing since.

Values followed, as they always do. Cotality’s national Home Value Index fell 0.9 per cent in August 2026, a fifth consecutive monthly decline, leaving national values 3.6 per cent below their March peak. The more telling figure is the breadth: the proportion of capital city suburbs recording a fall in values rose from 45.8 per cent in autumn to 93 per cent through winter. This is no longer a story about the top of the market. It is the whole market.

Change in dwelling values, three months to August 2026

Every capital city except Darwin recorded a decline over winter.

Credit is the mechanism

None of this is mysterious. The Reserve Bank raised the cash rate three times in the first half of 2026, to 4.35 per cent, and held in June. Housing credit growth, which had accelerated to 7.1 per cent in the year to February 2026 from 4.2 per cent in the year to September 2023, slowed to 0.5 per cent in July — on Westpac’s unrounded measure, 0.49 per cent, the weakest month since March 2025. Housing accounts for roughly 62 per cent of all credit outstanding in Australia, so when that engine slows, everything downstream slows with it.

The composition matters more than the headline. Investor credit is doing most of the adjusting, and Westpac attributes that principally to the changes to investment property tax settings rather than to interest rates alone. New lending is turning too: the ABS recorded 134,225 new loan commitments worth $97.6 billion in the June 2026 quarter, down 5.4 per cent in number and 5.2 per cent in value on the March quarter, even though the annual value comparison remains positive at 6.8 per cent.

Borrowing capacity sets price. It always has. When it contracts, the effect shows first in the number of bidders, then in clearance rates, then in the index — in that order, over months.

Sydney is leading it

Sydney dwelling values fell 1.4 per cent in August and 4.7 per cent over the three months to August, the steepest quarterly decline of any capital, taking the median to $1,222,718 and leaving the market 7.1 per cent below its February 2026 peak. For comparison, at the equivalent stage of the 2022–23 correction Sydney was down 6.6 per cent. This one is moving faster.

Supply is the quiet part of the story. Capital city listings over the four weeks to 30 August ran 24 per cent above the same period last year and 8 per cent above the five-year average — despite the flow of new listings running 6 per cent lower than a year ago. As Cotality’s research director Tim Lawless puts it, higher stock levels are a function of a slower rate of absorption, not a flood of new sellers. Homes are simply sitting. Auction clearance rates have held below 50 per cent.

The upper end has been leading the decline, though the gap between upper and lower quartile performance has narrowed as the downturn broadened. For prestige vendors in the Eastern Suburbs this is the material point: the segment that fell first is not yet the segment that has finished falling, but it is no longer the only one moving.

Higher stock levels are not a wave of new sellers. They are the same sellers, staying longer.

What limits the fall

There is a serious argument on the other side, and it deserves to be stated plainly rather than buried. Aggregate outstanding mortgage debt of $2.6 trillion against $12.6 trillion of housing value is a debt-to-value ratio of around 20 per cent at the national level. That is the single best explanation for why two years of rate increases have not produced forced selling. Unemployment remains low. New housing supply remains structurally short of underlying demand, with construction costs and feasibility constraints limiting any material lift in completions. First home buyer incentives continue to support the affordable end.

Rental conditions point the same way. The national vacancy rate of 1.9 per cent in August is the highest since January 2025 but still well under the pre-COVID decade average of 3.3 per cent, and gross rental yields have risen to 3.79 per cent nationally, the highest since September 2019 — the arithmetic consequence of rents rising while values fall.

My own reading — and this is my assessment rather than a published forecast — is that these factors limit the depth of the correction without changing its direction. A market can decline for a considerable period without anyone being forced to sell. That is precisely what makes it dangerous for vendors who price to the headline.

What this means if you are selling

Three practical consequences follow.

• Price to the transaction data, not the valuation data. Your automated estimate, your rates notice and the national headline are all built on comparable sales that settled months ago. The bidders in your room are working from this month.
• Assume a longer campaign and budget for it. Selling times have extended and vendor discounting has widened. A campaign designed for a 2025 market will run out of momentum before it runs out of buyers.
• Treat the first three weeks as diagnostic. In a market absorbing stock slowly, early enquiry volume is the most honest information you will receive, and it arrives while you can still act on it.

None of this argues against selling. Markets like this one reward vendors who read them accurately and punish those who wait for a number that has already passed. It does argue against outsourcing your judgement to a trillion-dollar aggregate that was never designed to answer the question you are actually asking.