South Australia, June Quarter 2026: A Record Dwelling Pipeline and Record Public Investment
Public Investment Intensity (21810), South Australia +1.7925σ Q2 2026
State Completion Lag (21840), South Australia +0.2062σ Q2 2026
Construction Completion Lag (21290) +2.0205σ Q2 2026, national
Building Approvals & Commencements (21510) +0.4936σ Q2 2026, national
Scope and Purpose
South Australia began 15,401 dwellings in the four quarters to June 2026, the most in any four quarters since the Australian Bureau of Statistics (ABS) series began in 1984, and at the end of June it had 15,880 dwellings under construction, also a record. Over the same four quarters, public investment in the state, measured in chain volume terms, was 17.8% higher than a year earlier, the largest rise of Australia’s eight jurisdictions and the highest four-quarter total in its own series. The figures come from the ABS Building Activity, Australia for the June quarter 2026, released on 7 October 2026 (ABS Building Activity), and from the ABS national accounts for the same quarter, released on 2 September 2026 (ABS National Accounts).
This output reads both releases for one state. It asks what the June quarter shows about construction in South Australia, homes and public works together, and what the data can and cannot say about how the two relate. Every comparison with other jurisdictions uses the same ABS series and the same calculation for all eight. Australian Property Network (APN) certifies two readings for South Australia that bear on the question: Public Investment Intensity (21810), which reads public investment against the size of the state economy, and State Completion Lag (21840), which reads how long the dwellings under construction would take to finish at the recent pace of completions. Both compare the state with its own history. The national readings, Construction Completion Lag (21290) and Building Approvals & Commencements (21510), give the national setting.
Public Investment at a High Share of the State Economy
Public investment is spending on fixed assets by governments and the businesses they own, such as roads, hospitals, schools, water and energy works and equipment. In the four quarters to June 2026 it came to $11,595 million in South Australia in current prices, 20.8% more than in the previous four quarters, and 6.13% of state final demand, the total spending of households, businesses and governments within the state. The share was 5.43% a year earlier and averaged 4.85% from 2011 to 2025. Public Investment Intensity (21810) reads +1.7925σ for South Australia at the June quarter, the highest of the eight jurisdictions’ readings, each against its own history, and ranks 82.3, against 165 quarters back to 1985.
South Australia: Public Investment as a Share of State Final Demand, Four Quarters to June 1985 to June 2026
APN calculation based on Australian Bureau of Statistics data: Australian National Accounts: National Income, Expenditure and Product, June quarter 2026, Table 29 (A2300980C, A2300982J). Public gross fixed capital formation (general government and public corporations, all levels of government) summed over four quarters, divided by state final demand summed over the same quarters; current prices, seasonally adjusted. The dotted line is the 2011 to 2025 average of 4.85%. Investment is recorded net of sales of existing assets; the fall below zero in 2000 reflects negative investment by state and local public corporations in the March and September quarters of that year.
The share is the highest since the four quarters to March 2018, but it is not a record. It was higher through most of 1985 to 1991, around 2009 and 2010, and in 2017 and 2018. The fall below zero in 2000 is an accounting effect: the national accounts record investment net of sales of existing assets, and investment by state and local public corporations in South Australia was negative in the March and September quarters of 2000, by $2,645 million and $890 million. The four-quarter total of public investment is a record in both current prices and chain volume terms, because the state economy has grown: the share measures public investment against that growth.
Real Public Investment, Four Quarters to June 2026 Against the Previous Four Quarters
APN calculation based on Australian Bureau of Statistics data: Australian National Accounts: National Income, Expenditure and Product, June quarter 2026, Tables 26 to 33. Public gross fixed capital formation, chain volume measures, seasonally adjusted, summed over the four quarters to June 2026 and compared with the four quarters to June 2025. Gold bars are increases and slate bars are decreases.
Measured in chain volume terms, which remove price change, public investment in South Australia rose 17.8% over the four quarters, against between −22.4% and 3.1% in the other seven jurisdictions. It fell in four of the eight. On this measure South Australia’s rise was the largest of the eight, by a wide margin.
Who Invested
The national accounts divide public investment into four sectors: general government (the Commonwealth, and state and local governments) and public corporations (government-owned businesses, Commonwealth and state and local). Of the $1,998 million increase in South Australia over the four quarters, $1,286 million, about 64%, was general government investment by state and local governments, which reached a record four-quarter total. Public corporations added $797 million between them, and Commonwealth general government investment was $85 million lower.
| Sector | Four quarters to June 2025, $m | Four quarters to June 2026, $m | Change, $m | Change |
|---|---|---|---|---|
| General government, state and local | 5,371 | 6,657 | +1,286 | +23.9% |
| General government, Commonwealth | 2,315 | 2,230 | −85 | −3.7% |
| Public corporations, state and local | 1,228 | 1,616 | +388 | +31.6% |
| Public corporations, Commonwealth | 683 | 1,092 | +409 | +59.9% |
| Public investment, total | 9,597 | 11,595 | +1,998 | +20.8% |
APN calculation based on Australian Bureau of Statistics data: Australian National Accounts: National Income, Expenditure and Product, June quarter 2026, Table 29 (A2300978T, A2300977R, A2301221J, A2301220F, A2300980C). Public gross fixed capital formation in South Australia by sector, current prices, seasonally adjusted, summed over four quarters. The ABS rounds each quarter to $1 million.
Investment by Commonwealth public corporations in South Australia was $403 million in the June quarter of 2026, the largest quarter in the series, against $184 million a year earlier. It is the smallest of the four sectors over the year. The sector series identify who invested, not what was built, so the projects behind any of these figures are NIL RETURN.
A Record Dwelling Pipeline
Dwelling commencements in South Australia have risen from 11,097 in the four quarters to September 2024. The 15,401 dwellings begun in the four quarters to June 2026 were 16.5% more than a year earlier and above the previous peak of 15,053, in the four quarters to December 2021. Completions over the four quarters were 13,647, 6.0% more than a year earlier and second only to the 14,142 in the four quarters to March 2026.
South Australia: Dwellings Commenced and Completed over Four Quarters, June 2012 to June 2026
APN calculation based on Australian Bureau of Statistics data: Building Activity, Australia, June quarter 2026, Tables 34 and 38 (A83802016A, A83802017C). Dwelling units commenced and completed, all sectors, new and other work, original, summed over the four quarters ending in each quarter shown.
The June quarter alone shows completions falling, and the four quarters show them rising. South Australia completed 3,345 dwellings in the June quarter of 2026 against 3,840 in the June quarter of 2025, a fall of 12.9%. The June quarter of 2025 was the largest single quarter of completions in the state since December 2018, so the comparison of single quarters starts from an unusually high base. Over four quarters the comparison is not affected by one large quarter.
With commencements running ahead of completions, the number of dwellings under construction rose in each of the last four quarters, to 15,880 at the end of June, 12.2% more than a year earlier and the highest since the series began in 1984.
South Australia: Dwellings Under Construction, September Quarter 2016 to June Quarter 2026
APN chart based on Australian Bureau of Statistics data: Building Activity, Australia, June quarter 2026, Table 77 (A83802018F). Dwelling units under construction at the end of each quarter, all sectors, original. The latest quarter is shown in gold.
Private investment in dwellings in South Australia, the value of new homes and alterations in chain volume terms from the national accounts, was 5.1% higher over the four quarters to June 2026 than a year earlier, although the June quarter was 1.8% below the June quarter of 2025. The value of residential building work yet to be done in the state, the work in hand that builders have still to complete, was $4.02 billion at June 2026, 26.5% more than a year earlier and the highest in the series. That figure is in current prices and is not adjusted for rising building costs.
South Australia Against the Other Jurisdictions
| Jurisdiction | Commenced, four quarters | Completed, four quarters | Under construction, June | Months of pipeline, June 2026 | Change in months over the year |
|---|---|---|---|---|---|
| New South Wales | +10.1% | +16.0% | +3.6% | 19.0 | −2.3 |
| Victoria | +2.9% | −0.2% | +2.2% | 13.5 | +0.3 |
| Queensland | +26.0% | +2.2% | +27.0% | 18.2 | +3.6 |
| South Australia | +16.5% | +6.0% | +12.2% | 14.0 | +0.8 |
| Western Australia | +13.2% | −13.1% | +25.4% | 17.8 | +5.5 |
| Tasmania | +4.8% | −6.0% | +5.3% | 11.8 | +1.3 |
| Northern Territory | +32.9% | +38.4% | +14.7% | 11.7 | −2.4 |
| Australian Capital Territory | +136.7% | −7.7% | +22.1% | 19.8 | +4.8 |
| Australia | +13.4% | +2.8% | +10.8% | 16.5 | +1.2 |
APN calculation based on Australian Bureau of Statistics data: Building Activity, Australia, June quarter 2026, Tables 33, 34, 37, 38, 76 and 77. Original series, all sectors. The first three columns compare the four quarters (or, for dwellings under construction, the end of the quarter) to June 2026 with the same period a year earlier. Months of pipeline is dwellings under construction divided by completions over the latest four quarters, multiplied by 12.
Commencements over the four quarters rose in all eight jurisdictions. South Australia’s rise was the fourth largest, behind the Australian Capital Territory, where commencements more than doubled from the lowest four-quarter total since 2006, the Northern Territory and Queensland. South Australia is the only jurisdiction where four-quarter commencements are at a record. Dwellings under construction are at records in South Australia, Queensland and Western Australia, and nationally.
Months of pipeline divides the dwellings under construction by the recent pace of completions, to show how long the stock would take to finish if nothing new began. South Australia’s was 14.0 months at June 2026, up from 13.2 a year earlier, below the national 16.5 months on the same calculation and fifth longest of the eight. The level depends partly on the mix of dwellings, because apartments take longer to build than houses, so the change over the year is the steadier comparison. State Completion Lag (21840) reads that change against each jurisdiction’s own history: South Australia reads +0.2062σ, close to its usual range, ranking 67.5 against 161 quarters. The largest lengthening was in Western Australia, the Australian Capital Territory and Queensland. Nationally, Construction Completion Lag (21290) reads +2.0205σ, on the June quarter’s completions and a seasonal baseline.
What the Data Cannot Separate
Public investment and dwelling construction rose together in South Australia over the year. Both draw on the same builders, trades and materials, but the data here do not show one affecting the other: completions over four quarters rose, and the state’s completion lag lengthened less than the national figure. The coincidence of the two is reported; a relationship between them is not tested.
Building Activity counts buildings, residential and non-residential. Roads, rail, water, energy and other engineering works are counted separately by the ABS, so this release cannot show where the public investment in the national accounts was spent. The rise in dwellings under construction can reflect more commencements, slower completions, or both; the counts alone do not separate them, which is why the completion lag is read alongside them.
Not Tested
The projects behind the public investment figures, and the split of public investment between building, engineering works and equipment, are NIL RETURN. Dwelling prices and rents in South Australia are outside the scope of this output, as is population: the June quarter population estimates are due on 17 December 2026. The state’s real final demand per person since 2019, the largest rise of the eight jurisdictions to March 2026, is set out in State Final Demand, June Quarter 2026. APN makes no forecast of construction in South Australia.
APN Analytical Synthesis
The weight of the evidence supports the interpretation that construction in South Australia was at a high level across both public works and housing in the year to June 2026. Dwellings begun over four quarters and dwellings under construction are at records, and public investment rose more than in any other jurisdiction, to 6.13% of state final demand, the highest share since 2018, with state and local governments accounting for about 64% of the increase. The fall in June quarter completions is a single-quarter comparison against an unusually large quarter; completions over four quarters rose 6.0%. Current conditions are structurally consistent with a dwelling pipeline that is growing because more homes are being started, while the time taken to complete them has lengthened only modestly against the state’s own history, as State Completion Lag (21840) at +0.2062σ shows. Nationally, Construction Completion Lag (21290) stands above its baseline at +2.0205σ and Building Approvals & Commencements (21510) at +0.4936σ.
The data cannot separate the effect of public works on house building from the two rising at the same time, and the sector series do not identify the projects. This output speaks only to the structural conditions the cited data can independently support; it does not constitute a view on future construction, prices or government policy, and no such view is expressed or implied. The next data points are the ABS national accounts for the September quarter of 2026, due on 2 December 2026, and the ABS Building Activity for the September quarter, due in January 2027.
- Australian Bureau of Statistics (Reference period: June 2026) ‘Tables 26 to 33. State Final Demand, Detailed Components’ [data set], Australian National Accounts: National Income, Expenditure and Product [https://www.abs.gov.au/statistics/economy/national-accounts/australian-national-accounts-national-income-expenditure-and-product/jun-2026], accessed 4 October 2026.
- Australian Bureau of Statistics (Reference period: June 2026) ‘Tables 33, 34, 37, 38, 50, 76 and 77’ [data set], Building Activity, Australia [https://www.abs.gov.au/statistics/industry/building-and-construction/building-activity-australia/jun-2026], accessed 7 October 2026.
- Australian Bureau of Statistics (Reference period: June 2026) Australian National Accounts: National Income, Expenditure and Product [https://www.abs.gov.au/statistics/economy/national-accounts/australian-national-accounts-national-income-expenditure-and-product/jun-2026], ABS Website, accessed 4 October 2026.
- Australian Bureau of Statistics (Reference period: June 2026) Building Activity, Australia [https://www.abs.gov.au/statistics/industry/building-and-construction/building-activity-australia/jun-2026], ABS Website, accessed 7 October 2026.
ABS material is used under a Creative Commons Attribution 4.0 International licence. Calculations, standardisations and index readings are APN’s and are not attributable to the ABS.
Disclaimer
The analysis and information contained in this publication are for general informational and strategic purposes only and do not constitute financial, investment, legal, or any other form of professional advice. Australian Property Network is not a licensed financial advisor. Property values and market conditions can go up or down. Before making any property or investment decisions, you must conduct your own thorough research and seek independent professional advice tailored to your specific circumstances.
Findings are presented on the basis of data and evidence alone.
