Construction Work Done, Australia, Preliminary

The value of total construction work done fell 0.7% to $79,278.2m in the September quarter, in seasonally adjusted terms. Engineering work fell 5.8% in the September quarter and is 1.2% lower than the same time last year. Building work done rose 4.0% in the September quarter and is 6.5% higher than the same time last year.

The trend estimate for total construction work done rose 0.7% in the September quarter.

The value of building work rose 4.0% in the September quarter, in seasonally adjusted terms. Non-residential building increased by 3.7% and residential building increased by 4.2% in the September quarter. Non-residential building work done is 3.5% higher than at the same time last year. Residential building work done is 8.5% higher than at the same time last year.

The trend estimate for total building work done rose 2.0% in the September quarter.

Total construction work done rose in New South Wales, Victoria, Queensland, and South Australia. Total construction work done fell in all other states and territories.

This publication provides an early indication of trends in building and engineering construction activity. The data are preliminary estimates with a response rate of approximately 80% of surveyed construction entities during the quarter. These estimates are subject to revision when results are updated in Engineering Construction Activity, Australia on 21 January 2026 and in Building Activity, Australia on 21 January 2026.

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This release previously used catalogue number 8755.0.

A new base year, 2023-24, has been introduced in the chain volume estimates resulting in revisions to growth rates in subsequent periods. In addition, the chain volume estimates have been re-referenced to 2023-24, preserving additivity in the quarters after the reference year. Re-referencing affects the levels of, but not the movements in, chain volume estimates. For further information, see the methodology.

The annual review of seasonal factors has been completed with no significant changes made to the seasonal adjustment of Building Activity. Engineering Construction Activity reinstated the seasonally adjusted series of engineering work done in Northern Territory from December quarter 2020. Further information can be found in the linked methodology.

The Building Activity survey contains an indirect, modelled component for jobs with low approval values. Jobs are selected to be modelled based on the following upper thresholds:

• less than $65,000 for alterations and additions to residential, and new other residential.
• less than $75,000 for new houses.
• less than $325,000 for non-residential building.

The factors used in Building Activity modelling have been updated this quarter to better reflect construction cost changes. The updated factors caused a slight change to the June 2025 Building Activity estimates, however this had minimal impact to the final Building Activity revision since first published in Construction Work Done, June 2025. Revisions to the June 2025 Building Activity estimates includes changes from the model factor update and standard sources of revisions, such as imputes changing to response and changes to responses. For more information on revisions and modelling, refer to the methodology.