Building Approvals vs Commencements and Completions in Australia

Short answer

Building approvals, dwelling commencements and dwelling completions are different stages of Australia's housing pipeline.

• An approval permits building work to begin.
• A commencement records that construction has started.
• Under-construction data count dwellings still being built at the reference date.
• A completion records a dwelling that has reached the ABS completion definition.

One stage does not guarantee the next. Use the Australian property market dashboard to view current supply indicators, then check the source and reference period before comparing figures.

Why these measures are often confused

Housing headlines regularly place an approval figure beside a government supply target or a property-price forecast. That can be useful context, but the measures are not interchangeable.

An approved apartment tower might start months later, change scope or not proceed. A commenced dwelling can remain under construction across several quarters. A completion in the current quarter may have been approved much earlier.

The safest way to read the data is as a pipeline:

1. approval;
2. commencement;
3. work under construction;
4. completion.

Administrative and survey timing, revisions and project delays can create gaps between the stages.

What a building approval measures

The ABS Building Approvals release is compiled from local government and other approving authorities. It covers approved building work, including new buildings and alterations or additions.

For dwelling counts, the headline series reports the number of dwelling units approved. The release splits private sector houses from private sector dwellings excluding houses and publishes state and territory detail.

A building approval is useful for monitoring proposed activity. It does not show:

• that finance has been secured;
• that a builder has started work;
• the expected completion date;
• whether the project will be changed;
• whether the dwelling will be sold, rented or owner occupied; or
• the final construction cost.

The June 2026 dwelling approvals update is a worked example of how the national total, dwelling type and state results can move differently.

What a dwelling commencement measures

The ABS Building Activity survey records dwelling commencements when building work starts. This is a later pipeline stage than approval.

Commencements are published quarterly, while headline building approvals are published monthly. Comparing the latest release from each series therefore requires care because the reference periods will usually differ.

For example, a June monthly approvals result cannot be compared directly with a March-quarter commencements result as if both described the same projects over the same time period.

The March quarter 2026 dwelling starts update explains the latest commencement data and its seasonally adjusted and trend measures.

What under-construction data measure

A dwelling counted as under construction has started but has not yet been completed at the reference date.

The stock of dwellings under construction can rise because more projects start, because projects take longer to finish, or both. A large number under construction is therefore not automatically evidence that completions will rise by the same amount in the next quarter.

Detached houses and multi-unit developments can also have different construction times. State totals may reflect a different mix of dwelling types and project sizes.

What a completion measures

Completions are the closest of these four measures to delivered new housing, but they still do not equal homes available for immediate purchase or rent.

After practical construction is finished, settlement, occupancy approval, fit-out, defect work and marketing can affect when a dwelling is occupied. Some completed dwellings are retained by owners, used as short-stay accommodation or remain vacant.

Completion data also do not measure affordability. The series counts dwellings rather than testing whether their price or rent is accessible to a particular household.

A simple pipeline example

Suppose 100 dwellings receive approval in one month.

In this hypothetical example:

• 85 commence construction;
• 10 remain delayed;
• 5 are cancelled or substantially changed;
• the commenced dwellings finish across several later quarters; and
• some completed homes are sold, some are rented and others remain unoccupied for a period.

The numbers are illustrative, not an Australian conversion rate. They show why 100 approvals should not be reported as 100 newly available homes.

Seasonally adjusted and trend estimates

ABS housing releases often publish original, seasonally adjusted and trend series.

Seasonal adjustment aims to remove recurring calendar patterns. It can leave a series sensitive to unusually large projects or short-term movements.

The trend series smooths some volatility and can be more useful for direction. It is also revised as new data arrive. A trend estimate is not a forecast.

Do not mix a seasonally adjusted percentage for one stage with a trend total for another without labelling both clearly.

Comparing the pipeline with the National Housing Accord

The National Housing Accord aims for 1.2 million well-located homes over five years from 1 July 2024.

That is a delivered-housing objective, not a monthly building approval target. Dividing 1.2 million by 60 gives an arithmetic average of 20,000 homes a month, but comparing one month's approvals with 20,000 can mislead because:

• approvals are not completions;
• delivery will not be even each month;
• projects cross reference periods;
• approvals can expire, change or be cancelled; and
• a completion can relate to an approval from an earlier period.

The arithmetic average can provide scale, but it should not be described as an official monthly approvals target.

What buyers should check for a specific project

National data cannot confirm the position of one house or apartment project.

Before relying on a proposed completion or settlement date, check:

• the planning and building approvals relevant to the project;
• whether construction has started;
• the builder and developer contract position;
• sunset-date and extension clauses;
• finance and valuation conditions;
• progress reporting;
• occupancy or completion certificates; and
• independent legal and building advice.

For a purchase budget, use the Property Purchase Cost Calculator with current quotes and state settings. The result is an estimate, not confirmation that a project will complete or settle on time.

Common mistakes

Treating approvals as completed homes

Approvals measure permission to build, not finished supply.

Comparing different reference periods

Monthly approvals and quarterly commencements may describe different time windows.

Using national data as a local forecast

State, city and dwelling-type mixes can differ materially from the national result.

Treating a trend estimate as a prediction

Trend data smooth historical observations. They do not predict the next release.

Assuming approved value is the final build cost

Approved value is a statistical measure of proposed work. A specific project's contract, site costs, variations and provisional sums determine its actual budget.

Related calculators and guides

• Property Purchase Cost Calculator
• Mortgage Repayment Calculator
• Australian property market dashboard
• June 2026 dwelling approvals update
• March quarter 2026 dwelling starts update
• Building and pest inspection checklist

Sources

• Australian Bureau of Statistics: Building Approvals methodology, reference period June 2026 and checked 31 July 2026.
• Australian Bureau of Statistics: Building Approvals, Australia, June 2026, released 30 July 2026 and checked 31 July 2026.
• Australian Bureau of Statistics: Building Activity, Australia, March 2026, released 8 July 2026 and checked 31 July 2026.
• Australian Government Treasury: Delivering the National Housing Accord, checked 31 July 2026.

General information disclaimer

This guide provides general information only. It is not financial advice, legal advice, a building assessment, a property valuation or a forecast of construction timing, prices or rents. Approval and completion requirements differ by project and jurisdiction. Check the relevant authority and speak with appropriately licensed professionals before relying on a project's status.

Last updated: 31 July 2026.