One code, eight timelines. Here is the verified adoption map for every state and territory as at July 2026, what actually changed for residential work, and where the cost lands.
Last updated: 24 July 2026
If you build in more than one state, the National Construction Code is no longer a single set of rules with a single start date. NCC 2025 was published on 1 May 2026, but whether it applies to your job, and from when, depends entirely on where the job is. Right now the country is split. Victoria is fully in. The ACT is in but not mandatory until 2027. New South Wales, Queensland, Western Australia and South Australia are effectively still on NCC 2022 for building work. Tasmania paused it by legislation. The Northern Territory has opted out altogether.
That fragmentation is the whole story for builders this year. Miss which edition applies to a given job and you can price it wrong, specify it wrong, or lodge it wrong. Here is the map. Every date below was verified at the source in July 2026. Confirm your specific project with your certifier before you lodge, because transitional carve-outs turn on the detail of your individual approval.
The Adoption Map: Every State and Territory
Read this as your first check on any new job. The edition in the second column is what applies to a standard new residential project lodged today. The fourth column is where the traps sit.
| State / Territory | What applies now | Mandatory date | What builders should know |
|---|---|---|---|
| Victoria | NCC 2025 in force | 1 May 2026 (in force) | No state transition period. Projects with design substantially commenced before 1 May 2026 may stay on NCC 2022 if the certifier agrees. Lead-free plumbing mandatory from 1 May 2026 with no transition. |
| ACT | NCC 2025 available; either edition permitted | 1 May 2027 | Twelve-month choice window. Mandatory 1 May 2027. Separately, a project with a DA or works approval lodged before 1 November 2026 can keep seeking building approval under either edition after that date, until the application expires. |
| New South Wales | NCC 2022 | 1 May 2027 | Voluntary early adoption available from 1 May 2026. State variations planned, including apartment common-area energy and remedial waterproofing flexibility. |
| Queensland | NCC 2022 | 1 May 2027 | Voluntary early adoption available from 1 May 2026. NCC 2022 applies to all building and plumbing work until 30 April 2027. |
| Western Australia | NCC 2022 (in practice) | Effectively 1 May 2027 | WA adopted the code as BCA 2025 on 1 May 2026, but permit applications are assessed against the edition in force twelve months earlier. Most applications run under NCC 2022 until 1 May 2027. |
| South Australia | Plumbing Code 2025 + NCC 2022 building | 1 May 2027 (building) | Only Volume Three, the Plumbing Code, was adopted on 1 May 2026. The Building Code is deferred to 1 May 2027. NCC 2022 Amendment 2 remains the building standard until 30 April 2027. |
| Tasmania | NCC 2022 | Paused to 1 May 2027 | NCC 2025 applied by default from 1 May 2026, then the Building Amendment Bill 2026 passed Parliament and reverted the state to NCC 2022 from 5 June 2026. The pause is legislated; NCC 2025 adoption is set for 1 May 2027. |
| Northern Territory | NCC 2022 Amendment 2 | Not adopted | The NT initially confirmed adoption then reversed it. NCC 2022 Amendment 2 continues until the next edition of the code is published. No future adoption date is set. |
Correct as at 22 July 2026. Sources: ABCB, and the building authority in each jurisdiction. Transitional protections turn on your individual approval. Confirm with your certifier before lodging.
What Actually Changed for Residential Builders
Here is the part that gets lost in the noise. NCC 2025 is, at its core, a commercial and multi-residential update. The big residential shifts that everyone still talks about, seven-star NatHERS energy ratings and the Livable Housing Design provisions, did not arrive in this edition. They landed back in NCC 2022. If your standard detached specification already meets those, NCC 2025 does not rewrite your house.
What NCC 2025 does bring, and what can touch residential work depending on class and climate zone, falls into a handful of areas:
- Waterproofing. Tightened provisions for the most expensive failure points, including balconies, podiums and carparks in Class 2 apartment buildings, with new deemed-to-satisfy options for concrete balconies.
- Condensation management. New requirements for external walls using drained and ventilated cavities. This bites hardest in the cooler and wetter climate zones, so southern and elevated sites feel it more than the north.
- Commercial energy efficiency and on-site solar. Mandatory on-site solar photovoltaic requirements for Class 3 and Class 5 to 9 buildings in jurisdictions that have adopted the code. Residential builders doing work that crosses into commercial classification should check their project class carefully.
- Carpark fire safety. New provisions for commercial and apartment buildings.
For a builder doing standalone Class 1 homes, the practical footprint is condensation management and waterproofing. For anyone touching apartments or mixed-use, the list is longer and the cost is real.
What It Costs You
The honest answer is that it depends on what you build and where. The most widely cited residential figure comes from Master Builders ACT, which has estimated the changes could add somewhere between fourteen thousand and fifty-five thousand dollars to a typical new home in the territory. That is a wide band, and it reflects how much the impact varies by design, class and climate zone.
The point for quoting is not the headline number. It is the timing. In a jurisdiction on a transition, two identical homes lodged a week apart either side of a changeover can carry different compliance costs. If you quote a job under one edition and it is built under another, that gap comes out of your margin unless your contract shares the risk. It is the same discipline that runs through licensing and compliance for builders: get the version right at lodgement, and price to it.
The Cross-Border Problem
This is where builders get caught. Picture a Victorian builder with a job in Melbourne about to start, and two jobs in regional New South Wales for a client relationship built over years. The Victorian job is under NCC 2025. The New South Wales jobs stay under NCC 2022 until May 2027. Two certifiers, two editions, one business trying to run one set of standard details across both.
The fix is boring and it works. Separate your standard specification by edition, not by habit. One spec for the jurisdictions on NCC 2025, one for the jurisdictions still on NCC 2022, and a note on every job that records which edition was nominated at lodgement. The waterproofing, condensation and energy provisions are exactly the clauses where a cross-border slip shows up later as a defect or a failed inspection.
THE GOOD BUILDER TAKE
The code is national. Its start date is not. For the next twelve months, the single most useful habit is to nominate the operative edition at the moment you lodge, in writing, and lock your specification to it. A job quoted under one edition and built under another is where the margin disappears.
If you work across a border, treat NSW, Queensland, WA, SA, Tasmania and the NT as one column and Victoria and the ACT-bound-for-2027 as another. Do not let a Victorian detail drift onto an interstate job, and do not carry an interstate assumption into a Victorian one. Your certifier confirms the edition. Your paperwork proves which one you priced.
Frequently asked questions
It depends on your state and when your building approval is lodged. The operative edition is set at the time of your approval, not when you finish. In New South Wales, Queensland, WA, SA, Tasmania and the NT, standard building work is still under NCC 2022 through the transition. In Victoria it is NCC 2025. Confirm with your certifier before lodging.
1 May 2027. NCC 2022 applies to all building and plumbing work in Queensland until 30 April 2027. Builders can adopt NCC 2025 early on a voluntary basis from 1 May 2026 if they choose.
1 May 2027. NCC 2025 has been available since 1 May 2026, with a twelve-month window during which builders may comply with either edition. Separately, projects that formally lodge a DA or works approval before 1 November 2026 can keep seeking building approval under either edition after 1 May 2027, until that application expires.
No. NCC 2025 briefly applied by default from 1 May 2026, but the Building Amendment Bill 2026 passed the Tasmanian Parliament and reverted the state to NCC 2022 from 5 June 2026. Tasmanian building work is under NCC 2022, with NCC 2025 set for 1 May 2027.
The NT initially confirmed adoption of NCC 2025 from 1 May 2026, then reversed the decision. NCC 2022 Amendment 2 continues until the next edition of the code is published. No adoption date for NCC 2025 has been set.
No. The seven-star NatHERS energy standard and the Livable Housing Design provisions arrived in NCC 2022, not NCC 2025. This edition is primarily a commercial and multi-residential update, with targeted residential changes to waterproofing and condensation management.
Related Reading
- The new building code is already in effect: the practical breakdown
- Victoria vs the rest: what the NCC 2025 compliance split means across state lines
- Australian Construction Industry Trends Guide
Want the regulatory changes that hit your business explained without the jargon? Listen to The Good Builder Podcast wherever you get your podcasts.
This article is intended for general information purposes only and does not constitute legal, financial, or professional guidance. Laws, regulations, and industry requirements vary by state and territory and change over time. Builders and trades professionals should seek independent professional guidance relevant to their specific circumstances before making business, legal, or financial decisions.
Author: TGB Editorial
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