How building control works nationally

Australia has no single national building approvals system. The Australian Building Codes Board (ABCB) publishes the National Construction Code, which sets the minimum technical requirements for safety, health, amenity, accessibility and sustainability. Volumes One and Two are what the industry calls the Building Code of Australia (BCA); Volume Three is the Plumbing Code. Each state and territory then gives the NCC legal force through its own legislation, adds its own variations, and decides who approves building work, how, and with what documents.

That split is why a developer or builder moving between states finds the same technical code but different paperwork, timeframes, professional titles and regulators. National reform has focused on making the systems more consistent since the 2018 Building Confidence report by Peter Shergold and Bronwyn Weir, which recommended stronger registration of building practitioners and better oversight of certification across all jurisdictions.

State-by-state comparison

Summary for orientation only. Each jurisdiction has exceptions by building class and project size, and regulators and terminology change with reform. Confirm current requirements with the relevant regulator before relying on them.

Same job, different words: a terminology guide

Most confusion between states is vocabulary. This table translates the common terms between the three largest markets.

How the NSW system works

NSW has the most distinctive system in Australia, because it separates planning and building approval and offers a combined fast-track route.

Three pathways

• Exempt development: minor work needing no approval if every standard in the Codes SEPP is met. See do I need council approval?
• Complying development: a single Complying Development Certificate, issued by a registered certifier or council within a statutory period of 10 days, or 20 where neighbour notice is required, for projects meeting every standard in a State code. See how to apply for a CDC.
• Development application: a merit assessment by council or a planning panel, followed by a Construction Certificate. See DA consultant Sydney.

The Principal Certifier

Before building work starts, the owner (or another person with the benefit of the approval) appoints a Principal Certifier, who carries out mandatory critical stage inspections and issues the Occupation Certificate. Our guides cover the appointment and getting the OC.

Regulation of certifiers

Certifiers are registered under the Building and Development Certifiers Act 2018 and regulated by Building Commission NSW, which also oversees building practitioners and administers the compliance powers for residential apartment buildings. Each certifier’s registration limits the work they can certify.

What is changing

The Building (Approvals and Practitioners) Act 2026 received assent on 14 August 2026 and will commence on a day or days to be appointed by proclamation. It will replace the current certifier and practitioner Acts, rename Construction Certificates as building approvals and Occupation Certificates as completion approvals, and define who can issue them as the approval authority: the council, a person registered to issue the approval, or the Planning Minister for development the Minister approved. No commencement proclamation had been made as at 6 November 2026. See Construction Certificates are being replaced.

Victoria and Queensland at a glance

Victoria

In Victoria, the owner appoints a relevant building surveyor, private or municipal, who issues the building permit, carries out mandatory inspections and issues an occupancy permit or certificate of final inspection at the end. Planning permits, where needed, come from council under separate planning legislation. Practitioners are regulated by the Building and Plumbing Commission, which absorbed the Victorian Building Authority on 1 July 2025. Victoria adopted NCC 2025 from 1 May 2026 for projects whose design starts after that date.

Queensland

In Queensland, licensed building certifiers, private or council, assess building work against the Building Act and the NCC and issue a building development approval. At completion they issue a certificate of occupancy (which replaced the certificate of classification in 2020) for class 1b to 9 buildings, or a final inspection certificate for houses (class 1a) and class 10 outbuildings. Certifiers are licensed by the Queensland Building and Construction Commission. Queensland has deferred mandatory NCC 2025 to 1 May 2027.

WA, SA, Tasmania, the ACT and the NT

• Western Australia: local government is usually the permit authority. A registered building surveyor, often private, issues a certificate of design compliance; the permit authority then issues the building permit. Occupancy permits apply to class 2 to 9 buildings; class 1 and 10 buildings do not need one. The regulator is Building and Energy, part of the Department of Local Government, Industry Regulation and Safety.
• South Australia: development approval combines planning consent and building consent. Accredited professionals can grant building consent within their accreditation level under the Planning, Development and Infrastructure Act 2016, accredited by the Accreditation Authority under the Accredited Professionals Scheme.
• Tasmania: building work is categorised by risk under the Building Act 2016. Low-risk work needs no permit; notifiable work needs a building surveyor’s certificate of likely compliance; permit work also needs a building permit from the council.
• ACT: the landowner appoints a licensed building certifier, who issues the building approval. At the end, the certifier certifies that the work is complete and the Construction Occupations Registrar issues the certificate of occupancy.
• Northern Territory: most building work requires a registered private building certifier, who issues the building permit and, at the end, the occupancy permit or certificate of substantial compliance. The Building Practitioners Board keeps the register, and the Director of Building Control has oversight functions.

NCC 2025: who has adopted it and when

The ABCB published NCC 2025 on 1 May 2026. Each jurisdiction decides when it applies.

Sources: NSW Government (25 March 2026) and the published positions of each state and territory regulator, checked 6 November 2026. Transitional arrangements differ between jurisdictions; confirm with your certifier or building surveyor.

For NSW projects, the edition that applies is the one in force on the day the CDC or Construction Certificate application is made, subject to NSW transitional provisions. Our BCA consultant guide explains what to check for designs that will be approved close to 1 May 2027.

Building in NSW from interstate: what to know

Developers, builders and owners who know another state’s system often trip over the same NSW differences.

1. Check whether a CDC is available

   NSW’s complying development pathway has no exact equivalent in most states. If your project fits a code, it can avoid a council DA entirely. Start with our CDC vs DA guide.

2. Separate planning and building approval

   On the DA pathway, development consent and the Construction Certificate are separate approvals, and conditions of consent must be satisfied before the CC.

3. Appoint the Principal Certifier before building work starts

   Building work is not authorised until the Principal Certifier is appointed, and the council must have at least 2 days’ notice before it starts. A builder cannot make the appointment unless the builder owns the land.

4. Check the certifier’s NSW registration

   Each certifier’s registration limits what they can certify. If a practitioner is registered in another state, check whether that registration is recognised in NSW under automatic mutual recognition before engaging them. Fire safety registration and accreditation classes are currently exempt from it, until 1 October 2027.

5. Use NSW-specific inputs

   BASIX for residential energy and water, NSW variations to the NCC, the section 10.7 planning certificate, and, for apartment buildings, the NSW design and building practitioner requirements.

6. Plan for the fire safety cycle

   Buildings with fire safety measures need a fire safety certificate before the Occupation Certificate and annual fire safety statements afterwards. See our fire safety guide.

7. Budget time for the reforms

   Watch NCC 2025 adoption on 1 May 2027 and the commencement of the Building (Approvals and Practitioners) Act 2026.

Choosing a certifier or building surveyor anywhere in Australia

• Registered or licensed in the state where the work is, for the class of building.
• Appointed by the owner, not chosen and paid by the builder in a way that creates a conflict.
• Clear written scope: the approval, the inspections by stage, and the completion document.
• Inspections in person at every mandatory stage.
• Local knowledge of the state’s planning instruments and council practice.
• Connected expertise for BCA, fire safety, access and planning where the project needs it.
• A quality system so the process is consistent from project to project.

Common cross-border mistakes

Assuming the paperwork is the same as at home

A Victorian building permit mindset applied in NSW misses the DA-then-CC sequence or the CDC option.

Using the wrong NCC edition

Victoria is on NCC 2025; NSW is on NCC 2022 until 1 May 2027. A design that complies in Melbourne may not match NSW requirements, and vice versa.

Ignoring state variations

Every jurisdiction modifies the NCC; NSW also has BASIX instead of some national energy provisions for housing.

Engaging a practitioner not registered for the state

Registration and mutual recognition must be checked first.

Starting work before the appointment

In NSW, building work is not authorised until the Principal Certifier is appointed, and failing to give the required notice is itself an offence.

How Built Smart Solutions helps

Built Smart Solutions is a Sydney-based building certification and construction regulation firm, ISO 9001 certified, with more than 20 years in certification and regulatory policy, including private development and Crown building work. We work on projects across Sydney and regional NSW, for local owners and for builders and developers coming into NSW from other states.

On any one project, Built Smart Solutions acts as your certifier or as your consultant or planner, not both, so the certification stays independent.

Final verdict

Building certification in Australia shares one technical code but runs on eight different systems. The differences that matter most are who issues the approval, what the documents are called, which edition of the NCC applies and how the regulator oversees practitioners. NSW stands out for its separate planning and building approvals, its complying development fast track and its Principal Certifier model, and it is in the middle of major reform.

If you are building in NSW, whether you are a Sydney homeowner or an interstate developer, Built Smart Solutions can guide the project from pathway to Occupation Certificate. See our certification services, get in touch or call (02) 9127 8249.

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