Owner-Builders & Regulations questions

The National Construction Code (NCC) sets the minimum building standards across Australia to ensure safety, accessibility, energy efficiency, and overall amenity.

What is the NCC?

The National Construction Code (NCC) is a uniform set of technical provisions for the design and construction of buildings throughout Australia. It applies to all new building work and major renovations, and is legally enforceable in every state and territory. The NCC is developed and maintained by the Australian Building Codes Board (ABCB) and is made up of three volumes:

• Volume One: Covers commercial buildings (Class 2 to 9), including apartments, offices, schools, and shops.
• Volume Two: Covers residential buildings (Class 1 and 10), such as houses, sheds, and carports.
• Volume Three: Covers plumbing and drainage requirements.

Why does it matter when building a home?

If you're building or renovating a home, the NCC ensures your project meets essential standards for:

• Structural safety: Foundations, framing, and materials must meet performance requirements.
• Fire safety: Includes fire separation, smoke alarms, and egress routes.
• Health and amenity: Ventilation, natural light, waterproofing, and sanitation.
• Accessibility: Requirements for ramps, door widths, and circulation spaces, especially in multi-unit housing.
• Energy efficiency: Thermal performance, insulation, glazing, and compliance with BASIX (in NSW) or NatHERS ratings.

Your builder, designer, and certifier must ensure your plans and construction comply with the NCC. Non-compliance can lead to delays, fines, or refusal of occupancy certificates.

Where to find the NCC

You can access the full NCC for free via the Australian Building Codes Board website. Builders, designers, and certifiers should always refer to the latest version to ensure compliance.

Bottom line: The NCC is the national rulebook for building standards. Whether you're constructing a new home or renovating, your project must meet the NCC’s requirements for safety, energy, and accessibility.

Owner-building is subject to local eligibility, project and approval rules. Depending on the jurisdiction, these can concern ownership, intended occupation, training, construction induction and previous projects. The ACT uses an owner-builder licence. Check the requirements for the actual work and property with your regulator. If a builder offers to do the whole project but asks you to become the owner-builder, obtain independent advice before agreeing.

Official sources:

• QBCC About owner-building
• BPC Certificate of consent
• SAFA Owner builders
• ACT Construction licences

General information only. Requirements vary by state or territory and change over time, so check the current rules for your location.

If you engage an appropriately licensed or registered builder to take responsibility for the building work, you do not usually need a builder's licence yourself. Managing or carrying out the project as an owner-builder is a different arrangement. Check the authorisation and eligibility rules for your location before committing. An owner-builder authority does not authorise specialist work outside its scope, such as regulated electrical or plumbing work.

Official sources:

• NSW Working as an owner-builder
• BPC What is an owner-builder
• ACT Construction licences

General information only. Requirements vary by state or territory and change over time, so check the current rules for your location.

Whether you can do a task yourself depends on the work, its value, the approvals and local licensing rules. An owner-builder authority does not replace a required trade licence. Check electrical, plumbing, gas, drainage, refrigeration, asbestos and other regulated work with the relevant authority. If you have engaged a builder, agree any work you will do yourself in writing, including access, safety, cost and responsibility for defects.

Official sources:

• NSW Working as an owner-builder
• WA Owner-builder approval
• SAFA Owner builders

General information only. Requirements vary by state or territory and change over time, so check the current rules for your location.

NatHERS is the national house energy rating scheme. According to NatHERS, states and territories use its ratings as the most common way to show a new home meets the National Construction Code energy efficiency requirements, and a NatHERS assessor uses accredited software, your plans and the local climate zone to produce the rating. BASIX is a NSW scheme that sets sustainability targets for water and energy and minimum thermal comfort for residential development, with a certificate produced using an online tool. Each state adopts the National Construction Code on its own timetable, so the requirement that applies to you depends on your state and your approval date.

In MyBuildHub: record the assessor, the rating or certificate number and the energy report in your project documents, and make sure the design you build matches it.

Check yourself: NatHERS, BASIX, ABCB state and territory adoption.

General information only. It is not legal advice and may not apply to your project. Rules differ by state and change over time, so confirm with your regulator, certifier or a lawyer before acting.

In Australia, building compliance is checked by an accredited certifier or building surveyor. Their role is to ensure your project meets all legal and technical requirements under the National Construction Code (NCC), relevant Australian Standards, and local planning rules. They inspect key stages of construction and issue the final Occupation Certificate, which confirms your home is safe, compliant, and ready to be lived in.

What does a certifier do?

• Reviews your plans before construction starts to ensure they meet building regulations and approvals.

• Issues the Construction Certificate (or Building Permit), which allows work to begin.

• Conducts mandatory inspections at key stages, such as foundations, framing, waterproofing, and final fit-out.

• Checks compliance with structural safety, fire protection, energy efficiency, and accessibility standards.

• Issues the Occupation Certificate once the build is complete and compliant.

Independence matters

To maintain integrity and avoid conflicts of interest:

• The certifier must not be related to the builder or developer.

• They are generally appointed by the owner (in some states the builder cannot appoint them on your behalf) and must hold current registration or accreditation under state or territory legislation, e.g. NSW’s Building and Development Certifiers Act.

• Certifiers are subject to strict professional conduct rules and can face penalties for misconduct or negligence.

Why it’s important

• Ensures your home is built to legal and safety standards

• Protects you from future liability or insurance issues

• Required for final approval and occupancy

• Helps avoid costly mistakes or non-compliant work

Bottom line: An accredited certifier or building surveyor is your compliance watchdog. They’re independent professionals who inspect your build, verify it meets all regulations, and issue the final certificate that allows you to move in. Choosing a qualified, impartial certifier is essential for a safe and legally approved home.