The National Construction Code (NCC) sets the minimum construction standards that homes must meet across Australia. These standards affect how safe, comfortable and durable your home is, whether building work can be approved and buildings legally used or occupied.
As a homeowner, you are not expected to read or interpret the technical requirements of the NCC. However, understanding when the NCC applies and what it means for your build or renovation can help you make informed decisions and avoid problems later.
Why NCC compliance matters
Compliant work supports safety, comfort, energy efficiency and legal occupancy. Non-compliant work can result in delays, costly rectification, insurance issues or problems selling your home.
If you are buying an existing home
Existing homes were built to meet the NCC requirements that applied at the time they were built. They do not need to meet current NCC standards unless new building work is done.
If you are building or renovating
The NCC applies whenever building approval is needed. This includes new homes, extensions, major renovations, garage conversions and secondary dwellings. NCC requirements generally don’t apply to minor cosmetic work. If you are not sure, check with your local council.
Any new work to an existing home, such as an extension or significant renovations, must comply with the NCC edition that applies at the time the work is approved. This ensures that any new additions or modifications meet applicable safety, health, and sustainability standards.
Your builder, designer, architect, or building certifier is responsible for making sure work complies with the NCC and state or territory building laws. Compliance is checked through building approvals, inspections during construction and final certification.
You don’t need to have detailed knowledge of the NCC - your building professionals will manage the technical requirements. But knowing what the NCC is and when it applies can help you make informed decisions.
Understand who does what in construction projects
Knowing who is responsible for building compliance is useful when working through the design, approval and construction process for your project.
The ABCB does not approve building projects. The ABCB's role is to develop and maintain the NCC. We do not assess, certify or approve individual building applications.
Your builder, designer or building certifier is responsible for ensuring compliance. Your role is to engage qualified professionals and ensure approvals are in place.
Learn more about who is responsible for compliance and approvals.
Check planning and building requirements early
Council planning rules and the NCC address different requirements. Most projects must meet both before construction can begin.
Ask the right questions
Early discussions with your builder or designer can clarify approval needs, compliance pathways and product certification requirements.
Using the NCC as a homeowner
Anyone can access the NCC for free through NCC Online. It is a technical document and should not replace professional advice.
Where to get help
If you’re not sure who to contact, the getting help with the National Construction Code page explains where to start.
More information
Our frequently asked questions for homeowners have quick answers for common questions.
You may also find the following information helpful:
For answers to broader topics, browse our general frequently asked questions pages covering broader topics, including the NCC, the ABCB, Australian Standards, and the CodeMark and WaterMark certification schemes.