Building Code

The New Zealand Building Code is contained in Schedule 1 of the Building Regulations 1992, made under the Building Act 2004. It sets out the minimum performance standards for all building work in New Zealand, covering areas including structural stability, fire safety, access, moisture control, durability, energy efficiency, and services.

The Building Code is performance-based, meaning it specifies what a building must achieve (e.g. 'resist moisture from entering the building') rather than prescribing exactly how to achieve it. Acceptable Solutions and Verification Methods published by MBIE provide approved ways to meet the code, but designers can propose alternative solutions if they can demonstrate compliance.

The Building Code has evolved significantly over time. Major changes followed the leaky building crisis (improved weathertightness requirements), the Canterbury earthquakes (updated seismic standards), and ongoing updates for energy efficiency and accessibility. Older buildings may not meet the current code — this is generally acceptable as long as the building met the code in force when it was built, unless major renovation triggers upgrade requirements.

Understanding the Building Code helps you assess whether building work has been done properly and what standards apply if you plan to renovate. Unconsented work that doesn't meet the code can be unsafe, uninsurable, and may need to be demolished or brought up to standard at your expense.

When reviewing a property, check that building work has consents and CCCs. If you're planning renovations, be aware that significant alterations may trigger requirements to upgrade other parts of the building to the current code — this can substantially increase project costs.

Building consent and CCC records are available from the council and shown on the LIM report. The Building Code and Acceptable Solutions are available free online from the MBIE Building Performance website. Your architect, designer, or building inspector can advise on how the current code applies to specific building work or renovation plans.