Key points at a glance
- A building consent is formal approval from your council that your plans comply with the Building Code.
- It must be granted before the work starts — you cannot get one retrospectively without an extra Certificate of Acceptance process.
- Councils (Building Consent Authorities) have 20 working days to process a complete application.
- Building without a required consent is an offence and can lead to a Notice to Fix and fines.
What a building consent is
A building consent is a formal approval issued by your local council, acting as a Building Consent Authority (BCA), confirming that your proposed building work complies with the New Zealand Building Code. It is separate from a resource consent, which deals with planning and land-use rules.
You apply before any work begins, submitting plans, specifications and supporting documents. Once granted, the council inspects the work at key stages and issues a Code Compliance Certificate (CCC) at the end if everything passes.
Work that typically needs a consent
Consents are generally required for new buildings and most additions, structural alterations, re-piling, retaining walls over 1.5m (or those carrying a load), decks over 1.5m high, plumbing and drainage changes, installing or relocating a wood burner or heating appliance, and building work affecting fire safety or access.
If you are unsure, your council’s duty planner can tell you whether your specific project needs a consent. It is always cheaper to ask first than to fix unconsented work later.
The consent process and timeframes
A BCA has 20 working days to process a complete application. That clock stops if the council asks for further information (an RFI), so incomplete applications take much longer in practice.
Fees vary by council and project size, and you should budget for the consent fee, inspection fees, a development contribution in some cases, and the cost of a Code Compliance Certificate at the end.
For homeowners
- Check with your council before you start — ask the duty officer if your project needs a consent.
- Never pay for major building work that should be consented if the tradesperson suggests skipping it.
- Unconsented work can stall a future house sale and may not be covered by insurance.
For tradespeople
- Confirm the consent is granted before starting restricted or structural work.
- Book inspections at the required stages so the CCC is not delayed.
- Keep records and producer statements to support the Code Compliance Certificate.
The information on this page is provided as a general guide only. tradedirectory.co.nz makes no representations or warranties regarding the accuracy, completeness, or suitability of this information for your specific situation. Costs, timeframes, and recommendations vary significantly depending on your location, property, and individual circumstances. Always obtain multiple quotes from qualified tradespeople and seek independent professional advice before undertaking any home improvement or building work. tradedirectory.co.nz accepts no liability for any loss or damage arising from reliance on the information provided on this site.