Building Consent NZ — How the Process Actually Works

The Facts

Building consent is the approval issued by a Building Consent Authority (BCA) under the Building Act 2004, certifying that the proposed building work meets the New Zealand Building Code. It is separate from resource consent and required for almost all construction. Applications require detailed drawings, specifications, producer statements (PS1 design, PS2 review, PS3 construction, PS4 construction review), and compliance documentation. Auckland Council fees are tiered by project value and complexity. Statutory timeframe is 20 working days but the clock pauses every time the BCA issues a Request for Information (RFI), which is where most projects lose weeks of programme.

A Developer's Take

Building consent is the council saying yes, the proposed work meets the NZ Building Code. Separate from resource consent. Required for almost all construction.

20 working day statutory clock, in theory. In practice, the clock stops every time the council issues an RFI, and most building consents go through at least one RFI cycle. Realistic timeframe for a residential build is 6-10 weeks. Commercial 10-16 weeks.

The producer statements are where the process actually lives. PS1 from the designer, PS2 from the design reviewer, PS3 from the constructor, PS4 from the construction reviewer. A clean producer statement package speeds the consent. A missing or incomplete PS triggers RFIs that pause the clock.

Where projects actually get stuck: RFIs on H1 (energy efficiency) since the November 2022 update. The insulation requirements got materially tougher and many designers are still catching up. If your designer is using H1 acceptable solutions, double-check the insulation specifications match the actual climate zone (zone 1 vs 2 vs 3 is significant).

Fees are tiered by project value. A $500k residential is around $4-6k in council fees. A $5m commercial can be $30k+. Budget the consent fees as a hard cost line item in feasibility, not an afterthought. Architects submitting the consent will nominate how much cost per metre the build is — this is what the council uses to determine your fees. Lower cost to build, lower council fees; higher cost to build, higher council fees.

Use a consent expediter if your project is sensitive on programme. They cost $5-15k but can save weeks by managing the RFI process actively rather than reacting to it.

Understanding what plan changes after the consent can do — minor variation vs an amendment — is important. Minor variations can be done onsite and approved by the inspector in most cases; like insulation; if the R-value meets the H1 requirement they typically don't care if it's Earthwool glasswool or Pink Batts glasswool. This is fairly common practice in residential home building, as insulation is one of the most substituted products in construction.

When to use this

Building consent is the second statutory hurdle, after resource consent, and the one that controls when you can actually break ground. Lodge a complete application — drawings, specs, producer statements, compliance schedule — rather than rushing in with gaps; the RFI loop is what kills programme. Treat the 20 working day clock as a best case and plan around the likelihood of one or two RFIs. Engage your structural engineer and architectural designer to coordinate PS1s before lodgement, not after. A clean BCA file is the cheapest acceleration you can buy.