Do I need a building consent to build a deck in NZ?
Short answer
Decks under 1.5 metres from the ground are usually exempt from building consent under Schedule 1 of the Building Act. Decks 1.5 metres or higher, or that form part of a pool barrier, generally need consent. Even an exempt deck must still meet the Building Code — exempt is a paperwork shortcut, not a free-for-all on quality.
Source: Building Act 2004 Schedule 1. Updated May 2026.
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Check a builderKey facts
- Schedule 1 of the Building Act exempts decks under 1.5m
- Pool-barrier decks have separate rules (Fencing of Swimming Pools Act)
- District Plan may add height/setback rules even for exempt decks
- Structural attachment to a house can trigger consent regardless of height
- Building Code (B1 structure, B2 durability) still applies in full
How the 1.5m is measured
Height is measured to the ground directly below at any point of the deck. On a sloping section, a deck that looks low at the house can be over 1.5m at the far corner — and then needs consent.
If you're close to 1.5m, get a quick measurement check before you commit. Most council building helpdesks will give a verbal opinion for free.
Pool decks are different
If your deck is part of the fence around a swimming or spa pool, it falls under the Fencing of Swimming Pools Act 1987 (now embedded in the Building Act). That's a separate consent regime focused on barriers, not height. Always confirm with the council if water is involved.
Knowing the rules is half the job. The other half is knowing who you're hiring. Check any NZ builder against the public record: company status, licensing and insolvency notices, from the official NZ sources.
Related questions
Sources: Building Act 2004 Schedule 1; Fencing of Swimming Pools Act 1987. General information for NZ homeowners, not legal advice. Building rules change and vary by council, so confirm critical details on the official source before acting. Last updated 2026-05.