Do I need a building consent for a deck in NZ?
Short answer
In most cases you don't need a building consent for a deck less than 1.5 metres above the ground — it's exempt under Schedule 1 of the Building Act. Decks 1.5m or higher, or that form part of a pool barrier, generally do need consent. Exempt work must still meet the Building Code.
Key facts
- Decks under 1.5m above ground: usually exempt from consent
- Decks 1.5m or higher: usually need a building consent
- Decks forming a pool barrier have separate, stricter rules
- Exempt doesn't mean rule-free — it must still comply with the Building Code
The 1.5 metre rule
Schedule 1 of the Building Act 2004 exempts a deck, platform or bridge that is less than 1.5 metres above the ground it sits on. Most low ground-level decks fall under this and can be built without a consent.
Height is measured to the ground below, so a deck that steps down a sloping section can exceed 1.5m at the low end even if it looks low from the house.
When a deck still needs consent
A consent is generally required if any of the following apply:
- The deck is 1.5m or more above the ground at any point
- It forms part of a swimming or spa pool barrier
- It involves structural work to the house it attaches to
- Your council's district plan adds local requirements
Exempt doesn't mean unregulated
Even an exempt deck must still be built to the Building Code — sound footings, fixings and balustrades. If you're unsure whether your deck is exempt, ask your local council before you start; getting it wrong can mean costly remedial work or problems when you sell.
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Sources: Building Performance (building.govt.nz) — Schedule 1 exemptions; Building Act 2004, Schedule 1. 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.