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.
Source: Building Performance (building.govt.nz) — Schedule 1 exemptions. Updated May 2026.
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Check a builderKey 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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Related questions
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.