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NZ Building Answers

How much does it cost to build a deck in NZ in 2026?

Updated May 2026

Short answer

A standard treated-pine deck in 2026 runs $300-500 per m² for a simple ground-level deck, $500-800/m² for a raised deck with handrails, and $800-1,500+/m² for hardwood (kwila, vitex) or composite decking. A 25 m² deck typically lands $8-20k installed. Hardwood and composite cost more upfront but last longer with less maintenance.

Source: Master Joiners pricing. Updated May 2026.

By the numbers

Regional 2026 pricingSource: CheckMyBuilder cost index

We publish independent 2026 cost ranges for 28 project types, adjusted by region, with the consent fee and processing time for your council built in. We do not sell renovations, so the figures have no reason to flatter anyone.

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Key facts

  • Treated pine, ground-level: $300-500/m²
  • Treated pine, raised with handrails: $500-800/m²
  • Hardwood (kwila / vitex): $800-1,300/m²
  • Composite decking (Trex, Modwood): $1,000-1,500+/m²
  • Decks under 1.5m generally don't need consent

Material choice — long-term cost

Treated pine: cheapest upfront, needs oiling/staining every 1-2 years, lifespan 12-15 years without major work.

Hardwood: higher upfront, oil every 2-3 years, lifespan 25+ years.

Composite: highest upfront, almost no maintenance, lifespan 25+ years, doesn't splinter or grey.

Cost over 20 years tends to favour hardwood or composite even though upfront is higher.

What's in the per-m² price

Decking boards, joists, posts, fixings, labour. Usually excludes: foundation work for raised decks, balustrades for raised decks (~$200-400/m), stairs, footings.

Always get the quote with what's included spelled out.

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Related questions

Sources: Master Joiners pricing; Carter Holt Harvey / ITM merchant pricing 2026. 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.