Blog→How Much Does It Cost to Build a Deck in NZ? (2026 Prices)
How Much Does It Cost to Build a Deck in NZ? (2026 Prices)
Building a deck in New Zealand costs NZ$300–$450 per m² for treated pine and NZ$350–$550 for kwila hardwood. Per-m² and total price ranges in NZD, cost factors, and how to get a quote.
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Building a deck in New Zealand typically costs NZ$300–$450 per m² for H3.2 treated pine and NZ$350–$550 per m² for kwila (vitex) hardwood, supplied and built. A typical 20 m² deck runs about NZ$6,000–$10,000, while a large or elevated deck with a roof or stairs can be NZ$20,000+. Timber species, height and substructure drive the price. The figures are a guide and include 15% GST.
How much does a deck cost in NZ?
- H3.2 treated pine decking: NZ$300–$450/m²
- Kwila (vitex) hardwood: NZ$350–$550/m²
- Composite decking: NZ$450–$650/m²
- Typical 20 m² deck: NZ$6,000–$10,000
- Elevated deck, stairs or roof: add NZ$5,000–$20,000+
What affects the price
- Timber species: treated pine is cheapest; kwila and composite cost more but last longer.
- Height and substructure: a low ground-level deck is far cheaper than an elevated one needing tall posts, bearers and balustrade.
- Site access and ground: sloping or hard-to-reach sections add labour.
- Extras: stairs, balustrade, a roof or pergola, and finishing (oil/stain) all add up.
- Consent: decks more than 1.5 m above ground (or with certain handrail/area triggers) need building consent and may need engineering, built to NZS 3604.
How to get an accurate decking quote
Ask for the quote to specify the timber species and grade, the substructure, and whether stairs, balustrade and finishing are included. "Kwila decking" and "treated pine" are very different prices. A carpenter using Insta Quotes can price the timber, substructure and labour to current New Zealand rates and send an itemised quote (NZD, 15% GST) on-site.
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