Invercargill's wet, cold climate means deck use is more seasonal than in northern NZ. Covered or partially enclosed decks extend the usable season. Composite decking resists Southland's moisture well. Here's what deck builders charge in Invercargill in 2026.
Invercargill Deck Costs 2026
| Service | Invercargill typical cost |
|---|---|
| Deck construction (per m²) | $1,450–$2,900/m² |
| Standard 20m² deck with balustrade | $14,500–$36,000 |
| Treated pine (entry-level) | $1,400–$2,400/m² |
| Hardwood (kwila, vitex) | $2,100–$3,800/m² |
| Composite (Trex, ModWood) | $2,400–$4,300/m² |
| Balustrade — glass (per m linear) | $580–$1,350/m |
| Deck stairs (per flight) | $1,700–$4,200 |
All prices GST inclusive. Below national average.
Invercargill Deck Market
Invercargill's wet, cold climate means deck use is more seasonal than in northern NZ. Covered or partially enclosed decks extend the usable season. Composite decking resists Southland's moisture well.
Consent in Invercargill
Decks over 1m above ground, over 20m², or attached to the house require building consent from Southland Council. Ground-level decks under 20m² and under 1m are usually exempt — confirm with your deck builder before starting.
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Related: Deck Building Cost NZ | Pergola Builders Invercargill