Deck and Pergola Cost Guide, Australia 2026
Price ranges based on current Australian market rates. Actual costs depend on materials, site conditions, and your location.
Decking cost by material
Treated pine$200–$280/m²
Most affordable option. Needs periodic oiling and treatment to prevent rot.
Hardwood (Merbau)$300–$400/m²
Durable and attractive. A popular mid-range choice in Australia.
Composite$350–$600/m²
Low maintenance, no oiling needed. Higher upfront cost, lower long-term cost.
Typical total project costs
Small deck (10–20m²)$3,500–$6,000
Ground-level, treated pine, basic design.
Mid-size deck (25–40m²)$5,000–$10,000
Hardwood or composite, some steps included.
Large deck (50m²+)$10,000–$20,000+
Premium materials, elevated with balustrades, complex design.
Pergola (freestanding)$8,000–$20,000
Timber or aluminium, open or roofed. Custom louvred roofs sit at the higher end.
What affects the price
- ·Height from ground: Elevated decks need more complex footings and must have balustrades by code, adding $180–$320 per linear metre.
- ·Roof type: An open pergola is the cheapest option. A pitched Colorbond roof adds cost, and motorised louvres sit at the top end.
- ·Site conditions: Sloped ground or poor soil adds to footing costs. Rock removal is charged separately.
- ·Council approval: Most structures over 10m² need a building permit. Permit costs vary by council but typically run $300–$1,500.
- ·Location: NSW carpenter rates run $200–$210/hour versus $170–$180/hour in WA.
Common questions
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