Planning a decking project in Australia? Our comprehensive 2026 guide breaks down the decking cost per m² in Australia for all materials, from affordable timber to premium composite options. Get accurate estimates, compare prices, and budget wisely for your outdoor renovation.
When calculating your decking cost per m² in Australia, you need to consider material choice, labour, location, and design complexity. The average decking project in Australia ranges from $120 to $450 per square metre fully installed, with significant variations based on your material selection. This 2026 guide provides current pricing data to help Australian homeowners make informed decisions for their outdoor living projects.
In this comprehensive analysis, we'll break down the composite decking cost per m² Australia homeowners should expect, compare it with traditional timber options, and provide region-specific insights for Sydney, Melbourne, Brisbane, Perth, and Adelaide markets.
Most affordable traditional option
Low-maintenance premium option
Durable traditional premium choice
| Material Type | Material Cost/m² | Labour Cost/m² | Total Installed/m² | Typical Project (20m²) | Lifespan |
|---|---|---|---|---|---|
| Treated Pine | $60-$90 | $90-$130 | $150-$220 | $3,000-$4,400 | 10-15 years |
| Merbau Timber | $80-$120 | $100-$130 | $180-$250 | $3,600-$5,000 | 15-20 years |
| Composite (Standard) | $130-$200 | $120-$150 | $250-$350 | $5,000-$7,000 | 25+ years |
| Composite (Premium) | $200-$300 | $150-$200 | $350-$500 | $7,000-$10,000 | 25-30+ years |
| Spotted Gum | $100-$160 | $100-$140 | $200-$300 | $4,000-$6,000 | 20-25 years |
| Ironbark | $140-$220 | $110-$150 | $250-$370 | $5,000-$7,400 | 25+ years |
Your location significantly impacts how much decking costs per m² in Australia. Here's the 2026 regional breakdown:
Reduce your decking cost per m² with these proven strategies:
30m² × $300/m² = $9,000
This is an estimate only. Get 3 quotes for accurate pricing.When budgeting for your deck, remember these additional expenses that affect the total decking cost per m² in Australia:
The Australian decking market continues to evolve with these 2026 trends affecting decking cost per m²:
Explore our other international measurement and calculation guides:
The average decking cost per m² in Australia ranges from $120 to $450 per square metre fully installed, depending on material choice. Timber decking averages $120-$250/m², while composite decking costs $250-$450/m². Premium hardwoods fall in the $200-$400/m² range.
Composite decking often justifies its higher cost per m² through significantly lower maintenance (no staining, sealing, or sanding), longer lifespan (25+ years), better durability, and resistance to rotting, splintering, and insect damage. The total cost of ownership over 15+ years is often comparable to timber when maintenance is factored in.
Labour typically accounts for 40-50% of the total decking cost per m². In 2026, expect to pay $90-$200 per square metre for professional installation, depending on complexity, location, and tradesperson experience. Simple ground-level decks are at the lower end, while elevated or complex designs cost more.
The main factors affecting how much decking costs per m² in Australia are: material choice (timber vs composite vs hardwood), deck height and complexity, location and access, balustrade requirements, council permit costs, and current material availability. Design complexity can increase costs by 20-50%.
DIY can reduce your decking cost per m² by 40-60% by eliminating labour costs. However, consider your skill level, time commitment, tool requirements, and permit regulations. Mistakes can be costly to fix. Many Australians opt for a hybrid approach: professional design/foundations with DIY decking board installation.
While timber has a lower initial cost per m², composite often becomes cost-competitive over 10+ years. Timber requires annual maintenance ($200-$500/year for cleaning, sealing), occasional repairs, and replacement after 10-15 years. Composite needs only occasional cleaning with no sealing or repairs, lasting 25+ years.
Yes, you can save 5-15% on decking cost per m² by installing during off-peak seasons (autumn and winter). Spring and summer are peak seasons with higher demand and prices. Some suppliers also offer discounts on materials during end-of-financial-year sales (May-June).
When planning your Australian decking project in 2026, remember that the decking cost per m² is just one factor in your decision. Consider:
Always obtain 3 detailed quotes for your specific project, check references, and ensure your contractor is licensed and insured for deck construction in your Australian state or territory.