The Real Cost of Timber vs. Composite Decking in Australia 2026

The Real Cost of Timber vs. Composite Decking in Australia 2026

Building a deck is a rite of passage for many Australian homeowners looking to embrace the "indoor-outdoor" lifestyle. Whether you’re envisioning weekend BBQs in suburban Melbourne or a sun-drenched platform in Queensland, the first major hurdle is choosing between traditional timber and modern composite materials. Both have their merits, but the price gap isn't always found where you’d expect it.

When evaluating costs, most homeowners look only at the "off-the-shelf" price of the boards. However, in the Australian climate—where UV levels are extreme and termites are a genuine threat—the total cost of ownership involves much more than the initial purchase. You have to account for the sub-frame, the fasteners, the professional labour rates (which currently sit between $80 to $120 per hour in most capital cities), and the inevitable maintenance.

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The Initial Investment: Timber

Timber remains the classic choice, but the species you choose dictates the price. Treated Pine is the most budget-friendly option, often costing between $200 and $300 per square metre installed. However, if you want the premium look of Spotted Gum or Blackbutt, expect those costs to jump to $450+ per square metre.

The Rise of Composite Decking

Composite decking (like Trex or ModWood) has a higher entry price—usually starting at $500 per square metre. While the "sticker shock" is real, many Australians are pivoting to this because it requires zero oiling, sanding, or staining. In the harsh Aussie sun, a timber deck can require $500 worth of oil and a full weekend of work every 12 months.

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