Timber Decking Cost Calculator
Estimate the cost of a timber deck in Australia. Enter the size and height, then pick the timber, from treated pine to hardwood, and add extras.
Your timber decking details
Your estimate sits within the typical range.
Hardwood decks need oiling every one to two years to stay looking good and resist greying, factor the ongoing cost in, not just the build.
Where the money goes
Estimated breakdown for your configuration
💰 Ways to save
- Treated pine costs far less if you are happy to oil it and accept a shorter life.
- A simple rectangular, ground-level deck is the cheapest to build.
or from $29/week over 5 years , indicative finance
How we estimate this
Timber decking in Australia typically costs $200 to $400 per square metre supplied and installed in 2026, so a 20m² deck is roughly $4,000 to $8,000. Treated pine is cheapest, hardwoods like merbau and spotted gum cost more.
Pricing reviewed: October 2026.
Doing more than just timber decking?
Build a combined estimate across every part of your project in one place.
Pricing reviewed October 2026. Indicative Australian costs, not a quote.
Understanding timber decking costs in Australia
Timber decking in Australia typically costs $200 to $400 per square metre supplied and installed in 2026, so a 20m² deck is roughly $4,000 to $8,000. Treated pine is cheapest, hardwoods like merbau and spotted gum cost more.
Timber is cheaper than composite to build but needs regular oiling to resist greying and wear, so the ongoing maintenance cost should be weighed against composite's higher upfront price.
Frequently asked questions
How much does timber decking cost per m² in Australia?
Typically $200 to $400 per square metre supplied and installed in 2026. Treated pine is cheapest; merbau and premium hardwoods cost more.
How often does a timber deck need oiling?
Most hardwood decks need oiling every one to two years to resist greying and wear. Treated pine needs similar upkeep and has a shorter outdoor life.
Are you a outdoor / landscaping business?
Everyone on this page is working out what timber decking costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.