/ Free cost calculator
Deck cost calculator
Punch in your deck size and board type to get a realistic Australian price band for a supplied-and-installed timber or composite deck. Same engine Aussie deck builders use to quote, set to typical 2026 rates.
What the estimate covers
- Substructure (bearers, joists, posts) and footings allowance
- Decking boards in your chosen timber or composite, plus fixings
- Install labour at a typical AU deck-builder day rate
- Optional balustrade and stairs when you toggle them on
What pushes the price up
- Hardwood and composite boards cost more than treated pine
- Height off the ground and sloped sites add substructure and labour
- Balustrade, stairs and council approval allowances
- Demolition if you are replacing an old deck
/ This is a live demo
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The same calculator embeds on your site in one line of HTML. Customers price their job, you get a structured lead in your Karven inbox - already priced, ready to quote.
FAQ
Deck cost questions
How much does a deck cost in Australia?
Most supplied-and-installed timber decks land between $6,500 and $17,500. A small treated-pine deck sits at the low end, while a large hardwood or composite deck with stairs and balustrade pushes the high end. Your size and board choice move the number most.
Is this price for materials only or installed?
It is supplied and installed, GST inclusive. The band covers substructure, boards, fixings and install labour at typical Australian rates. It is an estimate, not a fixed quote - every site is different.
What is the cost per square metre for decking?
Treated pine runs roughly $200 to $350 per square metre installed. Hardwood like merbau or spotted gum is closer to $320 to $480, and composite sits at the top. Height, access and finishing all shift the rate.
How do I get an exact deck quote?
This calculator gives a ballpark band. For a fixed, itemised quote with your real site measurements, a local deck builder running Karven can send you a branded quote in minutes. Hit Get an exact quote to start.
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