Free price 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 Australian 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

For tradies

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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.