Composite Decking Cost in Sydney (2026)
In Sydney, composite decking's low maintenance and bushfire-rated options are what justify its premium over timber.
Your composite decking details
Your estimate sits within the typical range.
Composite costs more than timber upfront but needs no oiling or staining, over 10 to 15 years it usually works out cheaper to own.
Where the money goes
Estimated breakdown for your configuration
💰 Ways to save
- Keep the deck shape simple and rectangular, angles and curves waste boards and add labour.
- A ground-level deck avoids the cost of a tall sub-frame, balustrade and steps.
or from $36/week over 5 years , indicative finance
How we estimate this
Composite decking in Australia typically costs $250 to $480 per square metre supplied and installed in 2026, so a 20m² deck lands around $5,000 to $9,500. Board tier, deck height and extras like railings drive the range.
Pricing reviewed: October 2026.
What a composite decking costs in Sydney
Composite decking is a premium choice in Sydney, and the case for it here is low maintenance and durability: it does not need the oiling and sanding that hardwood demands, holds up in the humid summers, and on bushland-adjacent fringes certain composite boards meet bushfire (BAL) requirements that make them a practical choice where timber is restricted. The boards are the premium, but the substructure beneath, bearers and joists in treated timber or steel, is where sloping rocky blocks and sandstone footings add the same cost a timber deck would carry.
Many Sydney decks sit on tight, sloping or elevated blocks where getting the frame level over rock or a fall-away site is the real work, and that is unchanged by the board choice on top. Sydney's highest-in-the-country labour rates fall on the framing and the careful fixing a quality composite board needs, and the eastern and beach suburbs favour composite for its salt resistance over timber that greys and splits. The premium over timber is real, but so is the saving on a lifetime of maintenance.
Compare against the national picture: Composite Decking Cost in Australia →
Composite Decking Cost in other cities
Frequently asked questions
How much does composite decking cost per m² in Australia?
Typically $250 to $480 per square metre supplied and installed in 2026, depending on board tier and deck height. A raised deck costs more due to the larger sub-frame.
Is composite decking cheaper than timber?
It costs more upfront but needs no oiling or staining, so over 10 to 15 years composite is usually cheaper to own than timber once maintenance is counted.