Composite Decking Cost in Melbourne (2026)
In Melbourne, composite decking is chosen to beat the cold, damp weathering that punishes timber here.
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 $35/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 Melbourne
Melbourne's cold, wet winters and wide daily temperature swing are hard on a timber deck, greying it, lifting the grain and demanding regular oiling, so composite is chosen here largely to escape that maintenance and the damp-driven rot and mould a shaded Melbourne deck suffers. The boards resist the weathering that timber cannot, which is their main appeal in this climate. Beneath them, the substructure still has to deal with the city's reactive clay, with footings engineered for the ground movement that would otherwise twist a deck frame.
The reactive-clay footings are the same cost whether the boards on top are timber or composite, so the clay, not the decking, drives the structural side of a Melbourne quote. The deep local trade pool keeps the carpentry competitive, and composite's dimensional stability through the big temperature swings means fewer gaps and cupping than timber over a Melbourne year. The premium over timber buys out the oiling and sanding that a damp, cool climate makes a recurring chore, which is why many owners here make the switch.
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.