How much does decking cost in Sydney?

Installed decking typically ranges from around $6,000 for a small treated pine deck up to $19,000+ for a larger composite deck. Per square metre this is roughly $280/m² for treated pine up to $560/m²+ for premium hardwood or composite. Raised and high-set decks cost more due to the extra subframe and stairs required.

Is composite decking more expensive than timber?

Composite costs more upfront than treated pine and is comparable to premium hardwood, but it needs no oiling or staining, won't splinter and carries long warranties. Over the life of the deck it often works out cheaper to maintain than timber.

How does deck height affect cost?

The higher the deck, the more subframe, footings and structural work are required, and raised decks usually need stairs and balustrades. Our calculator automatically allows for stairs based on the deck height you select.

Do stairs and handrails add much to the price?

They can. Stairs, handrails and balustrades add materials and labour, especially on higher decks. The calculator lets you include partial or full perimeter handrails so your estimate reflects what you actually need.

Do I need approval for a deck?

Low decks can often be built under exempt development, but raised decks, decks near boundaries and those attached to the house may need approval. We manage engineering, certification and any council applications for you.

Decking Cost Calculator Sydney

Estimate the cost of a timber or composite deck with stairs, handrails and height-based allowances. Get a realistic Budget, Standard and Premium price range in minutes, then book a free on-site consultation for an exact fixed price.

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Average Composite Decks Costs in Sydney

Decking costs in Sydney depend on material, deck height and the size of the area. Typical investment ranges are:

Treated pine deck (~20m²)$6,000 – $9,500

Merbau hardwood deck (~20m²)$9,000 – $14,000

Composite deck (~20m²)$12,000 – $19,000

Figures are indicative only. Use the calculator below for an estimate tailored to your project, or book a free consultation for an exact fixed price.

Composite Decks Cost Calculator

Enter your project details to see an instant Budget, Standard and Premium price range.

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Length (m)Width (m)Decking materialDeck heightHandrails / balustrade

Indicative ranges only. Your exact price is confirmed at a free on-site consultation.

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Spread the cost of your outdoor project over time with up to 72 months interest-free finance available through Humm.

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What Affects the Price

Deck size (length × width)
Material choice — treated pine, Merbau, hardwood or composite
Deck height above ground
Stairs (automatically allowed for based on height)
Handrails and balustrades
Footings and subframe
Site access
Removal of an existing deck
Engineering requirements for raised decks

Why Choose Sydney Outdoor Solutions

Trained in-house teams

Your project is built by our own trained installation teams — never outsourced to subcontractors — so quality and accountability stay with us from start to finish.

Premium trusted materials

We build with premium, proven systems from brands like BlueScope, Colorbond, Stratco and Bondor — selected for durability and long-term warranty support.

Design to handover service

We manage the whole project for you — custom design, engineering, council approvals and construction — so you have a single point of contact throughout.

Up to 25-year warranties

Our work is backed by up to 25-year product warranties and a 10-year installation warranty, plus 72-month interest-free finance to make it accessible.