Composite Decking Prices in Australia: What You’ll Actually Pay

Composite decking boards in Australia range from around $50/m² at the entry level to $190/m² for premium co-extruded products. Add subframe, labour, and extras, and the fully installed cost runs from roughly $100/m² to $450/m² — depending on grade and site conditions.

The board price alone won’t get you to a real budget. This guide covers every cost component — materials, subframe, labour, and the extras most quotes leave out — so you can plan accurately and ask better questions of your suppliers.

How Much Does Composite Decking Cost in Australia?

The table below shows the three main market tiers and what each costs in 2026 — boards only, and fully installed.

Board Grade	Board Cost (per m²)	Fully Installed (per m²)
Entry-level (uncapped)	$50–$80	$100–$180
Mid-range (capped composite)	$80–$130	$180–$300
Premium (full co-extruded)	$130–$190	$300–$450

These ranges reflect what you’d pay through a standard retail or distribution chain. Factory-direct pricing — buying from a manufacturer without importer or retailer margins — typically sits in the lower half of the mid-range band for the same quality board.

→ Explore our full composite decking range to see board dimensions, weights, and specs across every product series.

What Makes Up the Total Project Price?

Most quotes lead with the board price per m². But a finished composite deck has four cost components: boards, subframe, labour, and extras like fixings, fascia boards, delivery, and waste removal.

The boards often make up just 30–45% of the total installed cost. The rest is what you need to budget before work starts.

Board Grade and Cap Layer Quality

Composite boards fall into three construction types — uncapped, single-cap, and full co-extruded — and each sits at a different price point for a reason.

Uncapped boards have no protective outer layer. They’re cheap upfront, but Australian UV will degrade the surface fast. They’re not a good fit for outdoor use here.

Single-cap boards add a layer on the face and edges. Full co-extruded boards wrap all four sides in a cap layer. That cap is what holds colour over time — it’s the most important spec to ask about when comparing composite decking boards.

LastElegance boards use a 0.8 mm co-extruded cap — thicker than most on the market. The HDPE core runs at 0.95 g/cm³ density, with a 60% recycled / 40% virgin material blend. After 3,000 hours of QUV accelerated weathering, the colour shift is ΔE ≤ 4–5. That’s a number you can hold a supplier to — not a vague claim about colour retention.

Wood fibres in quality composite wood decking come from hardwood sources. The manufacturing process binds them with HDPE under heat and pressure, then applies the cap layer in the same extrusion pass. That integration is what gives the cap layer its adhesion strength.

Solid boards cost more per linear metre than hollow boards. Both share the same finishes and colours. The right choice depends on your load requirements.

Subframe Costs

The subframe is the structural base your boards sit on. It’s not optional, and it’s often undercosted at the quote stage.

The three main options are treated pine ($30–$45/m²), steel framing ($60–$90/m²), and composite battens ($40–$60/m² — a good fit for decks over concrete). Subframe construction choice affects both cost and long-term stability.

Joist spacing matters. The recommended spacing is 300–350 mm centre-to-centre. Go wider, and you risk board deflection — and in most cases, you’ll void the warranty. The fastening system also depends on getting this right: clips need a solid joist to grip.

The NCC (National Construction Code) sets the structural requirements for deck subframes. Any reputable installer will frame to those standards. If a quote doesn’t mention subframe specs, ask.

Labour and Installation

Labour typically makes up 40–65% of the total installed price. It’s the biggest variable in any composite decking quote.

The hidden fastener system used with grooved composite boards speeds up installation compared to screw-fixed timber. The clip slides into the board groove and locks onto the joist — no surface screws, no pre-drilling each fixing point. For a two-person crew on a simple rectangular deck, the pace is good.

What slows things down: complex shapes, elevated builds, difficult site access, and second-storey installs. These add real time, and time is a labour cost.

Labour-only rates across Australia run from roughly $90/m² for simple ground-level work to $180/m² for complex or elevated decking. Metro areas tend to sit at the higher end.

Extra Costs Quotes Often Miss

Four costs regularly arrive as surprises.

Fascia boards — these finish the perimeter edge and are often left out of a board price quote. Budget for the linear metres around your deck edges.

Delivery — varies by region and order size. Large-format trade orders shipped factory-direct in full containers come with better freight terms on bigger volumes. A 40′ container order takes approximately 15 days production + 2 days packing + 24–32 days sea freight. If you’re ordering direct, build that into your project schedule.

Site preparation — clearing old decking, levelling uneven ground, or fixing drainage adds cost before a new board goes down.

Waste removal — old timber doesn’t disappear. If it’s not in the quote, ask about it upfront.

Composite vs Timber: The Real 10-Year Cost

Composite costs more upfront. Timber costs more over time. Here’s what that looks like on a 40 m² deck.

Cost Component	Treated Pine	Mid-Range Composite
Upfront installed cost	$6,000–$8,000	$9,000–$12,000
5-year running cost	$2,400–$6,400	~$0
10-year total (midpoint)	~$18,000+	~$10,500

Timber needs staining, oiling, or sanding every 1–2 years — roughly $30–$80/m² per service on a 40 m² deck. Composite decking cost over that same period is almost nothing. A hose-down a couple of times a year is all it takes.

Composite typically breaks even with traditional timber at the 5–7 year mark. After that, the savings grow every year.

There’s another factor worth naming: termites. In Queensland, northern NSW, and across WA, termite damage to a timber deck is a real risk — and a full replacement cost. Composite boards are termite-resistant. That risk disappears.

Our boards carry a 15-year warranty. That’s a concrete commitment on the metrics that matter most over the long run.

→ Request Free Samples — compare decking boards side by side before you spec your next project.

What Pushes the Price Up?

The board price per m² is fixed. These are the site and design variables that determine the total cost for any real decking project.

Deck Size and Shape

Larger decks cost more in total but less per m². Fixed costs — delivery, site setup, subframe footings — spread over more area as the deck grows. A 100 m² composite deck will almost always have a lower cost per square metre than a 25 m² deck from the same supplier.

Complex shapes are where budgets stretch. Curves, multiple levels, and angled cuts add 15–30% to labour and generate more off-cut waste. A simple rectangle on flat ground is the most cost-efficient design. If you can achieve the brief with a rectangular layout, do it.

Site Conditions and Access

Uneven ground needs levelling or extra subframe work before boards can go down. Difficult access — tight side entries, second-storey installs, or composite boards over concrete — adds labour time and materials handling cost.

Flag site conditions at the quote stage. Contractors who find them on-site will often raise a variation. Getting it documented upfront protects both parties and keeps the project price predictable.

Solid vs Hollow Boards

Hollow boards are lighter, faster to handle, and cheaper per linear metre. Solid boards cost more but handle heavier loads and feel more solid underfoot.

For standard residential decking — foot traffic, outdoor furniture, typical use — hollow boards work well. For commercial projects, high-traffic areas, or decks that will carry heavy furniture or equipment, solid boards are worth the extra cost.

Both profiles are available in the same colour and finish options across the range. The choice affects price and install speed — not the look of the finished deck.

Cheap vs Premium Composite: What’s Different?

Two composite boards can look the same in a supplier photo. They are not the same product.

Here’s what actually separates cheap from premium composite decking boards:

1. Cap layer — present or absent. Uncapped boards have no protective outer layer. They’ll fade and soften under Australian UV. A full co-extruded cap at 0.8 mm gives real protection. Anything thinner is a compromise on longevity.
2. HDPE density and blend. Premium composite wood decking uses HDPE at 0.95 g/cm³ — a density that holds shape under heat and load. Cheaper boards often use lower-grade polymer or a high recycled-content blend without the right UV stabilisers to back it up.
3. Flexural strength. A concrete benchmark is 26.2 MPa per EN 15534. Boards below this will deflect more over time — especially at wider joist spacings. That means bounce, creak, and eventually callbacks.
4. Slip resistance rating. Premium boards hold R11 per DIN 51130 / AS 4586. That rating is required for pool surrounds and many commercial projects. Cheaper composite decking material may not be tested at all — so you won’t know its real grip rating until someone slips.

The risk with cheap boards isn’t just that they look worse over time. A board that fades, cups, or loses surface grip is also a warranty claim, a liability issue, and a client callback. Buy cheap composite once, and you often end up buying again — or arguing about what the warranty actually covers.

→ Request Free Samples — hold the product before committing to a volume order.

How Factory-Direct Pricing Saves Trade Buyers Money

The standard composite decking supply chain in Australia runs: manufacturer → importer → distributor → retailer → buyer. Each step adds margin. By the time the board reaches a builder’s yard, it can carry two or three layers of markup on top of the factory price.

Factory-direct means buying from the manufacturer and shipping straight to your project or warehouse. No importer. No middleman. The same board — same HDPE grade, same 0.8 mm cap, same manufacturing process — lands at a lower composite decking cost because fewer parties have taken a cut.

For a distributor or contractor buying at volume, that difference across a full container is real money.

It also opens up options a retail supply chain can’t offer. Custom board lengths, colours, surface textures, and profiles are available when you’re ordering from the factory. That matters for builders who need to match a specific project spec or give clients something their competitors can’t source off the shelf.

→ Contact Our Sales Team — talk to us about volume pricing and what a factory-direct arrangement looks like for your business.

Mistakes That Push Up Your Decking Costs

These aren’t rookie errors. They’re patterns we see across projects from experienced builders and procurement teams alike.

1. Getting only one quote. Without a like-for-like comparison, you can’t tell if the price is fair or if the spec is right. Get at least two quotes — and make sure both are priced on the same board grade and subframe type.
2. Choosing boards without checking the cap layer spec. Uncapped composite decking options are cheaper. They’re also wrong for Australian conditions. Always confirm whether a board is co-extruded and what the cap layer thickness is. If the supplier can’t tell you, that’s your answer.
3. Underestimating subframe cost. Subframe materials make up 25–40% of the total installed price on most projects. Budgeting only for boards and labour without pricing the subframe leads to gaps and blowouts when the real quote comes in.
4. Ordering the wrong quantity. Off-cut waste on most decking projects runs at 10–15% of the total board area. Don’t order to your exact m² figure — especially on irregular shapes. Order 10–15% more and avoid a mid-project materials delay.
5. Ignoring delivery lead times. Factory-direct orders need 6–8 weeks from order to delivery in Australia. If you’re working to a build schedule, lock in your order early. A decking delay can hold up the whole project handover.
6. Skipping council approval. Decks over 1 m high or attached to the dwelling often need a building permit. Check your state and local council rules before work starts. Permit costs are typically $200–$800. Build without one, and you risk a stop-work order or a problem at resale.

FAQ