How much does composite decking cost per m²?
Composite decking boards cost $142.16 to $164.83 per m² on this site, GST included. A 5 × 4 m deck takes 29 Classic 140 boards ($3,743), 23 Wide 180 boards ($3,266), 44 Narrow 88 boards ($3,490), with 10% waste allowed.
| Board | Per m² | Per board | Lineal m per m² |
|---|---|---|---|
| Classic 140, 140 mm | $164.83 | $129.06 | 6.9 |
| Wide 180, 180 mm | $142.16 | $142.02 | 5.4 |
| Narrow 88, 88 mm | $157.96 | $79.33 | 10.8 |
Per m² is the only fair comparison
A 180 mm board costs more per board than a 140 mm board, but it covers more deck, so Wide 180 works out at $142.16/m² against $164.83/m² for Classic 140. Price per m² = price per lineal metre × lineal metres per m² (1 ÷ (board width + gap)).
What else to budget for
- Hidden clips: about 20 per m² for 140 mm boards at 350 mm joist spacing
- Subframe: joists at 300–400 mm centres
- Fascia or end trims for exposed edges
- Delivery: quoted by postcode, boards go on a pallet
- Installation: by your own builder or carpenter
Price my deck size Full price list
Questions
How much is composite decking per m² in Australia?
On this site composite decking boards cost $142.16 to $164.83 per m², GST included, boards only. Classic 140 (140 mm) is $164.83/m²; Wide 180 (180 mm) is $142.16/m²; Narrow 88 (88 mm) is $157.96/m².
Why is the per-board price not the per-m² price?
Wider boards cover more deck per lineal metre, so a dearer board can still be cheaper per m². Always compare per m², with the gap included.
What else do I pay for besides boards?
Hidden clips, a subframe (joists), fascia or end trims, and delivery. These go on your quote, itemised, before you pay.
Does the price include installation?
No. We sell the materials. Your builder, carpenter or landscaper installs them.