# Decking Cost Calculator & Price Guide

This is the text version of https://www.supertrades.com.au/calculators/decking-cost-calculator.

Use this decking cost calculator to estimate what you might pay for a new deck or a refresh of an existing one in Australia. Typical pricing starts from $55/m² for a clean and oil restoration and goes up to $440/m² for premium composite decking installation, making it easier to compare timber decking cost, composite decking cost and deck restoration cost in AUD.

## Decking price breakdown

Typical job based on 30 m². Prices are supply-and-install midpoints. Actual quotes vary.

| Type | Cost per m² | Typical 30 m² job |
| --- | --- | --- |
| Clean & oil | $55 | $1,650 |
| Sand & restain | $90 | $2,700 |
| Partial board replace + restain | $150 | $4,500 |
| Softwood (treated pine) (timber) | $240 | $7,200 |
| Hardwood (timber) | $375 | $11,250 |
| Standard composite (composite) | $330 | $9,900 |
| Premium composite (composite) | $440 | $13,200 |

## What affects Decking cost

- **Project type: restoration or new installation:** The biggest cost difference is whether you are restoring an existing deck or building a new one. Restoration starts at $55/m² for clean and oil, while new installations begin at $240/m² for softwood timber and can reach $440/m² for premium composite.
- **Decking material and finish level:** Material choice has a major impact on decking cost per m2. Treated pine timber is priced at $240/m², hardwood at $375/m², standard composite at $330/m² and premium composite at $440/m², while restoration scope ranges from light cleaning through to board replacement and restaining.
- **Repairs to existing decking:** If you are restoring rather than replacing, repair needs can raise the cost to restore a deck. Where repairs are required, add $30/m² on top of the selected restoration finish rate.
- **Extras like stairs, balustrades and screening:** Optional features can increase the total quote beyond the base deck area. Stairs add $2,000, privacy screening adds $1,200, and balustrade is priced at $180.

## Frequently asked questions

### How does the decking cost calculator work?

The calculator uses a per-square-metre rate based on the type of job you choose: restoration, new timber installation or new composite installation. Rates range from $55/m² for a basic clean and oil up to $440/m² for premium composite supply and install, with a displayed estimate range of ±15% around the midpoint. Minimum charges apply at $1,200 for restoration jobs and $5,000 for new installs when the calculated amount is lower.

### What is the deck restoration cost for a typical 30 m² deck?

For a 30 m² deck, clean and oil comes to $1,650 at $55/m², sand and restain comes to $2,700 at $90/m², and partial board replace plus restain comes to $4,500 at $150/m². If the deck also needs repairs, add $30/m², which would add $900 to a 30 m² restoration job. These figures are before optional extras such as stairs, balustrade or privacy screening.

### Can I use a deck restoration cost calculator to estimate the cost to restore a deck with repairs?

Yes — start with the restoration finish rate, then add $30/m² if repairs are needed. For example, a 30 m² sand and restain job is $2,700, and with repairs it becomes $3,600. A 30 m² partial board replace and restain job is $4,500 before any optional add-ons.

### What is the timber decking cost for a new deck?

Timber decking installation cost depends on the species selected. Treated pine softwood is $240/m² supplied and installed, while hardwood such as merbau or similar is $375/m². On a typical 30 m² deck, that works out to $7,200 for softwood or $11,250 for hardwood, before extras.

### What is the composite decking cost per m2 in Australia?

Composite decking cost per m2 starts at $330/m² for standard composite and rises to $440/m² for premium composite. For a 30 m² project, that means a composite decking installation cost of $9,900 for standard boards or $13,200 for premium boards. These prices cover supply and installation.

### What optional items change the total decking cost?

Common add-ons include stairs at $2,000, privacy screening at $1,200 and balustrade at $180. These are added on top of the base deck price, whether you are estimating timber decking cost, composite decking cost or deck restoration cost. They can make a noticeable difference to the final total, especially on larger or more complex projects.

Quotes: [Composite Decking](https://www.supertrades.com.au/composite-decking-installation/index.md).