Building a deck is one of the most popular home improvements in Melbourne, offering more outdoor living space, better entertainment areas, and a strong boost to property value. But before starting a project, most homeowners want to know one thing: How much does decking cost in Melbourne?
The truth is, decking prices vary depending on materials, labour, design complexity, and site conditions. This guide breaks down everything you need to know — from cost per square metre to full project estimates — so you can plan your decking project with confidence.
How Much Does Decking Cost in Melbourne?
In Melbourne, the average cost of decking ranges from $250 to $450 per m², depending on the material and build complexity.
Here’s a quick breakdown:
| Decking Material | Average Cost per m² (Installed) | Maintenance Level |
|---|---|---|
| Treated Pine | $250 – $320 per m² | Medium |
| Merbau | $300 – $380 per m² | Medium |
| Spotted Gum / Hardwoods | $350 – $450 per m² | Medium–High |
| Composite Decking | $380 – $500 per m² | Low |
| Premium Composite / Capped Boards | $450 – $600 per m² | Very Low |
These prices include materials, labour, fixings, framing, and standard installation.
Factors That Affect Decking Costs in Melbourne
1. Decking Material
Material choice is the biggest cost factor.
- Pine is the cheapest
- Merbau offers great value
- Hardwoods are premium
- Composite is low‑maintenance but higher upfront
Your long‑term maintenance budget also matters — composite decking costs more initially but saves money over time.
2. Size of the Deck
Larger decks cost more overall but less per square metre because labour becomes more efficient.
Example:
- 10m² deck → higher cost per m²
- 40m² deck → lower cost per m²
3. Height & Structural Requirements
Raised decks require:
- More framing
- Stronger posts
- Additional safety features
This increases labour and material costs.
4. Site Access
Difficult access can increase labour time, especially if:
- The yard is sloped
- Materials must be carried manually
- There are obstacles like trees or fences
5. Extra Features
Add‑ons can increase the total cost:
- Stairs
- Balustrades
- Pergolas
- Privacy screens
- Built‑in seating
- Lighting
- Decking around pools or spas
These features improve functionality but add to the budget.
Cost Breakdown by Deck Size
Small Deck (10–15m²)
$3,000 – $6,000
Ideal for small courtyards, unit balconies, or compact outdoor areas.
Medium Deck (20–30m²)
$6,000 – $12,000
Perfect for family homes and entertainment spaces.
Large Deck (40m²+)
$12,000 – $25,000+
Suitable for expansive outdoor living areas, alfresco zones, and multi‑level decks.
Deck Maintenance Costs in Melbourne
Timber Deck Maintenance
Timber requires ongoing care:
- Oiling: $300 – $800
- Sanding & Re‑oiling: $1,000 – $2,500
- Board replacement: $20 – $40 per board
Most Melbourne homeowners oil their deck every 12–18 months.
Composite Deck Maintenance
Composite decking requires:
- No oiling
- No sanding
- No staining
Just occasional cleaning — making it cheaper long‑term.
Is Composite Decking Worth the Extra Cost?
For many Melbourne homeowners, yes.
Composite decking offers:
- No splinters
- No fading
- No warping
- No termites
- Very low maintenance
While the upfront cost is higher, the lifetime cost is often lower than timber.
How to Save Money on Decking in Melbourne
- Choose Pine or Merbau instead of hardwood
- Keep the design simple
- Avoid unnecessary add‑ons
- Build during off‑peak seasons
- Maintain timber regularly to avoid repairs
FAQ: Decking Costs in Melbourne
How much does a 20m² deck cost?
Between $5,000 and $8,000, depending on materials.
Is composite decking more expensive?
Yes upfront, but cheaper long‑term due to low maintenance.
Do I need a permit for decking in Melbourne?
You may need a permit if the deck is above a certain height or attached to the house. A professional can advise.
How long does it take to build a deck?
Most decks take 3–7 days, depending on size and complexity.
What is the cheapest decking material?
Treated Pine is the most budget‑friendly option.
Final Thoughts
Decking is one of the best investments you can make in your Melbourne home. Whether you choose timber or composite, a well‑built deck enhances lifestyle, increases property value, and transforms your outdoor space.