Updated April 2026· Independently researched·14 min read
Most decking in Darwin costs $5,750–$18,400
for a standard 15–25 sqm deck
A small 15 sqm hardwood deck in Darwin costs $5,750–$11,500. A medium 25 sqm deck runs $9,200–$18,400. Per-sqm rates range from $205/sqm for treated pine to $630/sqm for composite.
+3.4%Decking costs in Darwin have risen this quarter, driven by strong construction activity and trade shortages.Q1 2026 vs Q4 2025
Average Decking Cost in Darwin
$126
per hour for standard residential work
Call-Out Fee
$63–$158
Emergency Rate
$263–$735
Common Job
$158–$420
Budget $84/hrAverage $126/hrPremium $210/hr
Decking in Darwin costs $205–$400/sqm for treated pine, $345–$630/sqm for merbau hardwood, and $320–$630/sqm for composite decking (all supply and installation). A medium 25 sqm deck costs $9,200–$18,400 depending on the material and complexity.
Quick answerDecking in Darwin costs $205–$400 /sqm, with most averaging $300 /sqm. GST included — verified April 2026. Get free Darwin quotes →
Detailed Pricing — Darwin 2026
Service
Low
Typical
High
Treated pine deck (per sqm)
$205/sqm
$300
$400
Hardwood deck — merbau (per sqm)
$345/sqm
$485
$630
Hardwood deck — spotted gum (per sqm)
$400/sqm
$550
$690
Composite deck (per sqm)
$320/sqm
$460
$630
Small deck (15 sqm, hardwood)
$5,750total
$8,600
$11,500
Medium deck (25 sqm, hardwood)
$9,200total
$13,800
$18,400
Large deck (40 sqm, hardwood)
$14,950total
$21,850
$29,900
Deck steps (per step)
$170/step
$290
$460
Deck balustrade / railing (per lm)
$140/lm
$230
$400
Deck sanding + oiling (per sqm)
$29/sqm
$46
$69
Old deck demolition + removal
$23/sqm
$40
$63
Pergola over deck (basic)
$5,750total
$9,200
$17,250
Getting quotes for decking work in Darwin? Get a quote from a verified local tradie — free, no obligation.
Treated pine ($205–$400/sqm in Darwin) is cheapest but needs regular oiling. Merbau ($345–$630/sqm) and spotted gum are premium hardwoods. Composite ($320–$630/sqm) is low-maintenance.
Deck size
A small 15 sqm deck in Darwin costs $5,750–$11,500. Medium 25 sqm is $9,200–$18,400. Large 40 sqm decks run $14,950–$29,900. Larger decks get slightly better per-sqm rates.
Height & subframe
Ground-level decks in Darwin are simplest. Elevated decks (over 1m) need substantial substructure, posts, and often engineering — increasing costs significantly.
Steps & balustrades
Steps cost $170–$460 per step in Darwin. Balustrades/railings add $120–$350/lm. These are required by code for any deck over 1m above ground.
Site access & slope
A flat, accessible Darwin backyard is cheapest. Sloping sites, difficult access, or existing structures to build around all increase labour time and cost.
Maintenance requirements
Hardwood decks need oiling 1–2 times per year (DIY $50–$100, professional $29–$69/sqm in Darwin). Composite decking needs almost no maintenance — a hose-down is usually sufficient.
How to Save Money on Decking in Darwin
1
Get quotes from licensed Darwin deck builders — make sure each quote includes the same timber species and subframe specifications
2
Consider composite decking if low maintenance is a priority — it costs similar to hardwood upfront but saves on annual oiling
3
Check your Darwin council for permit requirements — decks over a certain height or size may need a building permit
4
Ask about the subframe — a quality subframe (often the biggest cost component) determines how long the deck lasts
5
Factor in ongoing maintenance costs — a hardwood deck in Darwin costs $200–$500/year to maintain; composite costs almost nothing
6
Ask about drainage under the deck and how the structure connects to your house — waterproofing the connection point is critical
Frequently Asked Questions
How much does decking cost per sqm in Darwin?
Decking in Darwin costs $205–$400/sqm for treated pine, $345–$630/sqm for merbau hardwood, and $320–$630/sqm for composite — all supply and installation including subframe.
How much does a 20 sqm deck cost in Darwin?
A 20 sqm deck in Darwin costs approximately $5,500–$11,000 depending on timber type, site conditions, and whether steps or balustrades are needed.
Is composite decking worth the extra cost?
Composite decking ($320–$630/sqm in Darwin) costs slightly more than merbau but requires virtually no maintenance. Over 10 years, it's often cheaper than hardwood when you factor in oiling costs.
Do I need a permit for a deck?
In most Darwin councils, decks under a certain height (usually 500mm–1m) and size don't need a permit. Higher or larger decks typically require a building permit. Always check with your local council before starting.
How long does a timber deck last?
Treated pine decks last 15–20 years with regular maintenance. Hardwood (merbau, spotted gum) lasts 25–40+ years. Composite decking lasts 25–30 years with minimal maintenance.
How long does it take to build a deck in Darwin?
A standard deck (15–25 sqm) in Darwin takes 3–7 days to build. Larger or more complex decks with pergolas, steps, and balustrades can take 2–3 weeks.
Our Methodology
Prices on this page are compiled from publicly available cost guides, leading tradie marketplaces, peak industry body data, and individual tradesperson websites across Australia. We cross-reference ranges from multiple sources and adjust for city-specific cost differences based on advertised rates, salary data, and cost-of-living indicators. Our guides are independently produced — we don't employ tradespeople and have no commercial relationship with any service provider. All prices are estimates and will vary based on your specific job. Always get multiple quotes. Last reviewed April 2026. Read our full methodology →
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