Deck Cost Calculator
Estimate the cost of building a deck in Australia. Enter the deck area, choose the decking material and height, then add features like a roof, balustrade or stairs.
Your deck details
Approximate deck size in square metres.
Your estimate sits within the typical range.
Your estimate sits within the typical range.
Where the money goes
Estimated breakdown for your configuration
Ways to save
- Treated pine is cheapest; keeping the deck ground-level avoids balustrade costs.
- Skip the roof/pergola over the deck unless you need year-round shade.
How we estimate this
A deck in Australia typically costs $200–$350 per square metre in 2026 for the deck itself, depending on material. Treated pine is cheapest, hardwood mid-range, and composite the most expensive but lowest-maintenance.
Pricing reviewed: October 2026.
Deck prices by city
Costs vary by city. See the local breakdown for your capital.
Doing more than just deck?
Build a combined estimate across every part of your project in one place.
Pricing reviewed October 2026. Indicative Australian costs, not a quote.
Understanding deck costs in Australia
A deck in Australia typically costs $200–$350 per square metre in 2026 for the deck itself, depending on material. Treated pine is cheapest, hardwood mid-range, and composite the most expensive but lowest-maintenance.
Elevation, a roof or pergola, balustrades and stairs add significantly. An elevated deck needs more substructure and a balustrade for safety compliance.
Frequently asked questions
How much does a deck cost per square metre in Australia?
Decks typically cost $200–$350/m² in 2026. Treated pine is cheapest, hardwood mid-range, and composite the most expensive but lowest-maintenance.
Is composite decking worth the extra cost?
Composite costs more upfront but needs no oiling or staining and lasts longer, so it can work out cheaper over time. It suits people who want minimal maintenance.
Do I need council approval for a deck?
Low ground-level decks are often exempt, but elevated decks usually require approval. Rules vary by state and council, check before building.
Are you a renovation business?
Everyone on this page is working out what deck costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $100/mo.