Timber or composite deck: costs and options
Compare a new deck with repairing the existing substructure. Decking boards are only one cost. Posts, bearers, joists, connections, stairs and balustrades can change the scope considerably.
What to include in the scope
Measure deck area and list stairs and balustrades separately. Compare treated timber and hardwood against the finish, fixings and ongoing maintenance. Check local approval requirements and ask about access for footing work and material delivery.
Australian Government YourHome — Preliminary research. Reviewed 12 November 2026. This reference provides planning context.
Build your budget
Adjust the quantities and unit rates. This is a planning tool, not an installer quote.
Use local itemised quotes as the starting rates. Freight, labour availability and minimum call-out charges can change the total by location. Enter GST-inclusive rates where available and list removal, disposal and access separately when excluded.
Ask before you accept a quote.
- Which timber and fixings are specified, what is allowed for excavation or difficult access, and who arranges any approvals?
- Is GST included, and is the price fixed or estimated?
- Are removal, disposal, access and making-good included?
- What changes would trigger extra costs, and who approves them?
- What is the warranty on products and workmanship?
Compare quotes against the same scope
Record itemised inclusions from at least two quotes, then evaluate differences in quality, warranty, timing and exclusions.
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