Composite deck cost calculator
Enter your deck size. You’ll get the full material list with quantities and indicative US retail cost ranges — computed by the same engine that plans real projects on BuildIn AI.
What this calculator includes
- Composite decking boards (with a 10% waste allowance)
- Pressure-treated lumber for joists, beams and rim
- Concrete mix for footings and post bases
- Joist hangers and structural fasteners
What it does not include
- Labor — or the permit and inspection fees your jurisdiction may require
- Railing systems (code-dependent) and stairs beyond the basic deck frame
- Footings deeper than the typical depth, or site work and grading
Want the full plan, not just the shopping list?
BuildIn AI turns your backyard photo into a design render, then resolves it into this material plan plus a step-by-step construction guide.