10 × 10 deck cost & materials
Short answer
A 10 × 10 ft deck is 100 square feet. In composite it costs about $3,000–$6,000 installed and needs roughly 16 deck boards and 9 joists.
Area
100 sq ft
Composite cost
$3,000–$6,000
Deck boards
16
Joists
9
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Frequently asked questions
How many deck boards for a 10 × 10 deck?
About 16 16-ft boards (5½" wide) for 100 sq ft, including 10% waste. Longer boards mean fewer pieces but more offcuts.
How much does a 10 × 10 deck cost?
A composite 10 × 10 deck costs about $3,000–$6,000 installed. Pressure-treated wood is cheaper; PVC costs more.
How many joists for a 10 × 10 deck?
About 9 joists at 16" on center, plus 6 footings. Enter your exact size and spacing in the calculator.