12 × 16 deck cost & materials
Short answer
A 12 × 16 ft deck is 192 square feet. In composite it costs about $5,760–$11,520 installed and needs roughly 29 deck boards and 13 joists.
Area
192 sq ft
Composite cost
$5,760–$11,520
Deck boards
29
Joists
13
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Frequently asked questions
How many deck boards for a 12 × 16 deck?
About 29 16-ft boards (5½" wide) for 192 sq ft, including 10% waste. Longer boards mean fewer pieces but more offcuts.
How much does a 12 × 16 deck cost?
A composite 12 × 16 deck costs about $5,760–$11,520 installed. Pressure-treated wood is cheaper; PVC costs more.
How many joists for a 12 × 16 deck?
About 13 joists at 16" on center, plus 6 footings. Enter your exact size and spacing in the calculator.