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Deck build cost calculator
Data snapshot 2026-09 · HomeTrueCost
A 320 sqft composite deck typically runs $13,000–$20,000 professionally built — size and material drive the range. Adjust the inputs for an itemized receipt.
Frequently asked questions
How much does a deck cost in 2026?
A 320 sqft composite deck typically runs $13,000–$20,000 pro-built. Pressure-treated starts near $9,000; composite runs about 40% more all-in; elevated structures add about 25%.
What drives deck cost the most?
Size plus board material, then height — footings, beams, stairs, and rail for elevated decks. Permits and frost-depth footings vary by state.
Is this quote a contractor bid?
No — a planning estimate. Soil, frost depth, and ledger conditions vary; get 3 local bids.
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