Deck Cost Calculator
Free deck cost calculator. Estimate decking, framing, and total material cost for wood, composite, or hardwood decks. No signup.
What is a deck cost calculator?
A deck cost calculator estimates the material cost of building a deck from its footprint and decking material — deck boards plus a rough framing and fastener allowance. It’s the shopping number that gets you in the right budget range.
How this calculator works
- Enter the deck length and width in feet.
- Area × price-per-square-foot gives the decking cost for your chosen material.
- A framing and fastener allowance is added — larger for wood, smaller for composite.
- A custom price field lets you override the defaults with local quotes.
How to use the result
- Use it as the material budget, then add labor — professional installs typically run 2–3× material.
- Compare materials: pressure-treated wood is cheapest to buy, composite costs more but needs no yearly staining.
- Add the cost of the substructure separately for a high or multi-level deck.
- Get two lumber-yard quotes and compare against this estimate.
How much does it cost to build a deck?
Material for a 16×12 deck in pressure-treated wood runs about $1,000–$1,200 — around $5.50–$7 per square foot including framing. With professional labor, most decks land between $25 and $50 per square foot, with composite materials at the top end.
Common mistakes
- Quoting decking only. Joists, posts, footings, and fasteners add 40–60% to a wood deck’s material bill.
- Ignoring permits and footings. Concrete piers and local inspections are real, often-missed costs.
- Forgetting maintenance. Wood needs sealing every 1–2 years; composite’s higher upfront price buys that back.
Deck material is priced like the lumber calculator’s board feet — volume and grade matter. The concrete calculator covers the footings under the posts, and the fence post calculator handles any railing posts.