Free cost calculator

Deck building cost, estimated in seconds.

Choose the kind of deck, then set its size and railing. We'll estimate the installed price from published national averages.

Estimated total

$3,500–$7,000

Typical range from published national prices

Deck size$3,500–$7,000

Estimates use published national averages. Your quote depends on your job and your area.

1Type of deck

Deck size$25–$50 per sq ft140 sq ft

Railing$20–$60 per ft0 ft

A 12×12 deck is 144 sq ft. A 16×20 deck is 320 sq ft.

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Prices are installed, with materials and labor.
Composite and hardwood decking cost more than pressure-treated wood.
Stairs, built-in benches, lighting and permits add to the total.
Second-story and multi-level decks need more structure, so they cost more per square foot.
Prices vary a lot by area. Compare two or three quotes from local pros for the same job.

FAQ

How much does a 12×12 deck cost?

About $3,600 to $7,200 for a standard deck, according to HomeGuide.

How much does deck railing cost?

About $20 to $60 per linear foot, depending on the material.

Do I need a permit to build a deck?

Most cities require one for attached or raised decks. Your builder should pull it.

Published national estimates, last checked 2026-11-12.

Decks & patios

Tell us about the job once. We match you with up to three local pros. No account, no fee, and your request is never resold.