Deck Cost Calculator

This free deck cost estimator prices your size, material, height and railing line by line. Adjusted for your state.

Prices reviewed September 2026
Adjusted for all 50 states
No sign-up to see your number

Step 1 of 4

Your deck

Size and height.

Where is the project?

Labor costs differ a lot by state. This adjusts every line.

Deck size

sq ft

A 12 × 16 deck is 192 sq ft. A 16 × 20 is 320.

80 sq ft1200 sq ft

Height off the ground

Estimated deck cost

$15,200

$10,200 – $20,100

How we calculate your deck cost

We price the project line by line: demolition, cabinetry or fixtures, finishes, labor, permits, and a contingency buffer. Every line has its own low and high unit price, so the range you see comes from real spread in the market, not a flat percentage. Labor is then adjusted by state, and materials move far less by location than labor does.

Unit prices are national benchmark ranges last reviewed September 2026. Treat the result as a planning number for setting a budget and judging contractor bids. It is not a quote. Read our full methodology.

What a deck estimate includes

Framing, footings and decking
Railing and stairs
Lighting (optional)
Old deck removal (optional)
Permit and inspection (optional)

What the deck estimate leaves out

Pergola, roof or screened enclosure
Built-in seating and planters
Grading or retaining walls
Furniture and grills

Deck cost FAQs

How much does it cost to build a deck?

Most decks cost roughly $25 to $70 per square foot. A 300 sq ft pressure-treated deck often lands between $10,000 and $20,000, and composite costs more.

Is composite worth the extra cost?

Composite costs more upfront but avoids sealing and staining, and often comes with 25+ year warranties, so it can cost less over the life of the deck.

Does the estimate include permits?

Yes, unless you turn the permit off. Most decks require a permit and inspection, especially raised ones.

Does height change the price?

Yes. Higher decks need taller posts, more bracing and more complex stairs, so cost per square foot rises.

What is the ROI of a deck addition?

Decks typically recoup a good share of their cost at resale, though the exact return varies by market and material. Treat resale value as a bonus, not the reason to build.

Read the deck cost guide