Deck Cost Per Square Foot by Region

Per-square-foot pricing is the fastest way to sanity-check a deck quote. But the national average hides a big spread: the same 12×16 composite deck that costs $8,300 in the rural Midwest can run $12,500 in coastal California. Here's how the numbers move by region — and why.

National baseline: installed cost per square foot (2026)

Apply your own square footage in the deck cost per square foot calculator.

Regional multipliers

Why the spread is so wide

• Labor. Carpentry crews bill $45–$65/hour in the South and $85–$120/hour in major coastal metros. Labor is a third of the job, so this alone moves totals 15%.
• Frost depth. A 12-inch Florida footing takes minutes. A 48-inch Minnesota footing means more concrete, more excavation, and often a machine on site.
• Permits and inspections. $75 in one county, $600 plus two inspections in the next. See the deck permit guide.
• Corrosion and wind rules. Coastal builds require stainless or heavily coated hardware and hurricane ties, adding $300–$900 on a mid-size deck.
• Freight. Composite ships from a handful of plants; the farther you are, the more freight rides in the board price.

Size changes your per-square-foot number too

Stairs, railings, permits, and crew mobilization are largely fixed. Spread across 100 square feet they're brutal; across 400 square feet they nearly disappear. Typical composite pricing:

How to use per-square-foot pricing without getting burned

1. Start with the national number for your material.
2. Apply your regional multiplier from the table above.
3. Adjust for size — small decks cost more per foot.
4. Add fixed extras: demolition, elevated framing, upgraded railing, electrical.
5. Confirm with a real takeoff in the deck material calculator, then compare three local bids.

Any bid more than 20% above your adjusted number deserves an itemized breakdown before you sign. Walk through the full process in how to estimate a deck.