Chicago, IL · 2026 cost guide
How much does a deck cost in Chicago?
In Chicago, a deck costs about $5,600–$22,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly $17.5–$69.98 per square foot. That’s about 8% above the Illinois average.
Estimate your Chicago project with the Deck Cost Calculator →
Chicago cost breakdown
| Chicago typical range | $5,600–$22,000 |
| Chicago per square foot | $17.5–$69.98 |
| Illinois state average | $5,200–$20,500 |
| Versus Illinois average | about 8% above average |
What’s different about Chicago
Chicago's strict permitting, unionized labor, and high cost of living make it Illinois's priciest market, with harsh freeze-thaw winters adding durability demands.
- Footings have to reach below the frost line, so deeper excavation adds cost.
- Permit fees and skilled-trade labor rates here run well above the national average — usually the single biggest cost driver.
How the cost is built
Deck cost depends on size, decking material (pressure-treated pine is cheapest; composite and PVC are mid-range; tropical hardwood is premium), and structural extras like railings, stairs, and elevated footings. Permits and ledger flashing add cost on attached decks.
Frequently asked questions
How much does a deck cost in Chicago?
In Chicago, a deck costs about $5,600 to $22,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly 17.5–69.98 per square foot. That's about 8% above the Illinois average, reflecting local labor and permit costs.
What affects the cost of a deck in Chicago?
Chicago's strict permitting, unionized labor, and high cost of living make it Illinois's priciest market, with harsh freeze-thaw winters adding durability demands. Footings have to reach below the frost line, so deeper excavation adds cost.
How can I get an accurate deck building estimate in Chicago?
Use the free Deck Cost Calculator to plug in your real measurements, then collect two or three local Chicago quotes to compare. Prices vary by neighborhood, access, and project complexity.
Deck building cost in other Illinois metros
Keep planning
Related calculators
Estimate wall area, siding squares, and boxes to order from footprint, stories, gables, and openings.
Open calculator →ConstructionFence CalculatorEstimate posts, rails, pickets, and concrete bags for a fence from its total length.
Open calculator →ConstructionConcrete CalculatorCalculate cubic yards of concrete and the number of bags for slabs, footings, and columns.
Open calculator →The Chicago figure scales the Illinois cost range by a local metro index, then adjusts for the city’s labor market and climate. A 2026 planning estimate, not a quote — get local bids. See our methodology.