Find licensed deck builders and contractors across Illinois. Browse 10 cities with license data and local permit requirements.
10
Cities Covered
$20-$50
Cost per Sq Ft
$83-$550
Permit Fees
Deck permits across Illinois are administered at the city or county level, and requirements vary between jurisdictions. In Chicago, the dominant building code in force is 2019 Chicago Building Code (Title 14B), based on the 2018 IBC with Chicago-specific amendments (effective August 1, 2020). No permit required for routine maintenance (painting, power washing). No permit required for non-structural repairs (deck boards, stair treads, railing pickets) if no building code violation exists. No permit required for residential porch repair/replacement if less than 6 feet off ground AND no more than 50 sq ft of landing area. That said, any deck that meets any one of the following usually requires a permit regardless of size: attached to the dwelling, over 30 inches above grade, covered with a roof, or serving a required exit door. Chicago processes residential plan reviews in express permit program (repairs/in-kind rebuilds): a few business days. standard plan review: 6-8 weeks. self-certified plans (by licensed architect/se): approximately 10 days.. Always verify current rules directly with your local building department before pulling in a contractor, because Illinois has no statewide fee schedule — every city sets its own.
Chicago
Pop. 2,746,388
Aurora
Pop. 180,542
Joliet
Pop. 150,362
Naperville
Pop. 149,540
Rockford
Pop. 148,655
Springfield
Pop. 114,394
Peoria
Pop. 113,150
Elgin
Pop. 112,456
Waukegan
Pop. 89,321
Champaign
Pop. 88,302
Average costs for a typical 300 sq ft deck with railing in Illinois.
| Material | Low | Average | High |
|---|---|---|---|
| Pressure-Treated Wood | $6,178 | $7,920 | $10,454 |
| Cedar | $8,580 | $11,000 | $14,520 |
| Composite (Trex, TimberTech) | $12,012 | $15,400 | $20,328 |
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