What matters for project planning
The City of Joliet enacted a Stormwater Management Ordinance and is the permitting authority for land-disturbing and exterior work within city limits; the Community Development Department (150 W. Jefferson St., Joliet, IL 60432, (815) 724-4040) handles permits, and parts of Joliet sit within a mapped 100-year flood zone near the Des Plaines River. Will County separately maintains Chapter 55 (Stormwater Management) and Chapter 164 (Water Resource Ordinances) for unincorporated parts of the county. Because Joliet-area housing spans construction eras from the 1852-1873 East Side to postwar subdivisions and newer suburbs, current permit and drainage requirements should be confirmed before major exterior or envelope work begins.
Official sources
Verify the property, not just the city
Citywide context cannot establish a parcel’s flood zone, historic designation, permit requirements, soil conditions, or concealed construction. Confirm those items with the appropriate authority and selected provider before work begins.
Sources reviewed 2026-07-26. External requirements and maps can change.