What matters for project planning
The City of Waukegan's Engineering Department requires a Watershed Development Ordinance (WDO) permit for regulated development and work in the floodplain or floodway, per Lake County's Watershed Development Ordinance as adopted in City Ordinance Section 18-10. Because Waukegan's lakefront terrain includes ravines and mapped flood hazard areas, parcel-specific floodplain status and permit requirements should be confirmed with the city before foundation, grading, or exterior work begins.
Official sources
Verify the property, not just the city
Citywide facts can't establish what applies to your specific parcel -- flood zone, historic status, permits, soil, or concealed conditions. Confirm those with the City of Waukegan and your provider ahead of time.
Reviewed on 2026-07-26 -- official maps and permitting rules change periodically, so confirm current details before relying on them.