Lake County, IL Parking Rules: Commercial & Oversized Vehicles (2026)
Key Facts
- Max vehicle size
- 8 ft wide, 22 ft long
- Residential district limit
- 1 commercial vehicle outdoors
- AG zone limit
- 2 vehicles on 200,000+ sq ft lots
- Banned vehicle types
- Semis, dump trucks, diesel vehicles
- Applies to
- Unincorporated Lake County only
Summary
In unincorporated Lake County, residential-zoned properties can park only one commercial vehicle under eight feet wide and 22 feet long outdoors, while larger trucks and any diesel commercial vehicle are barred entirely.
Commercial vehicle parking. One vehicle, customarily used for commercial purposes, not to exceed eight feet in width and 22 feet in length, may be allowed to be parked outdoors as an accessory use to an existing residential use in Residential Zoning Districts. Two commercial vehicles, not to exceed eight feet in width and 22 feet in length, may be allowed to be parked outdoors in the Agricultural (AG) zone on parcels having 200,000 square feet or larger area as an accessory use to any principal permitted use.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-15: Supplement contains: Local legislation current through Ord. 26-0618, passed 6-9-2026 | State legislation current through ILCS Pamphlet 2025 #5).
Full Breakdown
Lake County Code § 151.146(N) caps outdoor commercial-vehicle parking in Residential Zoning Districts at one vehicle no larger than eight feet wide and 22 feet long, allowed only as an accessory use to an existing residential use. In the Agricultural (AG) zone, parcels of 200,000 square feet or more can keep two such vehicles. Semi-trailers, semi-trailer cabs, tow trucks, dump trucks, aerial ladders, bucket trucks, flat bed trucks, box trucks, and any diesel-engine commercial vehicle are barred outright from both Residential and Agricultural districts. The rule applies only to unincorporated Lake County: cities like Waukegan, Highland Park, and Libertyville set their own parking rules.
Violations & Fines
Violations bring stop-work orders, permit revocation, and administrative-adjudication penalties enforced by the Planning, Building and Development Director under §§ 151.253 and 94.50-94.66.
Frequently Asked Questions
Can I park a semi-trailer at my house in unincorporated Lake County?
Does this rule apply inside Waukegan or Highland Park?
Sources & Official References
Other rules in Lake County
Compare Lake County to another location·View the Illinois parking rules overview
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