St. Clair County, IL Parking Rules: Driveway Rules (2026)

Unincorporated St. Clair County regulates driveway and yard parking through two overlapping chapters of its own code. Under Zoning Code Section 40-6-2, off-street parking spaces generally must be at least ten feet wide and twenty feet long with seven feet of vertical clearance, must sit entirely within the lot lines, and under subsection (F) cannot be placed inside any required yard abutting a street in the RR (Rural Residential), SR, MHP (Manufactured Home Park) or MR districts. Section 40-6-3(B) narrows this further for homes: parking accessory to a dwelling must be on the same lot as the dwelling, is barred from the front yard outright, and may only sit in the side or rear yard; multi-family spaces must stay unobstructed so no car has to be moved to let another out.

The Property Maintenance Code adds a surfacing rule that reaches every residential lot: Section 29-3-12 prohibits parking on any surface in a front or side yard that is not an "improved surface," defined as a base built to a depth sufficient to carry vehicle weight without deteriorating under load or weather; the definition specifically excludes a driveway itself, so gravel shoulders and lawn parking beside a paved drive still count as violations. Boats, travel trailers and utility trailers parked in yards fall instead under Zoning Section 40-5-2.

The Zoning Administrator's office handles zoning enforcement and permitting, while the code official handles Property Maintenance Code complaints; a property owner who disagrees with either determination may petition the Zoning Board of Appeals for a variance under Zoning Article 11. Every violation of the County Code, including these parking sections, carries the County's general penalty under Section 1-1-20: a fine of $75 to $750 per offense, with each additional day of noncompliance chargeable as a separate offense.