DuPage County Parking Rules: Commercial Vehicle Restrictions Rules (2026)

The DuPage County Zoning Ordinance, codified as Chapter 37 of the Code of Ordinances, applies to unincorporated areas of the county. Article VII establishes the Residence Districts (R-1 through R-7) and uniformly limits how residential yards may be used. Under Sec. 37-7.4-1.h.8 (R-4) — and parallel paragraphs in Sec. 37-7.1, 37-7.2, 37-7.3, 37-7.5-1.k.8, 37-7.6-1.k.8, and 37-7.7-1.k.8 — "The storage of Household Accessory Equipment shall be in an enclosed structure." The Use-of-Yards rules at Sec. 37-7.4-4.c. (and the matching subsections of each other R district) provide that Front Yards and Corner Side Yards must be maintained only for site access, fire access, landscaping and fences; accessory off-street parking and on-site circulation are prohibited in front yards, corner side yards, interior side yards and rear yards (with narrow Sec. 37-7.4-7 exceptions for non-single-family uses). The Model Home conditional-use list (e.g. Sec. 37-7.4-2.j.5) reinforces the same baseline: "No outdoor storage of commercial vehicles, construction vehicles, equipment or supplies." Together these provisions bar a resident in unincorporated DuPage from parking work trucks, semi-tractors, dump trucks, construction trailers, box trucks or other commercial vehicles outdoors on a residential lot. Enforcement is by the DuPage County Building & Zoning Department (630-407-6700) through its Accela complaint portal. Incorporated villages and cities within DuPage (e.g. Naperville, Wheaton, Downers Grove) set their own commercial-vehicle parking rules and are not preempted by Chapter 37.