Tiny home rules in Bolingbrook, IL — covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds — determine where they are legal and how they get permitted.
Tiny homes on permanent foundations are treated as single-family dwellings under Will County LUO and IRC Appendix Q. Tiny homes on wheels classified as RVs under 625 ILCS 5 and generally cannot be used as permanent dwellings outside licensed RV parks.
Will County Land Use Ordinance and adopted 2018 IRC Appendix Q govern tiny houses on foundations (defined as dwellings 400 sq ft or less). Appendix Q provides relaxed standards for loft ceiling heights, stair dimensions, and egress. Tiny homes on foundation must meet all zoning district minimums: R-1 typically requires 1,200-1,600 sq ft minimum living area, R-2 requires 800-1,000 sq ft, meaning a true 400 sq ft tiny home is often only permitted in specific zones or as an ADU. Will County LUO §155-7.2 recently expanded ADU/second-unit provisions in certain districts following state interest but no state ADU preemption exists in Illinois. Tiny homes on wheels (THOW) are classified as recreational vehicles under 625 ILCS 5/1-169 and 625 ILCS 5/3-116, requiring title and registration as trailers. Under 210 ILCS 117 Mobile Home Park Act and municipal zoning, THOW cannot be permanent residences except in licensed mobile home parks. Joliet, Plainfield, and Bolingbrook generally prohibit THOW as residences in residential zones. Frankfort and New Lenox are similarly restrictive. Tiny home-friendly zoning does not yet exist in Will County; monitor Park Forest and other progressive Chicago-area municipalities for models.
Foundation tiny homes not meeting minimum sq ft: zoning variance required or denial. THOW used as residence: zoning violation, notice to vacate, $100-$1,000 fines per day continuing. Unpermitted construction: stop-work, removal. Septic/sewer connection violations: Will County Health Department enforcement with up to $1,000/day under 415 ILCS 5.
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Side-by-side rule comparisons with other cities in Will County.
See how Bolingbrook's tiny homes rules stack up against other locations.
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