Cook County STR occupancy is limited by the property's residential building code capacity under Chapter 102 and applicable fire safety standards. The International Residential Code adopted by the county governs habitable space requirements.
Short-term rental occupancy in unincorporated Cook County is governed by the building codes adopted under Chapter 102, specifically the 2009 International Residential Code. Habitable space requirements determine maximum occupancy based on bedroom count and square footage. Fire safety codes require adequate egress for the number of occupants. STR operators must not exceed the safe occupancy determined by the property's layout and egress capacity. The Cook County Department of Building and Zoning enforces compliance and may inspect STR properties to verify safety standards. Overcrowding that creates health or safety hazards violates both building and fire codes.
Overcrowding: building code violation, $100–$1,000 fine. Fire safety violation: additional penalties. Operating without required egress: stop-occupancy order.
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