There is no separate short-term rental registry in St. Clair County. Unincorporated rentals register through the county's Occupancy Program, which requires an occupancy permit and inspection valid one year. Municipalities may run their own rental registrations.
Illinois does not require statewide STR registration, and St. Clair County does not maintain a dedicated short-term rental registry. The functional registration for unincorporated rental housing is the county Occupancy Program: before a new tenant or occupant moves in, the property must pass an occupancy inspection and the occupant applies for an occupancy certificate. That inspection is valid for one year. Municipalities such as Belleville and O'Fallon may operate their own rental-registration or landlord-licensing programs, so hosts inside city limits should register with the city rather than the county.
Failing to obtain an occupancy certificate before occupancy is a code violation; the Building & Zoning Department withholds approval until the inspection passes and the $35 certificate fee is paid.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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