Home Business in St. Clair County, IL (2026)
5 rules for unincorporated St. Clair County, Illinois.
Verified from official government sources
Zoning & Home Occupation Permits
In unincorporated St. Clair County a home occupation is a Special Accessory Use allowed in the A, RR, SR, and SR-MH districts. It must be clearly incidental to the home, use no more than 40% of the dwelling (or 400 sq ft of an accessory building), and cause no offsite
Home Business Zoning in Unincorporated St. Clair County
Some RestrictionsSt. Clair County Zoning Ordinance §40-5-9(A)(3)
The home occupation shall not utilize more than forty percent (40%) of the dwelling unit or a total of not more than four hundred (400) square feet in an accessory building including enclosed storage area.
Signage Rules
A home occupation in unincorporated St. Clair County cannot display any outside evidence of the business except a single nameplate no larger than one square foot, per Zoning Ordinance Sec. 40-5-9(A)(5). That nameplate still has to follow the county's general sign standards, which exempt only identification signs from the otherwise mandatory sign permit.
Home Business Sign Rules in St. Clair County
Some RestrictionsSt. Clair County Zoning Ordinance Sec. 40-5-9(A)(5)
(5) There shall be no display outside the building or any evidence of the home occupation except a nameplate not to exceed one (1) square foot in size which shall be in accordance with the provisions of identification signs.
Customer Traffic Restrictions
A home occupation in unincorporated St. Clair County cannot be open to the public before 8 a.m. or after 10 p.m., and it must provide off-street parking adequate for the traffic the business creates, per Zoning Ordinance Sec. 40-5-9(A)(7) and (10). Occasional telecommuting visits from clients do not need a permit at all.
Home Business Client Visit Rules in St. Clair County
Some RestrictionsSt. Clair County Zoning Ordinance Sec. 40-5-9(A)(7), (10), (E)
(7) The home occupation shall not be open to the public at times earlier than 8:00 a.m. nor later than 10:00 p.m. ... (10) A home occupation, including studios or rooms for instruction, shall provide off-street parking area adequate to accommodate needs created by the home occupation. ... (E) Activities Not Covered. No home occupation permit shall be required for activities such as telecommutin...
Cottage Food Operations
Illinois' Cottage Food law (410 ILCS 625/4) lets you produce many non-hazardous foods in your home kitchen for direct sale. You must register with your local health department, in St. Clair County, the St. Clair County Health Department, before selling.
Cottage Food (Home Kitchen) Sales
Some Restrictions410 ILCS 625/4(a)
"Cottage food operation" means an operation conducted by a person who produces or packages food or drink ... in a kitchen located in that person's primary domestic residence or another appropriately designed and equipped kitchen on a farm for direct sale by the owner, a family member, or employee.
Home Daycare
A day care or nursery school run out of an occupied residence in unincorporated St. Clair County is capped at five children beyond the operator's own kids, and the property must provide 50 square feet of indoor space and 100 square feet of fenced outdoor play area per child, per Zoning Ordinance Sec. 40-5-19.
Home Day Care Zoning Rules in St. Clair County
Some RestrictionsSt. Clair County Zoning Ordinance Sec. 40-5-19(C), (D)
(C) When nursery school or day care centers are conducted within an occupied residence, there shall be no more than five (5) children in addition to the children of the occupant. (D) Any nursery school/day care center shall comply with all other requirements of the Illinois Child Care Act of 1969 as amended (225 ILCS 10/11 et seq.)
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