Home Business in O'Fallon, MO (2026)
4 verified home business rules for O'Fallon, Missouri, sourced directly from the municipal code and official government pages.
Verified from official government sources
Zoning & Home Occupation Permits
O'Fallon allows home based businesses in any dwelling, but Section 400.280 caps the operation at 25% of the home's floor area, never more than 500 square feet, requires a valid occupancy permit, and demands registration with the City before opening.
O'Fallon Home Occupation Zoning Standards
Some RestrictionsO'Fallon Code § 400-280(D)(1), (3)
Any structure where a home based business is to be operated shall have a valid occupancy permit. ... Home based businesses shall be operated entirely within an enclosed structure and shall not occupy more than twenty-five percent (25%) of the total floor area of the main residential building, and in no case more than five hundred (500) square feet of floor area, with use of the dwelling for a h...
Signage Rules
O'Fallon caps home occupation signage at one sign per lot, under two square feet in area, per Section 410.120(A)(18) of the sign code, and lets residents put it up without a permit as long as the underlying business is a lawful home occupation.
O'Fallon Home Occupation Sign Limit
Light RestrictionsO'Fallon Code § 410-120(A)(18)
Home Occupations. Any property owner operating a permitted home occupation or other commercial use permitted in a residentially zoned area (unless otherwise noted), may have one (1) sign, not to exceed two (2) square feet in area, per lot. These signs may be placed without a permit.
Customer Traffic Restrictions
O'Fallon lets a registered home based business receive customers and third parties, but Section 400.280(D) requires the operator to stagger their arrivals and provide off-street parking on site rather than let visitors show up all at once or park on the street, which the code itself labels a nuisance.
O'Fallon Home Business Client Traffic Rules
Some RestrictionsO'Fallon Code § 400-280(D)(11)-(12)
Parking generated by the conduct of a home based business shall be provided on the property and off-street on an approved surface. The residential property must have sufficient on-site (off-street) parking available for all residents of the structure and all employees and customers for the home based business. Use of the streets for parking shall constitute a nuisance. ... The home based busine...
Home Daycare
O'Fallon's Zoning Code treats any place that cares for children four or more hours a day as a 'daycare center,' whether or not it operates for profit. That definition sweeps in home-based child care, so Appendix A to the Zoning Code requires a conditional use permit before a daycare center use can open in any residential zoning district, R-1 through R-5.
O'Fallon Home Daycare Requires a Conditional Use Permit
Significant RestrictionsO'Fallon Code § 400.035 (Zoning Code Definitions)
DAYCARE CENTER, CHILD: A place which provides shelter and personal care to children who are not related within the third degree computed according to civil law to the operator, for four (4) or more hours of any part of twenty-four (24) hour day, whether such place be organized or operated for profit or not. The term "daycare center" includes child care facility, kindergarten, nurseries or any o...
Looking for St. Charles County county-wide rules?
County ordinances apply to unincorporated areas and may supplement O'Fallon city rules.
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