St. Louis County, MO Home Business: Signage Rules (2026)

2(10) of the "R-1" Residence District regulations and repeated in every other R district (R-1A through R-8, R-6A, R-6AA). Two of the four conditions directly control signage and scale: there can be no freestanding or wall signage of any kind advertising the business, and there can be no outdoor storage tied to it. The other two conditions cap who can work there and what kind of business qualifies: every employee must reside on the premises, and any operation that meets the county's definition of an "e-commerce or delivery-only retail facility" is excluded from the home-occupation category entirely, regardless of signage.

168), which otherwise permits small identification and directional signs in residential districts; for a home occupation specifically, the general allowance does not apply and the sign ban is absolute. Losing any one of the four conditions, most commonly by installing a yard or door sign, converts the business from a lawful permitted use into an unauthorized commercial use in a residential zone. 070, the same body that interprets district boundary and use questions countywide. The current text was last amended by Ordinance No. 29528, Section 1, effective February 12, 2026.