Sign Regulations in Florissant, MO (2026)
4 verified sign regulations for Florissant, Missouri, sourced directly from the municipal code and official government pages.
Verified from official government sources
Garage Sale Signs
Florissant allows one on-site garage sale sign plus up to two directional signs, each capped at 6 square feet, but only for the day of an authorized sale. Every sign must come down by 5:00 p.m. that day, and the maximum fine is just $30, though a conviction blocks a new garage sale permit for two years.
Florissant Garage Sale Sign Placement Rules
Light RestrictionsFlorissant Code of Ordinances § 520.020(A)(12)
One (1) sign located on the property where the garage sale is held, and no more than two (2) other signs providing the address of the property, directional information and the name of the person(s) conducting the garage sale provided that such signs shall not exceed six (6) square feet in area advertising a garage sale that has been duly authorized under Section 405.085(A)(12) of the Zoning Cod...
Digital Billboards
Digital signs are flatly banned in Florissant's Historic District but permitted elsewhere in the city under Section 520.115, provided each image holds for at least 10 seconds and the display never animates, scrolls, flashes or fades. Signs must auto-dim with ambient light, and existing digital signs had 180 days from the 2019 ordinance to comply.
Florissant Digital Sign Display Rules
Some RestrictionsFlorissant Code of Ordinances § 520.115
Digital signs are prohibited in the Historic District but are otherwise permitted subject to the following limitations: ... Digital signs shall display static images for a period of at least ten (10) seconds before transitioning to another static image. ... Digital signs shall not include animation, full motion video, flashing, scrolling, strobing, racing, blinking, and changes in color, fade-i...
Window Signs
Florissant caps window signage at convenience businesses and package liquor stores: no more than 10% of the window may be obstructed by signs that block visibility into the store. The rule sits inside a security ordinance passed after a wave of late-night robberies and carries fines up to $500 or 90 days in jail.
Florissant Convenience Store Window Sign Limit
Some RestrictionsFlorissant Code of Ordinances § 210.2270
For purposes of this Section, the term "convenience business" means any place of business that is primarily engaged in the retail sale of groceries or both groceries and gasoline. ... For the protection of employees and the consumer public at late-night convenience businesses, every operator of a convenience business shall ensure that such operator's convenience business is equipped with the fo...
Freeway-Facing Signs
Billboards aimed at highway traffic in Florissant are capped at 30 feet above the highway's natural grade (50 feet above the sign's own installed grade) and must sit within 100 feet of a national-highway-system right-of-way. They also need 400-foot separation from residential zoning, 1,500 feet from any major interchange, and 500 feet from another billboard on the same side of the road.
Florissant Highway Billboard Setback Rules
Significant RestrictionsFlorissant Code of Ordinances § 520.280(E), (F), (H)
The maximum height of a standard outdoor advertising structure shall not exceed thirty (30) feet from the natural grade of the highway from which the sign is intended to be read or exceed fifty (50) feet above the natural grade where the sign is installed. ... Separation Requirements. No standard outdoor advertising structure shall be erected: ... Within ninety (90) feet of the property line of...
Looking for St. Louis County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Florissant city rules.
Sign Regulations in St. Louis County →