Florissant, MO Sign Regulations: Digital Billboards (2026)
Key Facts
- Governing section
- Florissant Code § 520.115, adopted 2019
- Historic District
- Digital signs prohibited
- Minimum image hold
- 10 seconds before transition
- Brightness cap
- 0.3 foot-candles above ambient light
- Compliance window
- 180 days for pre-existing signs
Summary
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.
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-in or fade-out in any manner imitating movement or any other means not providing constant illumination. ... Digital signs shall come equipped with automatic dimming technology which adjusts the sign's brightness in direct correlation with ambient light conditions, not exceeding 0.3 foot candles about ambient light as measured using a foot candle (Lux) meter at a present distance depending on sign area, measured as the square root of the product of the sign area (sq. ft.) times one hundred (100). ... All Digital signs previously installed prior to this Section shall come into compliance with the regulations set forth herein within one hundred eighty (180) days from the adoption of such regulations.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4989395; v43 updated 2026-05-26; through 05-26-2026).
Full Breakdown
Adopted by Ord. No. 115 is Florissant's dedicated digital sign ordinance. It opens by prohibiting digital signs outright in the "H" Historic District (Old Town), while allowing them elsewhere in the city subject to a detailed set of technical limits. Each static image must display for at least 10 seconds before the sign transitions to the next image, and the code separately bans animation, full motion video, flashing, scrolling, strobing, racing, blinking and any color change, fade-in or fade-out that imitates movement or otherwise breaks constant illumination.
Frame transitions are limited to a single one-second black frame effect. 3 foot-candles above ambient light as measured with a foot-candle (Lux) meter at a distance keyed to the sign's area, using the formula the square root of the sign area in square feet times 100. Each line of copy or graphics must be at least 5 inches tall, and factory settings must conform to the City's Digital Sign Code. Digital signs installed before the ordinance took effect had 180 days from adoption to come into compliance with all of these standards.
Violations & Fines
A digital sign that transitions faster than every 10 seconds, uses animation, scrolling, flashing or fade effects, lacks automatic ambient-light dimming, or sits in the Historic District violates Section 520.115 and is treated as an unlawful sign under Chapter 520, subjecting the owner to the Building Commissioner's removal order and the sign chapter's general penalty and enforcement provisions.
Frequently Asked Questions
Are digital billboards allowed anywhere in Florissant?
How fast can images change on a digital sign in Florissant?
Does Florissant regulate how bright a digital sign can be at night?
Sources & Official References
Other rules in Florissant
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