Sign Regulations in Monroe County, FL (2026)
3 rules for unincorporated Monroe County, Florida.
Verified from official government sources
Digital Billboards
In the unincorporated Florida Keys, electronic message centers and digital signs must display static, motionless messages only, with no video, flashing or audio, and are capped at 0.3 footcandles of brightness above ambient light. Land Development Code Section 142-8(b)(4) bans these digital displays outright in residential and low-intensity zoning districts, so they are confined to commercial areas along U.S. 1.
Digital and Electronic Message Sign Rules
Significant RestrictionsMonroe County Land Development Code §§ 142-6(f)(3), 142-8(b)(4)
(3)Electronic message centers and digital signs shall comply with the following:a.Electronic message centers and digital signs shall contain static, motionless messages only;b.Displaying any form of motion, or the optical illusion of movement, video or varying light intensity is prohibited; ... e.Brightness. Digital signs shall not operate at brightness levels of more than 0.3 foot candles abov...
Window Signs
Window signs in the unincorporated Florida Keys are capped at 35 percent of the glass surface and need no sign permit. Land Development Code Section 142-8(a)(12) sets that general coverage limit, while Section 142-7(b) adds a separate rule for temporary window signs: they must hang on the inside of the glass, stay under 35 percent coverage, and cannot be illuminated.
Window Sign Coverage Limits in the Keys
Light RestrictionsMonroe County Land Development Code §§ 142-7(b), 142-8(a)(12)
(b)A temporary sign displayed on a window surface must be displayed on the inside of the window surface, shall cover no more than 35 percent of the window surface, and shall not be illuminated. ... (12)Window signs. Window signs that collectively cover 35 percent or less of the window glass surface area. Note: The abovementioned business information and business affiliation signs shall be exclu...
Freeway-Facing Signs
The Florida Keys have no interstate freeway, so Monroe County's largest ground-mounted commercial signs are keyed to frontage on U.S. 1, the Overseas Highway. Land Development Code Section 142-8(c)(1)a sets a sliding scale by linear feet of U.S. 1 frontage, from 75 square feet per face on short lots up to 200 square feet per face and 400 square feet total on parcels with more than 301 feet of highway frontage.
U.S. 1 Frontage Sign Size Limits
Some RestrictionsMonroe County Land Development Code § 142-8(c)(1)a
a.One illuminated or non-illuminated, ground-mounted sign of a height not more than 24 feet shall be allowed for each frontage as indicated in the following table: ... Street Frontage (linear feet) Maximum Area Per Face (square feet) Total Face Area (square feet) Frontage on U.S. 1 or a frontage road adjacent to U.S. 1: 1 ft. to 150 ft. 75 sq. ft. 150 sq. ft. 151 ft. to 300 ft 100 sq. ft. 200 s...
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