Sign Regulations in Longmont, CO (2026)
3 verified sign regulations for Longmont, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
Holiday Displays
Longmont's sign code flatly prohibits inflatable signs -- balloons, inflatable figures, and similar fluttering or revolving devices -- with no seasonal or temporary-permit exception, unlike pennants and windsocks.
Longmont Ban on Inflatable Signs
Heavy RestrictionsLongmont Municipal Code § 15.06.030.B.2
The following signs are prohibited unless otherwise stated in this chapter: A.Distracting, interfering or confusing signs.1.Signs that cause visual obstruction or interfere with motor vehicle traffic or a traffic control device, including any sign that obstructs clear vision in any direction from any street intersection or driveway.2.Signs employing a lighting or control mechanism that cause...
Digital Billboards
Longmont allows digital/electronic message signs only as part of a freestanding monument sign in specific mixed-use and industrial zoning districts, capped at half the sign area, static messages only, held at least 15 seconds.
Longmont Electronic Message Sign Rules
Significant RestrictionsLongmont Municipal Code § 15.06.050.L
Electronic message signs are allowed pursuant to the following:1.Shall only be allowed as part of a freestanding monument sign and only in the MU-N, MU-C, MU-E, MU-R, N-PE and N-PF zoning districts;2.The electronic message portion shall not exceed 50 percent of the allowed monument sign area;3.Only static electronic messages are allowed; and4.Each electronic message shall remain on the screen f...
Window Signs
Longmont exempts window signs from a sign permit, but caps them at 25% of a window opening, or 50% of any single panel if the window is divided into multiple panels.
Longmont Window Sign Coverage Limit
Light RestrictionsLongmont Municipal Code § 15.06.020.D
D.Window signs. Window signs are allowed and are exempt from the sign permit requirement, provided window signage does not cover more than 25 percent of a window opening or 50 percent of any one window panel if a window opening contains multiple window panels.E.Signs located inside a building. Signs located inside a building are allowed and are exempt from the sign permit requirement provided a...
Looking for Boulder County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Longmont city rules.
Sign Regulations in Boulder County →