Sign Regulations in Glenn County, CA (2026)
5 rules for unincorporated Glenn County, California.
Verified from official government sources
Political Signs
In unincorporated Glenn County, temporary political signs are exempt signs under Section 15.620.030(I) of the Unified Development Code. They may not exceed 4 square feet total per property in residential categories or 16 square feet in non-residential categories, and may be posted no more than 60 days before an election and must be removed within 14 days after.
Glenn County political sign rules
Light RestrictionsGlenn County Code Sec. 15.620.030(I)
Political Signs. Temporary political signs not exceeding four square feet total for each property in residential categories and sixteen square feet total for each property in nonresidential categories; provided, that campaign signs shall not be posted more than sixty days preceding the election, and shall be removed within fourteen days following the election;
Garage Sale Signs
Glenn County's Unified Development Code does not have a sign category specifically for garage or yard sale signs. Such temporary signs fall under the general Sign Standards of Chapter 15.620, which require the property owner's consent and prohibit signs in county road rights-of-way except by variance.
Glenn County garage sale sign rules
Some RestrictionsGlenn County Code Sec. 15.620.020(A)
No persons shall erect any sign regulated by this chapter without first obtaining the written consent of the property owner(s) upon which such sign is located and filing such written consent with the planning authority.
Digital Billboards
Unincorporated Glenn County bans any sign with moving, rotating, flashing or animated light or components in every zone under Code Section 15.62.040, which rules out digital and electronic billboard displays outright. The only carve-outs are time-and-temperature displays and barber poles, so an LED reader board cycling ads or messages does not qualify.
Glenn County Bans Flashing, Animated Signs
Heavy RestrictionsGlenn County Code § 15.62.040
The following signs and sign materials are prohibited in all zones: ... Signs consisting of any moving, rotating (exceeding eight rpm), flashing or otherwise animated light or component, except for time and temperature displays and barber poles;
Window Signs
A temporary window sign made of paper, cloth or similar expendable material is exempt from Glenn County's sign permit rules, but the total area of those signs cannot cover more than twenty-five percent of the window under Code Section 15.62.030. Go over that quarter-window limit and the display no longer qualifies for the exemption.
Glenn County Window Sign Coverage Limit
Light RestrictionsGlenn County Code § 15.62.030 (Window Signs)
Window Signs. Temporary window signs constructed of paper, cloth or similar expendable material; provided, the total area of such signs shall not exceed twenty-five percent of the window area.
Freeway-Facing Signs
An off-premises advertising structure, the kind of freeway-facing billboard that promotes a business not located on the sign's own parcel, needs a conditional use permit in unincorporated Glenn County and is only allowed at all in the RZ, AE, AP and M zones under Code Section 15.62.070. Outside those four zoning districts, no off-premises billboard is permitted.
Glenn County Off-Premises Billboard Permit Rule
Significant RestrictionsGlenn County Code § 15.62.070
Off-premises advertising structures may be permitted in the RZ, AE, AP C, and M zones only if a conditional use permit has first been secured.
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