Political signs in the City of Sonoma are regulated under Sonoma Municipal Code (SMC) §18.12.090(L) and may not be posted on public property under SMC §18.28.036. California Penal Code §556.1 requires owner consent before placing any sign on private property.
The City of Sonoma regulates political signs through Title 18 (Signs and Display Advertising) of the Sonoma Municipal Code. Political signs are addressed specifically in SMC §18.12.090(L). SMC §18.28.036 prohibits posting any sign or advertisement in a public place, including curbstones, lamp posts, utility poles, hydrants, bridges, walls, fences, trees, sidewalks, streets and alleys. Per California Penal Code §556.1, no sign may be placed on private property without prior consent of the owner. The City of Sonoma references these provisions in its election guidance, and the Sonoma County Registrar of Voters publishes a Campaign Posters and Sign Placements guide that compiles the applicable state and local rules for candidates operating in the city and broader county.
Title 18 violations are subject to abatement and enforcement under SMC Chapter 18.44. Signs posted in prohibited public locations may be removed by the City. Violations of California Penal Code §556.1 (posting signs on private property without consent) are an infraction under state law. Sonoma uses an administrative citation process through Code Enforcement for unresolved sign violations.
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