Solano County, CA Sign Regulations: Political Signs (2026)

Solano County's sign regulations (Chapter 28, Section 28.96) apply to all signs in the unincorporated areas of the County. Campaign signs - defined in the code as a sign advertising support of or opposition to a candidate or proposition for a public election - are addressed under temporary signs in Section 28.96.70(D). The code states campaign signs are allowed without a sign permit provided that the signs: (a) may be installed on private property with the property owner's consent for up to 60 days prior to an election; (b) shall not exceed 12 square feet in area within residential zoning districts and 32 square feet in area within nonresidential zoning districts; and (c) shall be removed within seven days following the election. The code generally prohibits off-premises signs except in narrow listed cases, and pole or freestanding signs over six feet, so political signs should stay on private property within these limits. Note that courts have limited governments' ability to restrict the timing and content of political signs; the County's durational limits exist in the code, but property owners retain strong free-speech protections. Signs in the public right-of-way are not permitted. For specifics, contact the Planning Division (707-784-6765).