Sign Regulations in San Mateo, CA (2026)
1 verified sign regulations for San Mateo, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Political Signs
Political signs in San Mateo are protected by the First Amendment and California Elections Code Section 18310. Signs on private property cannot be prohibited. Under state law, political signs may be posted up to 90 days before and must be removed within 10 days after an election.
San Mateo Political Sign Regulations
Some RestrictionsCal. Civil Code Sec. 4710 (HOA May Not Prohibit Noncommercial Signs)
4710. (a) The governing documents may not prohibit posting or displaying of noncommercial signs, posters, flags, or banners on or in a member's separate interest, except as required for the protection of public health or safety or if the posting or display would violate a local, state, or federal law. (b) For purposes of this section, a noncommercial sign, poster, flag, or banner may be made of...
Looking for San Mateo County county-wide rules?
County ordinances apply to unincorporated areas and may supplement San Mateo city rules.
Sign Regulations in San Mateo County →