Martinez, CA Home Business: Signage Rules (2026)

Under Martinez Municipal Code Title 22, home occupation standards require that no exterior evidence of the business be visible from off the property. This means no signs of any size, no lighted displays, no merchandise visible through windows, and no vehicle lettering advertising the business parked overnight in view of the street. A single vehicle with commercial lettering may be parked on-site only if it is a personal-use vehicle and does not exceed passenger vehicle size. Magnetic signs and decals that identify a business are considered signage for this purpose. The only permissible identification is the standard street address. Martinez Sign Code (Title 22, Chapter 22.24) reinforces this by prohibiting commercial signage in residential zones except for limited real estate, political, and contractor signs with strict size and duration limits. Violations of signage rules are enforced through administrative citations starting at $100 for the first offense, $200 for the second, and $500 for subsequent violations, plus required sign removal. Violations are also grounds for home occupation permit revocation.