Alameda County prohibits most on-premises signage for home occupations in residential zones; the business must not advertise its presence with exterior signs, window displays, or lighted signs under Title 17.
Under Alameda County zoning rules governing home occupations in unincorporated areas, exterior signage advertising a home-based business is generally prohibited in residential zones. A home occupation must not change the outward appearance of the dwelling or otherwise indicate from the street that a business is being conducted on the premises. This means no illuminated signs, no window lettering or graphics identifying the business, no sandwich boards, no flags, and no banners. The intent is to preserve the residential character of the neighborhood. Small address numbers and standard mailbox labeling remain permitted. Agricultural zones and some mixed-use parcels may allow a small identification sign subject to the size and placement limits in the county sign regulations. Operators advertising online or through vehicle wraps should confirm that parked commercial vehicles comply with any residential parking standards.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Alameda County.
See how other cities in Alameda County handle signage rules.
See how Castro Valley's signage rules rules stack up against other locations.
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