Home Business in Union City, CA (2026)
4 verified home business rules for Union City, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Zoning & Home Occupation Permits
Union City allows home occupations in RS and RM residential districts as a permitted use, but caps them at 20% of dwelling floor area and bars use of garages or accessory structures for the business.
Union City Home Occupation Zoning Rules
Some RestrictionsUnion City Municipal Code § 18.32.020(G)(1)-(3)
Home occupations, subject to the following conditions: 1. That the home occupation shall be conducted within a primary or accessory dwelling unit by an inhabitant thereof and shall be clearly incidental to the use of the structure as a dwelling; 2. That the home occupation shall not be conducted in an accessory structure or in an attached garage; 3. That not more than 20% of the floor ...
Signage Rules
Union City limits home occupation signs to one and one-half square feet, requires natural illumination only, and mandates flat mounting against the dwelling's wall or window, with no permit needed if compliant.
Union City Home Occupation Sign Limit
Some RestrictionsUnion City Municipal Code § 18.30.040(I)
Home occupation signs advertising an approved home occupation conducted on the premises, provided that such sign shall be naturally illuminated, shall not exceed one and one-half (1-1/2) square feet in area, and shall be located flat against the wall or window of the dwelling. J. Building marker signs provided that the sign only includes the building name, date of construction, or historical...
Customer Traffic Restrictions
Home occupations in Union City cannot generate excessive pedestrian, auto, or truck traffic, and are limited to one vehicle, which must be parked in a garage, carport, or approved driveway when not in use.
Union City Home Business Traffic Rules
Some RestrictionsUnion City Municipal Code § 18.32.020(G)(10),(12)
That a maximum of one vehicle shall be associated with the home occupation. The vehicle associated with the home occupation shall be parked in an enclosed garage or under a designated carport when not in use. If the lot does not have a garage or carport, then the vehicle shall park in an approved driveway on the lot. … That the conduct of the home occupation shall not create excessive pedestria...
Home Daycare
Union City permits large family day care homes (9-14 children) by right in residential districts but requires an administrative use permit and 100-foot neighbor notice in single-family zones.
Large Family Day Care Home Rules Union City
Some RestrictionsUnion City Municipal Code § 18.32.020(P)
Large family child care homes in all areas zoned to allow single-family or multifamily residential uses subject to approval(s) from the State of California. Q. Duplexes on corner lots when constructed as part of the affordable housing obligation as provided in Chapter 18.33. Duplexes shall meet the front, rear and street side yard setback of the district in which they are located. Exceptions...
Looking for Alameda County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Union City city rules.
Home Business in Alameda County →