Home Business in San Mateo, CA (2026)
5 verified home business rules for San Mateo, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Zoning Restrictions
Home-based businesses in San Mateo require a Home Occupation Permit. The business must be incidental to the residential use with no exterior evidence, no non-resident employees, and no customer traffic beyond residential norms.
City of San Mateo Home Business Zoning
Some RestrictionsSignage Rules
No exterior business signage is permitted for home-based businesses in San Mateo residential zones. The home must retain its residential character with no commercial identification visible from the street.
City of San Mateo Home Business Signage
Some RestrictionsCustomer Traffic Restrictions
Customer visits to home businesses in San Mateo are restricted to incidental levels. No retail sales, regular appointments creating parking demand, or large commercial deliveries are permitted.
City of San Mateo Home Business Customer Traffic
Some RestrictionsCottage Food Operations
Cottage food operations in San Mateo are permitted under California's Homemade Food Act (AB 1616/AB 1266). Class A (direct sales) requires self-certification with San Mateo County. Class B (indirect sales to stores) requires a county health permit. Revenue is capped at $75,000 per year.
San Mateo Cottage Food Operations
Few RestrictionsHome Daycare
Small family daycare homes (up to 8 children) are permitted by right in all residential zones under California H&S Code Section 1597.45. Large family daycare homes (9-14 children) require a conditional use permit. All providers must be licensed by the California Department of Social Services.
San Mateo Home Daycare Regulations
Some RestrictionsCA Health and Safety Code § 1597.45
1597.45. (a) The use of a home as a small or large family daycare home shall be considered a residential use of property and a use by right for the purposes of all local ordinances, including, but not limited to, zoning ordinances. (b) A local jurisdiction shall not impose a business license, fee, or tax for the privilege of operating a small or large family daycare home. (c) Use of a home as a...
Looking for San Mateo County county-wide rules?
County ordinances apply to unincorporated areas and may supplement San Mateo city rules.
Home Business in San Mateo County →