Home Daycare: San Mateo vs South San Francisco
How do home daycare rules compare between San Mateo, CA and South San Francisco, CA?
South San Francisco has fewer restrictions than San Mateo.
San Mateo, CA
San Mateo County
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.
View full San Mateo rules →South San Francisco, CA
San Mateo County
California H&S Code §1597.40-.45 preempts local restrictions on family daycare homes. Small (up to 8 children) and Large (up to 14) family daycares allowed BY RIGHT in all residential zones in unincorporated San Mateo County. State license required through CDSS.
View full South San Francisco rules →Key Facts Comparison
| Fact | San Mateo | South San Francisco |
|---|---|---|
| Small (1-8) | Permitted by right — all zones | - |
| Large (9-14) | Conditional use permit required | - |
| State License | CA CDSS Community Care Licensing | CDSS CCLD |
| Fire Clearance | SM Consolidated Fire | - |
| State Law | CA H&S Code §1597.45 | - |
| Small Daycare | - | Up to 8 children |
| Large Daycare | - | Up to 14 children |
| Zoning | - | By right, all residential |
| Preemption | - | H&S §1597.40+ |
Highlighted rows indicate differences between cities.
San Mateo FAQ
Can I run a daycare from my home in San Mateo?
Yes. Small family daycare (up to 8 children) is permitted by right in all residential zones under state law. You need a CDSS license and city business license.
Does the 5-client limit in home occupation apply?
No. Home daycare has separate state law authorization under H&S Code 1597.45 that overrides general home occupation limits.
What about large daycare?
Large family daycare (9-14 children) requires a conditional use permit from the city in addition to the state license.
South San Francisco FAQ
Who enforces daycare home rules in San Mateo County?
San Mateo County's code enforcement division is responsible for home business ordinances. You can report violations or request information through the San Mateo County government website or by calling the main municipal line.
What are typical penalties for violating daycare home rules?
Most San Mateo County home business violations start with a written warning followed by escalating civil fines for repeat offenses. Specific dollar amounts and any criminal-misdemeanor exposure depend on the section of code; consult San Mateo County's municipal code or staff for the current penalty schedule.
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