Garage Sale Signs: San Mateo vs South San Francisco
How do garage sale signs rules compare between San Mateo, CA and South San Francisco, CA?
San Mateo and South San Francisco have similar restriction levels.
San Mateo, CA
San Mateo County
Garage sale signs in San Mateo must comply with Chapter 25 of the sign code. Signs may not be placed on public property or utility poles. Temporary signs must be removed after the sale ends.
View full San Mateo rules →South San Francisco, CA
San Mateo County
Unincorporated San Mateo County permits temporary garage sale signs under Zoning Regulations §6408. Signs limited to 4 sq ft, posted only during the sale, and prohibited on utility poles or public rights-of-way. Maximum 2 sales per household per year typical.
View full South San Francisco rules →Key Facts Comparison
| Fact | San Mateo | South San Francisco |
|---|---|---|
| Code Reference | SMMC Chapter 25 | - |
| Public Property | Signs prohibited | - |
| Utility Poles | Signs prohibited | Prohibited |
| Removal | Promptly after sale ends | - |
| Enforcement | Code Enforcement — 650-522-7200 | - |
| Size Limit | - | 4 sq ft max |
| Posting Window | - | 24 hrs before/after |
| Sales Per Year | - | 2 per household typical |
| Code | - | Zoning Regs §6408 |
Highlighted rows indicate differences between cities.
San Mateo FAQ
Can I put garage sale signs on the sidewalk?
No. Signs cannot be placed on public property including sidewalks, utility poles, and traffic signs.
Do I have to remove signs after the sale?
Yes. All advertising signs must be removed promptly after the sale ends.
South San Francisco FAQ
Who enforces garage sale signs rules in San Mateo County?
San Mateo County's code enforcement division is responsible for signs 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 garage sale signs rules?
Most San Mateo County signs 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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