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San Mateo County, CA Homelessness & Encampment Rules: Encampment Sanitation (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Governing chapter
Ordinance Code Ch. 3.109 (2024)
Warnings before citation
2 written warnings required
Removal notice
72 hours, absent exigent circumstances
Property storage
90 days at no cost
Scope
Unincorporated county public property only

Summary

Camping on public property in unincorporated San Mateo County is banned once an available shelter bed exists, backed by written-warning enforcement, a 72-hour removal notice, and 90-day storage of seized belongings.

City-specific rules exist: Redwood City has its own encampment sanitation rules that differ from San Mateo County's county-level regulations. If you live in Redwood City, check the city-specific page instead.

(a)When there is an available Shelter Location for a person, it is unlawful and a public nuisance for that Person to place, erect, configure, construct, or maintain an Encampment on public property anywhere in the unincorporated area of the County.(b)Section 3.109.030(a) shall not be enforced against any Person unless that Person has declined an offer of an available Shelter Location or otherwise has access to shelter or the means to obtain it.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 47).

Full Breakdown

Ordinance Code Chapter 3.109 makes it unlawful and a public nuisance to place, erect, configure, construct, or maintain an encampment on public property in the unincorporated county when an available Shelter Location exists, but the section cannot be enforced against anyone who has not declined a shelter offer. A person must get two written warnings before a citation; failing to vacate 24 hours after the second warning is a misdemeanor. Before removal, the County generally must give 72 hours' written notice, and seized personal effects are stored 90 days at no charge.

Violations & Fines

Camping when shelter is available and refused; failure to vacate within 24 hours of a second written warning is a misdemeanor prosecutable in Superior Court.

Frequently Asked Questions

Does this apply in Redwood City or San Mateo?
No. Chapter 3.109 governs only public property in the unincorporated county; incorporated cities enforce their own encampment rules.
Can the county clear a camp without offering shelter?
No. Enforcement is barred unless the person has declined an available shelter location or otherwise has access to shelter.

Sources & Official References

Other rules in San Mateo County

All San Mateo County rules

California rules heatmap·Compare San Mateo County to another location·View the California homelessness & encampment rules overview

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Encampment Sanitation in Cities Across San Mateo County