San Mateo, CA Short-Term Rentals: Occupancy Limits (2026)
Key Facts
- Occupancy
- 2 per bedroom or 10 total (lower)
- Events
- Prohibited: no weddings/parties
- Un-hosted Cap
- 120 days per year
- Contact Person
- 24/7, respond within 60 min
- Code Reference
- SMMC §5.66.040
Summary
San Mateo limits STR occupancy to two people per bedroom or ten people per property, whichever is less, under Chapter 5.66. Events including weddings, parties, and corporate functions are prohibited at STR properties. Un-hosted rentals are limited to 120 days per year.
17920.3. Any building or portion thereof, regardless of zoning designation or approved uses of the building, including any dwelling unit, guestroom or suite of rooms, or the premises on which the same is located, in which there exists any of the following listed conditions to an extent that endangers the life, limb, health, property, safety, or welfare of the occupants of the building, nearby residents, or the public shall be deemed and hereby is declared to be a substandard building: (a) Inadequate sanitation shall include, but not be limited to, the following: (1) Lack of, or improper water closet, lavatory, or bathtub or shower in a dwelling unit.
Full Breakdown
The City of San Mateo's short-term rental ordinance (Chapter 5.66, Section 5.66.040) establishes strict occupancy limits. Occupancy is limited to two people per bedroom or ten people per property, whichever is less. This applies to overnight guests. Events including weddings, parties, corporate events, commercial functions, and any similar gatherings that could create neighborhood impacts are prohibited at STR properties. When the host is not present on-site, the property may be rented as an STR for no more than 120 days per year. Hosted stays (owner on premises) have no annual day limit. The local contact person must be available 24/7 and respond within 60 minutes to complaints.
Violations & Fines
Exceeding occupancy limits or hosting prohibited events may result in STR registration revocation. Violations of operating standards carry fines. Repeat violations may result in permanent loss of STR registration.
Frequently Asked Questions
How many guests can stay at my STR in San Mateo?
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Is there a limit on rental days?
Sources & Official References
Other rules in San Mateo
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Occupancy Limits in Nearby Cities
How other cities in San Mateo County handle occupancy limits.