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Short-Term Rentals in San Mateo County, CA (2026)

4 county-level rules, plus city-specific rules for 4 cities in San Mateo County, California.

Verified from official government sources

Note: These county rules apply to unincorporated areas of San Mateo County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Short-Term Rental Permits

Anyone renting a home or room to guests for 30 days or less in unincorporated San Mateo County must register with the Tax Collector.

San Mateo County STR Tax Registration

Some Restrictions

San Mateo County Code § 5.136.050

Within thirty (30) days after the effective date of this chapter, or within thirty (30) days after commencing business, whichever is later, each operator of any hotel renting occupancy to transients shall register said hotel with the Tax Collector and obtain from him a "Transient Occupancy Registration Certificate" to be at all times posted in a conspicuous place on the Premises. Said certifica...

Short-Term Rental Parking Rules

Section 6401.3(6)(b) requires each single-family STR to provide at least one on-site parking space (garage, driveway, or other on-site area), or at least two spaces if maximum occupancy exceeds eight tenants. Multifamily STR units need at least one on-site space.

San Mateo County Short-Term Rental Parking Rules

Light Restrictions

Cal. Vehicle Code Sec. 22651 (Authority to Remove Parked or Abandoned Vehicles)

22651. A peace officer, as defined in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2 of the Penal Code, or a regularly employed and salaried employee who is engaged in directing traffic or enforcing parking laws and regulations of a city, county, or jurisdiction of a state agency in which a vehicle is located may remove a vehicle located within the territorial limits in which th...

Occupancy Limits

Under Zoning Regulations Section 6401.3(6)(a), the maximum number of short-term tenants is two persons per bedroom rented plus two additional persons. Children under 12 are not counted. Renting one bedroom allows up to four tenants.

San Mateo County Short-Term Rental Occupancy Limits

Some Restrictions

Cal. Health & Safety Code Sec. 17920.3 (Substandard Buildings - Occupancy and Habitability)

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 r...

Repeat Violator Strikes

San Mateo County treats short-term rental violations as strikes: once a permitted unit racks up more than two documented violations in any 12-month period, the Department of Planning and Building may suspend or revoke the permit under Zoning Regulations Section 8.368.040(1)(b), and a revoked owner is barred from reapplying for one year.

San Mateo County STR Repeat-Violator Rule

Some Restrictions

San Mateo County Zoning Regulations § 8.368.040(1)(b)

b) Penalties. Violation(s) of this Section may be subject to those penalties set forth in Chapter 1.40 of the Ordinance Code (Administrative Remedies), including monetary penalties as provided, in addition to the provisions for suspension or revocation of a permit as set forth in this Section. These penalties are not exclusive... If more than two (2) documented violations occur within any twelv...

Short-Term Rentals by City in San Mateo County

4 cities in San Mateo County have their own short-term rentals rules. Each link goes to that city's dedicated page with code citations.

All San Mateo County ordinances

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