Alameda County, CA Short-Term Rentals: Occupancy Limits (2026)
Key Facts
- Numeric STR cap
- Not set in county code
- Building code
- Egress and alarm requirements apply
- Common formula
- 2 per bedroom plus 2 (industry norm)
- Nuisance rules
- Apply to over-occupancy impacts
- Events and parties
- Additional restrictions may apply
Summary
Unincorporated Alameda County does not set an STR-specific occupancy cap but enforces building code, fire code, and nuisance rules that effectively limit total guests based on bedrooms and egress.
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:
Full Breakdown
Short-term rentals in unincorporated Alameda County are not subject to a single numeric occupancy cap in the county code, but several overlapping rules control the practical maximum number of guests. The California Building Code and Residential Code require adequate sleeping room size, egress windows, and smoke and carbon monoxide alarm coverage. The California Fire Code limits occupancy based on exits and available paths of travel. A common industry benchmark is two guests per bedroom plus two additional guests, with a hard ceiling tied to the number of legal bedrooms on the property record. Occupancy that creates noise, traffic, parking, or sanitation impacts beyond a typical single-family use can be abated as a nuisance under county ordinance. Hosts should post an occupancy limit in house rules, refuse bookings exceeding it, and keep documentation of bedroom counts and alarm compliance. Overnight and daytime guest counts for events are treated separately and may be further restricted by nuisance and noise rules.
Frequently Asked Questions
Can I rent a sofa bed as a bedroom?
Are party-sized bookings allowed?
Sources & Official References
Other rules in Alameda County
California rules heatmap·Compare Alameda County to another location·View the California short-term rentals overview
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