Short-Term Rentals in Castro Valley, CA (2026)
4 verified short-term rentals rules for Castro Valley, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Permit Requirements
Castro Valley STRs operate under Alameda County rules. There is no dedicated STR ordinance, but Chapter 6.64 (Rental Housing Registry) requires registration of rental units in the unincorporated area, and operators must obtain a Transient Occupancy Tax certificate before listing.
Castro Valley Short-Term Rental Registration
Some RestrictionsOccupancy Limits
Castro Valley STRs have no dedicated occupancy cap, but the unit must comply with California Building Code occupancy standards and Alameda County zoning use limits for the underlying single-family or multi-family district.
Castro Valley STR Occupancy Limits
Some RestrictionsLooking for Alameda County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Castro Valley city rules.
Short-Term Rentals in Alameda County →