Westminster, CA Accessory Structures: ADU Rental Restrictions (2026)

135(I), titled 'ADUs as Transient Lodging,' sits among the general standards (subsections F through J) that follow the unit-specific development rules in Westminster's ADU ordinance. c, which repeats the same 30-day floor specifically for JADUs. Practically, this means an ADU or JADU owner cannot list the unit on a nightly or weekly booking platform; any tenancy must run 30 days or longer to be lawful. 74 of the Westminster Municipal Code, the short-term rental of residential dwelling units is prohibited within the city, so the ADU-specific 30-day floor is not an isolated restriction but part of a consistent citywide policy against transient residential rentals.

74 also defines a 'hosting platform' as any person or entity that facilitates a short-term rental for an owner and derives revenue from doing so, including booking fees, subscription charges, or advertising revenue, which extends exposure beyond the property owner to platforms that list a noncompliant ADU. Because the ADU-specific rule and the citywide rule both trace back to the same 30-day threshold, an owner cannot escape one by arguing the unit falls outside the other.