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

070(H), which reads: the accessory dwelling unit may be occupied without occupancy limitations, but if rented, such rental shall be for a period greater than thirty days. That single sentence functions as Rialto's short-term rental ban for ADUs specifically; it does not reference or incorporate the city's separate short-term rental permitting rules that apply to primary homes, because ADUs are excluded from that program entirely. A property owner who wants to list an accessory dwelling unit on a nightly or weekly booking platform cannot do so under this section, since any stay shorter than thirty-one days falls outside the permitted rental term.

The restriction applies whether the ADU is attached, detached, or a converted garage under subsection K, and it applies equally to junior accessory dwelling units through subsection H's owner-occupancy clause. Because the section caps ADU size at the greater of fifty percent of the primary unit or eight hundred fifty square feet under subsection P, and requires ministerial approval within sixty days of a complete application under subsection D, the thirty-day rental floor is one of the few substantive limits Rialto places on how an approved ADU can be used once built. 070 and fielding complaints about noncompliant short-term use.