Laguna Niguel, CA Accessory Structures: ADU Rental Restrictions (2026)

Laguna Niguel's accessory dwelling unit ordinance, codified at Municipal Code § 9-1-35.26, lets homeowners build or convert an ADU or JADU under a ministerial permit process administered by the Community Development Department, but § 9-1-35.26(f)(4) caps how the finished unit can be used: rental terms of less than 30 days are prohibited outright, and the ban reaches back to cover ADUs and JADUs built before the rule was adopted, not just new construction. The section also blocks a workaround owners sometimes attempt with detached units: under § 9-1-35.26(f)(5), an ADU or JADU may be rented, but it may not be sold or otherwise conveyed separately from the lot and the primary dwelling, except in the narrow circumstances Government Code § 66341 allows, so the units cannot be split off as standalone investment or short-term-rental properties.

ADUs carry no owner-occupancy requirement, but JADUs generally do under § 9-1-35.26(f)(7)(b), tying the smaller unit to a resident owner even as the 30-day rental floor governs how either unit is leased out. A recorded deed restriction is required before a certificate of occupancy issues for a JADU under § 9-1-35.26(h)(8), and that restriction runs with the land, binding future owners to the same limits. Because the ADU and JADU permitting file sits with Community Development, the department can cross-check rental listings against approved permits when a complaint comes in, and the 30-day floor gives code enforcement a bright-line number rather than a case-by-case judgment call.