Lake Elsinore, CA Accessory Structures: ADU Owner Occupancy (2026)

Owner-occupancy attaches specifically to junior accessory dwelling units in Lake Elsinore, not to full-size ADUs. Section 17.415.110(C)(5)(b) states that the owner of the lot proposed for the junior accessory dwelling unit must occupy, as a principal residence, either the primary unit or the JADU itself; the City exempts this requirement only when the owner is another government agency, land trust, or housing organization, tracking the exemption built into Government Code § 65852.22. The same subsection ties occupancy to the JADU's physical form: it must be created within the existing walls of the existing primary unit, must have its own independent exterior entrance separate from the primary unit's main entrance, and the interior doorway connecting the two units must be maintained even though it may include a second door for sound attenuation.

Subsection (C)(5)(l) reinforces the requirement from the utilities side: the JADU or primary residence must be occupied by the owner of record, and the City withholds the building permit until the applicant supplies a will-serve letter from the local water and sewer provider, or health-officer approval if a private sewage system is used instead. Because full ADUs created under subsection (C)(4) carry no comparable owner-occupancy condition, a property owner who wants to rent out both the primary home and the accessory unit without living on-site must build a standard ADU rather than a JADU.