Rancho Cucamonga, CA Accessory Structures: ADU Owner Occupancy (2026)

100. Subsection (C), captioned 'Owner Occupancy for JADUs,' requires the owner to reside in either the remaining portion of the primary dwelling or the newly created JADU, and waives that requirement only when the owner is another governmental agency, land trust, or housing organization. 070(B), must continue to live on the property, in either the main house or the new JADU itself; renting out both the main house and the JADU to tenants while the owner lives elsewhere is not permitted. The exemption for governmental agencies, land trusts, and housing organizations recognizes that those entities can hold title to affordable housing projects without a resident owner.

090 addresses JADU occupancy separately from the general ADU sale and rental standards in subsections (A) and (B). The rule works alongside the rental-term standard in subsection (B), which requires any ADU or JADU rental to run more than 30 consecutive days, reinforcing that JADUs are meant to house long-term residents on an owner-occupied lot rather than serve as investor-only units.