El Monte, CA Accessory Structures: ADU Owner Occupancy (2026)

Section 17.110.030.R imposes an owner-occupancy condition specifically on junior ADUs, the smaller unit type capped at 500 square feet and built entirely within the existing or proposed primary dwelling under subsection E.1. Either the existing primary dwelling or the junior ADU on the lot must be occupied by the property owner, unless the owner is a governmental agency, land trust, or housing organization. The city enforces this by requiring the owner to sign and record a covenant against the property affirming that the primary dwelling or junior ADU will be owner-occupied; because the covenant is recorded, it runs with the land and binds future buyers, not just the owner who first builds the junior ADU.

This owner-occupancy rule is narrower than it might first appear: it applies only to junior ADUs, not to standard attached or detached ADUs elsewhere in Section 17.110.030, which carry no such occupancy condition. The distinction matters because a property owner planning to rent out both the main house and an accessory unit without living on-site can build a detached or attached ADU under subsections E.2 and E.3 without triggering subsection R, but cannot do the same with a junior ADU while renting out the primary residence to a different household.

The chapter implements California Government Code Sections 65852.2 and 65852.22 under Section 17.110.030.A, and the city processes ADU and junior ADU applications ministerially, without discretionary review, within 60 days under subsection B.1.