El Cajon, CA Accessory Structures: ADU Owner Occupancy (2026)
Key Facts
- Applies to
- Junior ADUs with shared sanitation only
- Standard ADUs
- No owner-occupancy requirement
- Exempt owners
- Government agency, land trust, housing organization
- Recording
- Notice of restriction required before permit finalizes
- Penalty
- Non-compliance is cause for JADU removal
Summary
El Cajon does not impose an owner-occupancy requirement on standard accessory dwelling units, but § 17.140.180(F)(1) requires the property owner to live in either the primary home or the junior accessory dwelling unit whenever the two share common sanitation facilities, unless the owner is a government agency, land trust, or housing organization.
Owner Occupancy. The property owner must occupy either the primary dwelling unit or the junior accessory dwelling unit if there are common sanitation facilities, unless the property owner is a governmental agency, land trust, or housing organization. Should this requirement not be honored by the property owner, it will be cause to have the junior accessory dwelling unit removed in accordance with appropriate procedures.
Full Breakdown
180(F)(1), "Standards of Performance," the owner-occupancy rule applies specifically to junior accessory dwelling units (JADUs), the smaller unit type created within the walls of an existing single-family home. Whenever the JADU shares common sanitation facilities with the primary dwelling, the property owner must occupy either the main house or the JADU itself. The only exemptions are for owners that are a governmental agency, a land trust, or a housing organization. 180(E)(4): a JADU must be created within the existing walls of the primary dwelling, include independent exterior access, and contain an efficiency kitchen with a sink of at least a one-and-one-half-inch waste line, a cooking facility rated at 120 volts or more (or gas), and a food preparation counter and storage cabinets.
Regular attached or detached ADUs, by contrast, carry no owner-occupancy condition under this section. 180(F)(3)). 180(F)(4)). These standards were codified by Ord. 5142 (5/28/2024) and carried through Ord. 5148, Ord. 5151 and Ord. 5173.
Violations & Fines
Failing to honor the owner-occupancy requirement for a JADU is expressly cause to have the JADU removed under § 17.140.180(F)(1), "in accordance with appropriate procedures." A building permit for a JADU will not be finalized without proof that the recorded notice of restriction, which discloses the owner-occupancy and non-severability conditions, is on file per § 17.140.180(F)(2). Renting the unit for stays under the 30-day minimum term also violates § 17.140.180(F)(4).
Frequently Asked Questions
Do I have to live on-site if I build a JADU in El Cajon?
Does this owner-occupancy rule apply to a regular attached or detached ADU?
What happens if I stop occupying the property after building a JADU?
Sources & Official References
Other rules in El Cajon
California rules heatmap·Compare El Cajon to another location·View the California accessory structures overview
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How other cities in San Diego County handle adu owner occupancy.