Thousand Oaks, CA Accessory Structures: ADU Owner Occupancy (2026)
Key Facts
- Owner-occupancy applies to
- JADUs only, never standalone ADUs
- Trigger condition
- JADU shares sanitation with main house
- Exempt owners
- government agency, land trust, housing org
- Locked in by
- deed restriction, Ventura County Recorder
- Governing state law
- Cal. Gov. Code § 66333
- Enforcement remedy
- injunction or abatement of the JADU
- Enforcing department
- Community Development Department
Summary
Thousand Oaks imposes no owner-occupancy requirement on a standalone ADU at all. The rule bites only on a lot with a junior ADU (JADU): the owner must live in the primary home or the JADU, and only when the JADU shares a bathroom or kitchen with the main house.
(c) On a lot with a JADU, the property owner shall occupy either the primary dwelling or the JADU only when the JADU shares sanitation facilities with the primary dwelling, or when the owner is a governmental agency, land trust, or housing organization. When a JADU contains separate sanitation facilities, no owner-occupancy requirement shall apply, consistent with California Government Code Section 66333, as amended.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-78: 2026 S-78 Supplement contains: Current city legislation passed through March 31, 2026).
Full Breakdown
4506(c), a property owner must occupy either the primary dwelling or the JADU on that lot, but only when the JADU shares sanitation facilities with the primary dwelling, or when the owner is a governmental agency, land trust, or housing organization. If the JADU has its own separate bathroom, no owner-occupancy requirement applies at all, consistent with California Government Code Section 66333. 4512(c) requires this condition to be locked in by a deed restriction recorded with the Ventura County Recorder's Office at the property owner's expense before the JADU is approved; the recorded restriction must state the occupancy condition, disclose it to future buyers, and remain enforceable against later purchasers.
4502) makes clear that where City rules conflict with the state ADU statutes at Government Code Sections 66310-66342, the state law controls. 4503, without a discretionary hearing, so the owner-occupancy condition is set at the deed-restriction stage rather than through a case-by-case permit finding.
Violations & Fines
The JADU deed restriction is enforceable by the Community Development Department, or its designee, for the City's benefit. Failure to comply lets the City pursue legal action against the property owner and obtain any remedy available at law or equity, including an injunction stopping the illegal use of the JADU or abatement of the unit itself, under TOMC Section 9-4.4512(c)(5).
Frequently Asked Questions
Do I have to live on my property if I build an ADU in Thousand Oaks?
When does the JADU owner-occupancy rule not apply?
How is the JADU owner-occupancy requirement enforced?
Sources & Official References
Other rules in Thousand Oaks
California rules heatmap·Compare Thousand Oaks to another location·View the California accessory structures overview
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ADU Owner Occupancy in Nearby Cities
How other cities in Ventura County handle adu owner occupancy.