ADU Owner Occupancy: Castro Valley vs Fremont
How do adu owner occupancy rules compare between Castro Valley, CA and Fremont, CA?
Castro Valley, CA
Alameda County
No data available yet for Castro Valley.
Fremont, CA
Alameda County
Under FMC 18.190.005 and California Government Code 65852.2(a)(8), Fremont does NOT require owner-occupancy for standard ADUs permitted between January 1, 2020 and December 31, 2024. Owner-occupancy is required only for Junior ADUs (JADUs) under Gov. Code 65852.22, with a recorded deed restriction.
View full Fremont rules →Key Facts Comparison
| Fact | Castro Valley | Fremont |
|---|---|---|
| Standard ADU | - | No owner-occupancy required |
| JADU Rule | - | Owner must live in primary OR JADU |
| State Authority | - | Gov. Code 65852.2(a)(8); 65852.22 |
| JADU Deed Restriction | - | Recorded with Alameda County |
| Occupancy Limit | - | Same as single-family home |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
No FAQs available.
Fremont FAQ
Does Fremont require me to live on-site if I build an ADU?
No, not for a standard ADU. California Government Code 65852.2(a)(8) preempts owner-occupancy rules, and FMC 18.190.005 has not adopted such a requirement. The only exception is a Junior ADU - under Gov. Code 65852.22 the owner must occupy either the primary house or the JADU.
Can I rent out both my Fremont house and my ADU?
Yes for a standard ADU - state law allows renting both units as long as each rental is 30 days or longer. For a JADU, the recorded deed restriction requires you to live in either the primary house or the JADU and prohibits any rental of either unit for less than 30 days.
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