ADU Owner Occupancy: Ontario vs Rialto
How do adu owner occupancy rules compare between Ontario, CA and Rialto, CA?
Ontario, CA
San Bernardino County
No data available yet for Ontario.
Rialto, CA
San Bernardino County
Rialto cannot impose an owner-occupancy requirement on ADUs permitted between Jan. 1, 2020 and Jan. 1, 2025 (Cal. Gov. Code §66314(a)(6)). Owner-occupancy is required for Junior ADUs (JADUs) under Cal. Gov. Code §66333 — owner must live in either the main house or the JADU.
View full Rialto rules →Key Facts Comparison
| Fact | Ontario | Rialto |
|---|---|---|
| ADU owner-occupancy | - | Cannot be required for permits issued Jan 2020-Jan 2025 (Cal. Gov. Code §66314(a)(6)) |
| JADU owner-occupancy | - | Required — owner must live in main house or JADU (Cal. Gov. Code §66333(a)) |
| Deed restriction | - | Required for JADUs only — filed before final inspection |
| After Jan. 1, 2025 | - | Cities may impose owner-occupancy on new ADU permits |
Highlighted rows indicate differences between cities.
Ontario FAQ
No FAQs available.
Rialto FAQ
Do I have to live in the main house to rent out my ADU?
Not for ADUs permitted between Jan. 1, 2020 and Jan. 1, 2025 — state law (§66314(a)(6)) prohibits Rialto from requiring it. For JADUs, owner-occupancy of the main house or JADU is always required under §66333.
Can I build a JADU as an investment property?
No. Cal. Gov. Code §66333 requires the property owner to live in either the JADU or the primary dwelling, and a deed restriction is recorded to enforce this.
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