ADU Permits: Rancho Cucamonga vs Rialto
How do adu permits rules compare between Rancho Cucamonga, CA and Rialto, CA?
Rancho Cucamonga, CA
San Bernardino County
No data available yet for Rancho Cucamonga.
Rialto, CA
San Bernardino County
ADU permits are issued by the Rialto Building & Safety Division (150 S Palm Ave). State law (Gov. Code §66317) requires the city to act on a complete ADU application within 60 days, ministerially, with no discretionary hearing. Plans must comply with the California Building Standards Code (effective 2025 edition as of Jan. 1, 2026) and RMC Title 15.
View full Rialto rules →Key Facts Comparison
| Fact | Rancho Cucamonga | Rialto |
|---|---|---|
| Permit issuer | - | Rialto Building & Safety Division |
| Address | - | 150 S Palm Avenue, Rialto, CA 92376 |
| Phone | - | (909) 820-2505 |
| Statutory review window | - | 60 days (Cal. Gov. Code §66317(b)) |
| Code edition | - | 2025 California Building Standards (effective Jan. 1, 2026) |
Highlighted rows indicate differences between cities.
Rancho Cucamonga FAQ
No FAQs available.
Rialto FAQ
How long does Rialto have to approve my ADU permit?
60 days from a complete application under Gov. Code §66317(b). If the city doesn't act, the permit is deemed approved.
Can I submit ADU plans online?
Yes. Rialto's Online Permit Center (OPC) accepts submittals — link your account through the Building & Safety Division page or apply at the counter (150 S Palm Ave, Mon-Fri 7 AM-6 PM).
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