ADU Permits: Hesperia vs Ontario
How do adu permits rules compare between Hesperia, CA and Ontario, CA?
Hesperia, CA
San Bernardino County
Hesperia's Development Services Department issues ADU permits ministerially under HMC 16.12.360. California Gov. Code 66317 mandates approval or denial of a complete ADU application within 60 days (the Hesperia ordinance still references the older 120-day window).
View full Hesperia rules →Ontario, CA
San Bernardino County
No data available yet for Ontario.
Key Facts Comparison
| Fact | Hesperia | Ontario |
|---|---|---|
| Permitting Department | Development Services Department | - |
| Review Timeline (State) | 60 days (Cal. Gov. Code 66317) | - |
| Review Timeline (Local Text) | 120 days per HMC 16.12.360 (preempted by state) | - |
| Hearing Required | No - ministerial approval only | - |
| City Hall Phone | (760) 947-1200 | - |
Highlighted rows indicate differences between cities.
Hesperia FAQ
How long does Hesperia have to approve an ADU permit?
60 days from a complete application under California Gov. Code 66317. Hesperia's local text still says 120 days, but state law preempts and the city must act within 60 days or the permit is deemed approved.
Do I need a public hearing for an ADU in Hesperia?
No. ADUs that comply with HMC 16.12.360 are approved ministerially by Development Services with no Planning Commission hearing or discretionary review.
Ontario FAQ
No FAQs available.
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