ADU Permits: Fontana vs Ontario
How do adu permits rules compare between Fontana, CA and Ontario, CA?
Fontana, CA
San Bernardino County
Fontana processes ADU and JADU applications ministerially under Fontana Municipal Code (FMC) Chapter 30 Article XII and California Government Code §65852.2 (as amended by AB 68, AB 881, and SB 13). The Fontana Planning Department and Building & Safety Division review permits with the state-mandated 60-day deadline. Detached ADUs are allowed up to 1,200 sq ft and JADUs up to 500 sq ft.
View full Fontana rules →Ontario, CA
San Bernardino County
No data available yet for Ontario.
Key Facts Comparison
| Fact | Fontana | Ontario |
|---|---|---|
| Code Section | FMC Ch. 30; Gov. Code §65852.2 | - |
| Review | Ministerial, 60-day cap | - |
| Detached Max | 1,200 sq ft | - |
| JADU Max | 500 sq ft | - |
| Setback | 4 ft side/rear | - |
Highlighted rows indicate differences between cities.
Fontana FAQ
How long does ADU review take in Fontana?
State law caps ministerial review at 60 days from a complete application, per California Government Code §65852.2. The Fontana Planning Department and Building & Safety Division process applications ministerially with only objective standards applied — no hearing, no discretionary findings.
Do I need a public hearing for a Fontana ADU?
No. California Gov. Code §65852.2 and the Fontana ADU regulations require ministerial review only — no Planning Commission hearing, no neighbor notice, no discretionary findings. Only objective standards apply.
Ontario FAQ
No FAQs available.
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