ADU Permits: Fontana vs Hesperia
How do adu permits rules compare between Fontana, CA and Hesperia, CA?
Fontana and Hesperia have similar restriction levels.
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 →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 →Key Facts Comparison
| Fact | Fontana | Hesperia |
|---|---|---|
| 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 | - |
| 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.
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.
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.
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