ADU Impact Fees: Oxnard vs Simi Valley
How do adu impact fees rules compare between Oxnard, CA and Simi Valley, CA?
Oxnard, CA
Ventura County
Oxnard cannot impose impact fees on any ADU under 750 square feet — an absolute prohibition under Cal. Gov. Code §65852.2(f)(3)(A). ADUs of 750 sf or larger pay impact fees proportional in square footage to the primary dwelling. Building permit fees, plan-check fees, and school facilities fees on ADUs of 500 sf or larger (under Cal. Ed. Code §17620) still apply.
View full Oxnard rules →Simi Valley, CA
Ventura County
No data available yet for Simi Valley.
Key Facts Comparison
| Fact | Oxnard | Simi Valley |
|---|---|---|
| Governing Law | Cal. Gov. Code §65852.2(f)(3) | - |
| Under 750 sf | No impact fees - absolute waiver | - |
| 750+ sf | Proportional to primary dwelling | - |
| School Fees | Apply to ADUs >=500 sf (Ed. Code §17620) | - |
| Collected By | Oxnard Building Division | - |
Highlighted rows indicate differences between cities.
Oxnard FAQ
Will I pay impact fees on a small Oxnard ADU?
No. Cal. Gov. Code §65852.2(f)(3)(A) prohibits Oxnard from charging impact, connection, or capacity fees on any ADU under 750 sf. Plan-check and building permit fees based on construction valuation still apply, as do school facilities fees for ADUs at or above 500 sf.
What if my Oxnard ADU is 1,000 sf?
Cal. Gov. Code §65852.2(f)(3)(B) caps the impact fee at an amount proportional in square footage to the primary dwelling's impact fee. The City cannot charge a flat ADU fee — it must be size-proportional. School fees still apply at the Level 1 rate under Cal. Ed. Code §17620.
Simi Valley FAQ
No FAQs available.
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