ADU Impact Fees: Fontana vs Ontario
How do adu impact fees rules compare between Fontana, CA and Ontario, CA?
Fontana, CA
San Bernardino County
Fontana exempts ADUs under 750 square feet from all impact fees per California Government Code §65852.2(f)(3). ADUs 750 sq ft or larger pay impact fees proportionate to the principal dwelling's square footage. School district fees are governed by SB 13 (2019). Standard building permit and plan-check fees still apply through the Building & Safety Division fee schedule.
View full Fontana rules →Ontario, CA
San Bernardino County
No data available yet for Ontario.
Key Facts Comparison
| Fact | Fontana | Ontario |
|---|---|---|
| Under 750 sq ft | All impact fees waived | - |
| 750+ sq ft | Proportional to principal dwelling | - |
| State Law | Gov. Code §65852.2(f) | - |
| School Fees | Proportional under SB 13 | - |
| Water/Sewer Tap | Waived when sharing service | - |
Highlighted rows indicate differences between cities.
Fontana FAQ
Are ADU impact fees waived in Fontana?
Yes for ADUs under 750 sq ft — all local impact fees are waived by California Gov. Code §65852.2(f)(3). ADUs 750 sq ft or larger pay proportionally based on the principal dwelling's size, not the full single-family rate.
What ADU costs still apply in Fontana?
Standard building permit fees based on construction valuation, plan-check fees, and utility service fees from the Fontana Water Company or local sewer agency if a new meter is needed. Property taxes will reassess on the added square footage through the San Bernardino County Assessor.
Ontario FAQ
No FAQs available.
Compare other topics
See how Fontana and Ontario compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool