Grading & Drainage: Fontana vs Hesperia
How do grading & drainage rules compare between Fontana, CA and Hesperia, CA?
Hesperia has fewer restrictions than Fontana.
Fontana, CA
San Bernardino County
Fontana grading and drainage follow FMC Title 15 and California Building Code Appendix J. Cut or fill over 50 cubic yards or hillside sites require a Building and Safety grading permit.
View full Fontana rules →Hesperia, CA
San Bernardino County
Hesperia enforces grading and drainage through HMC Title 15 (Buildings and Construction), which adopts the California Building Code (Title 24 CCR Part 2) effective January 1, 2023. California Building Code Appendix J (Grading) governs grading permits, cut/fill slope ratios, drainage terraces, and setbacks from property lines when adopted. Grading permits are issued by the Hesperia Engineering Department; drainage analysis must comply with the city's standard drainage requirements and Water Quality Management Plan (WQMP) post-construction BMPs.
View full Hesperia rules →Key Facts Comparison
| Fact | Fontana | Hesperia |
|---|---|---|
| Governing Code | FMC Title 15 + CBC App J | - |
| Permit Trigger | 50+ cubic yards | - |
| Soils Report | 3 ft cut/fill or more | - |
| Min Drainage Slope | 2% for 5 ft from foundation | - |
| Drainage Rerouting | Civil Code 3479 liability | - |
| Code basis | - | CBC 2022 Appendix J + HMC Title 15 (effective Jan 1, 2023) |
| Permit authority | - | Hesperia Engineering Department + Building & Safety Division |
| Default max slope | - | 2:1 (horizontal:vertical) per CBC Appendix J §J106-J107 |
| Drainage terrace trigger | - | Slopes >30 vertical feet require terraces every 30 ft (CBC §J109) |
Highlighted rows indicate differences between cities.
Fontana FAQ
Do I need a permit to regrade my Fontana backyard?
Under 50 cubic yards of cut or fill on a non-hillside lot is typically exempt. Always check with Fontana Building and Safety if work is near property lines or natural drainage.
Can my Fontana neighbor force me to redirect drainage?
If grading sends additional runoff onto their parcel, they can pursue a nuisance claim under Civil Code 3479 and Fontana may require corrective grading.
Hesperia FAQ
Do I need a grading permit for a small backyard re-grade?
Minor grading is generally exempt under CBC Appendix J §J103.2 (e.g., excavations less than 50 cubic yards on a single lot, less than 2 feet deep, not part of a building foundation). Larger grading, work near drainage courses, or work creating cuts/fills exceeding the §J103.2 thresholds requires a permit through the Hesperia Engineering Department.
Can my drainage discharge onto my neighbor's property?
No. Hesperia drainage review requires concentrated runoff to be discharged into an approved drainage system, not onto adjacent property. Doing so may also constitute a private nuisance under Cal. Civil Code §3479 and a violation of the city's drainage standards.
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