Grading & Drainage: Chino vs Hesperia

Do I need a grading permit for a small backyard project?

If you're moving more than ~50 cubic yards of earth, disturbing more than 5,000 sq ft, or creating cuts/fills over a few feet in depth, yes. Smaller landscape regrading typically does not — but if drainage changes affect a neighbor, you can still face civil liability.

Can I drain my yard onto my neighbor's property?

No. Chino requires drainage plans to direct runoff to an approved outlet (street, storm drain, on-site detention). California Civil Code §831 and case law require 'reasonable use' of surface waters — you cannot concentrate or redirect runoff onto adjacent parcels.

Does Chino charge a drainage fee?

Yes. New development in master-planned areas pays drainage fees under the Drainage Master Plan financing program, which funds expansion of the city storm-drain system. Fees are calculated at building/grading permit issuance — contact Engineering at (909) 334-3253.

Who maintains the channel behind my house?

Master-planned channels like San Antonio Channel, Cypress Channel, and Chino Creek are typically San Bernardino County Flood Control District facilities. Smaller in-tract storm drains are city-maintained. Private drainage easements are the property owner's responsibility.

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.