Grading & Drainage: Chino vs Rancho Cucamonga

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 permit to level my backyard?

Yes, if moving 50 cubic yards or more, or changing drainage patterns; smaller projects still must not redirect water onto neighbors.

Can I send my rainwater onto the neighbor's lot?

No, California Civil Code 3479 prohibits diverting runoff to create nuisance; drainage must go to approved outfalls.