Grading & Drainage: Garden Grove vs Midway City

When do I need a grading permit in Garden Grove?

A grading permit is required when excavation or fill work exceeds approximately 50 cubic yards. Smaller projects may be exempt but must still maintain proper drainage. Contact Community Development at (714) 741-5312 to confirm your project requirements.

Can my grading project direct water onto a neighbor's property?

No. All grading must maintain proper drainage patterns and direct stormwater to approved outlets such as streets or storm drains. You cannot alter the grade of your property in a way that causes water to flow onto adjacent lots.

Do I need an engineer for grading work in Garden Grove?

Yes, grading plans for permitted projects must typically be prepared by a California-licensed civil engineer. The plans must show existing and proposed contours, drainage patterns, erosion controls, and any retaining wall details.

Do I need a grading permit in unincorporated Orange County?

Yes. Under OCCO §7-1-805, all grading, clearing, brushing, and grubbing activities require a grading permit from the Building Official. This includes excavation, fill placement, and earthwork on private property.

What drainage requirements apply to grading in unincorporated Orange County?

Drainage facilities must conform to Subarticle 11 of the OC Grading Manual. Finished surfaces must direct water away from structures toward approved drainage facilities, and precise grading plans must show drainage patterns and connections to the public storm drain system.