Grading & Drainage: Midway City vs Newport Beach

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.

When do I need a grading permit in Newport Beach?

Grading permits are required for excavation or fill exceeding 50 cubic yards, cuts deeper than 5 feet, fills higher than 3 feet, or any grading on steep slopes. Contact the Building Division at (949) 644-3200 for specific thresholds.

Do I need a drainage plan for my Newport Beach project?

Yes. All development projects must include a drainage plan showing how stormwater will be managed on-site and directed to approved outlets. Plans must demonstrate no adverse impact on neighboring properties or public infrastructure.

Can I build a retaining wall without a permit?

Retaining walls up to 3 feet in height generally do not require a permit unless they support a surcharge load or are on a slope. Walls exceeding 3 feet require a building permit with structural engineering calculations.