Grading & Drainage: Anaheim vs Costa Mesa
How do grading & drainage rules compare between Anaheim, CA and Costa Mesa, CA?
Anaheim and Costa Mesa have similar restriction levels.
Anaheim, CA
Orange County
Anaheim requires grading permits under AMC Title 17 for earthwork exceeding minimum thresholds. The city's Storm Drainage Manual governs site drainage design for both public and private facilities.
View full Anaheim rules →Costa Mesa, CA
Orange County
Costa Mesa requires grading permits for most earth-moving activities and enforces drainage standards to prevent water from flowing onto neighboring properties. The city has adopted the Orange County Grading Manual with local modifications governing excavation, fill, and drainage requirements.
View full Costa Mesa rules →Key Facts Comparison
| Fact | Anaheim | Costa Mesa |
|---|---|---|
| Permit | Required for grading | - |
| Engineer | Licensed civil required | - |
| LID | Encouraged for runoff | - |
| Code | AMC Title 17 | - |
| Grading Code | - | OC Article 8, Title 7 (adopted) |
| Permit Required | - | Most grading/excavation/fill |
| Fill Exemption | - | <1 ft, <50 cu yd, <5:1 slope |
| Plans By | - | Licensed civil engineer |
| Contact | - | Development Services (714) 754-5245 |
Highlighted rows indicate differences between cities.
Anaheim FAQ
Do I need a grading permit in Anaheim?
Yes, for earthwork exceeding minimum thresholds. Plans must be prepared by a licensed civil engineer and approved by Public Works.
What drainage requirements apply to new development?
Projects must direct water away from structures into approved drainage systems. On-site detention may be required per the Storm Drainage Manual.
Costa Mesa FAQ
When do I need a grading permit in Costa Mesa?
Most grading, excavation, and fill operations require a grading permit. Minor fills less than one foot deep on gentle slopes under 50 cubic yards, and landscape planter fills less than three feet deep under 50 cubic yards, may be exempt if they do not obstruct drainage courses.
Can I change the drainage on my Costa Mesa property?
You must not alter grades in a way that causes water to flow onto neighboring lots. All grading must direct drainage away from buildings and toward approved drainage facilities. A grading plan prepared by a licensed civil engineer may be required.
What happens if I grade without a permit in Costa Mesa?
Grading without a permit can result in a stop-work order, double permit fees as a penalty, and administrative citations from Code Enforcement. Contact Development Services at (714) 754-5245 before starting any grading work.
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