Grading & Drainage: Costa Mesa vs Santa Ana
How do grading & drainage rules compare between Costa Mesa, CA and Santa Ana, CA?
Costa Mesa and Santa Ana have similar restriction levels.
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 →Santa Ana, CA
Orange County
Santa Ana requires grading permits for earthwork and land-disturbing activities under its building and zoning codes. Projects must maintain existing drainage patterns and prevent adverse impacts on neighboring properties. Grading plans must be submitted for review by the Public Works department for projects exceeding certain thresholds.
View full Santa Ana rules →Key Facts Comparison
| Fact | Costa Mesa | Santa Ana |
|---|---|---|
| Grading Code | OC Article 8, Title 7 (adopted) | - |
| Permit Required | Most grading/excavation/fill | Grading permit from Public Works |
| Fill Exemption | <1 ft, <50 cu yd, <5:1 slope | - |
| Plans By | Licensed civil engineer | - |
| Contact | Development Services (714) 754-5245 | - |
| Plan Review | - | Grading and drainage plans required |
| Standard | - | Must maintain pre-development drainage |
| Authority | - | Public Works Agency |
Highlighted rows indicate differences between cities.
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.
Santa Ana FAQ
Do I need a grading permit in Santa Ana?
Yes, grading permits are required for earthwork and land-disturbing activities that exceed specified thresholds. Contact the Public Works Agency for specific requirements.
What drainage requirements apply to grading in Santa Ana?
Projects must maintain existing drainage patterns and prevent runoff from adversely affecting neighboring properties. A grading and drainage plan is required for review.
Compare other topics
See how Costa Mesa and Santa Ana compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool