Grading & Drainage: Bonsall vs El Cajon
How do grading & drainage rules compare between Bonsall, CA and El Cajon, CA?
El Cajon has fewer restrictions than Bonsall.
Bonsall, CA
San Diego County
San Diego County's Grading Ordinance (Division 7) requires permits for significant grading and mandates proper drainage design. Grading permits needed for 200+ cubic yards or 8+ foot cuts/fills. Drainage must be directed away from structures and neighboring properties.
View full Bonsall rules →El Cajon, CA
San Diego County
Grading and drainage in El Cajon are regulated under ECMC Title 15 (Building & Construction) and Title 16 (Subdivisions). A grading permit is required for earthwork exceeding 50 cubic yards or affecting drainage patterns. Development must not increase stormwater runoff to adjacent properties.
View full El Cajon rules →Key Facts Comparison
| Fact | Bonsall | El Cajon |
|---|---|---|
| Permit Threshold | 200+ cubic yards or 8+ ft cuts/fills | 50+ cubic yards or 5+ ft cuts/fills |
| Drainage | Away from structures and neighbors | - |
| Plans Required | Licensed engineer for permit projects | - |
| Slopes | Specific angle and compaction standards | - |
| Ordinance | Division 7 — Grading, Clearing, Watercourses | - |
| Drainage Rule | - | Cannot increase runoff to neighbors |
| Floodway | - | Development generally prohibited |
| Code Reference | - | ECMC Titles 15 and 16 |
| Contact | - | Engineering — 619-441-1656 |
Highlighted rows indicate differences between cities.
Bonsall FAQ
Do I need a grading permit in San Diego County?
Yes, if your project involves moving more than 200 cubic yards of material or if cuts or fills exceed 8 feet in vertical height. Smaller projects may still need permits depending on slope and location.
Can I direct drainage onto my neighbor's property?
No. Drainage must be properly designed to not increase runoff onto neighboring properties. Altering natural drainage patterns that cause damage creates civil liability.
Who prepares grading plans?
Grading plans for projects requiring permits must be prepared by a licensed civil engineer registered in California. Plans must comply with the County's Grading Ordinance design standards.
El Cajon FAQ
Do I need a grading permit in El Cajon?
Yes, if the work exceeds 50 cubic yards, involves cuts or fills deeper than 5 feet, or alters natural drainage patterns. Contact the Engineering Department at 619-441-1656.
Can I redirect drainage on my property?
You may not redirect drainage in a way that increases runoff to adjacent properties. Drainage plans must be reviewed as part of the building or grading permit process.
Can I build in a floodway in El Cajon?
Generally no. The city's Flood Damage Prevention Ordinance prohibits most development within FEMA-designated floodways. Contact the Engineering Department for specific guidance.
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