Key Facts Full Breakdown Violations FAQ Sources

Ventura County, CA Environmental Rules: Grading & Drainage (2026)

Some Restrictions

Verified 1 month ago|Source: Ventura County Building & Safety →

Recently verified

Key Facts

Permit: Building & Safety grading permit
Hillside: Soils/geology reports required
Drainage: Must go to approved outlets
LID: Stormwater standards apply
Contact: (805) 654-2797

City-specific rules exist: Fillmore, Moorpark, Port Hueneme, Ventura, Oxnard, Santa Paula, Simi Valley, Thousand Oaks, and Camarillo have their own grading & drainage rules that differ from Ventura County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Summary

Grading in unincorporated Ventura County requires permits from Building & Safety for most excavation and fill work. Drainage must be directed to approved outlets — discharging concentrated runoff onto neighboring properties is prohibited.

Full Breakdown

The Ventura County Building Code requires grading permits for most excavation and fill operations. Exemptions may apply for small quantities on individual lots. Projects in hillside areas require soils and geology reports. All grading must comply with LID standards for stormwater management. Drainage cannot be redirected to damage neighboring properties. The Watershed Protection District oversees drainage infrastructure.

Violations & Fines

Grading without permits: building code violation with fines and retroactive fees. Altering drainage to damage neighbors creates civil liability and code violations.

Frequently Asked Questions

Do I need a grading permit?

Most excavation and fill work requires a permit from Building & Safety at (805) 654-2797. Small quantity exemptions may apply.

Can I change drainage on my property?

You cannot redirect concentrated runoff onto neighboring properties. Drainage changes may require a grading permit.

What about hillside grading?

Hillside projects typically require soils reports, geology reports, and geotechnical recommendations.

How does Ventura County compare?

See how Ventura County's grading & drainage rules stack up against other locations.

Compare to Another Location View California Overview

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.

Ventura County, CA Environmental Rules: Grading & Drainage (2026)

Key Facts

Summary

Full Breakdown

Violations & Fines

Frequently Asked Questions

Sources & Official References

Related Ventura County Ordinances

Noise Ordinances: Decibel Limits

Noise Ordinances: Quiet Hours

Noise Ordinances: Construction Hours

Parking Rules: Driveway Rules

Parking Rules: EV Charging

Parking Rules: Overnight Parking

More Environmental Rules in Ventura County

Grading & Drainage in Other Cities

How does Ventura County compare?

See something wrong?