ADU Regulations in Oxnard, California (2026)

Regulations at a glance

Local rules & notes

Coastal Zone Exclusion: ADUs are strictly prohibited in the Oxnard Coastal Zone, defined as the area between Victoria Avenue and the Pacific Ocean. Specific Floor Elevation Requirement: The finished floor of the ADU must be at least 25 inches above the lowest adjacent street gutter, measured per Public Works Plate 601. Excessive Review Fee: The city imposes a significant hourly penalty for projects requiring more than two rounds of plan review. Structural Calculation Waiver: Single-story ADUs using standard Type V wood framing do not require stamped structural calculations if they follow prescriptive codes.

For the official ordinance and latest updates, check your city or county planning department.

Frequently asked questions about ADU regulations in Oxnard

• What is the maximum ADU size in Oxnard, California?

  In Oxnard, the maximum ADU size is typically 1200 square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; Oxnard may follow state defaults or have local limits. Verify with Oxnard planning for your specific lot.

• What are the setback requirements for ADUs in Oxnard?

  In Oxnard, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Oxnard planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Oxnard?

  In Oxnard, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with Oxnard or county planning for your zone.

• Is ADU approval ministerial in Oxnard?

  In Oxnard, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; Oxnard planning can confirm the exact process.

• Are there parking requirements for ADUs in Oxnard?

  In Oxnard, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Oxnard planning for your address.