Oxnard ADU Zoning Rules & Permit Guide

ADU Regulations in Oxnard, California

Updated September 29, 2026

On the Ventura County coastline, Oxnard applies California's statewide ADU standards with additional coastal zone considerations. The California Coastal Commission may require a coastal development permit alongside the standard building permit.

Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Oxnard as of 2026. Regulations are governed by California's AB 68 (2020), AB 881 (2021), and AB 3182 (2024) which together establish a statewide ADU framework.

Additional Local Requirements for Oxnard

• Coastal zone design review may apply
• Minimum 150 sq ft
• Height limit: 16 ft detached
• ADU by right on most lots

Frequently Asked Questions About ADUs in Oxnard

Can I build an ADU in Oxnard?

Oxnard permits ADUs per state law. If your property is in the coastal zone, additional Coastal Commission review may be needed.

What is the maximum ADU size allowed in Oxnard?

ADUs in Oxnard can be up to 1,200 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Oxnard planning department before designing your project.

What are the setback requirements for an ADU in Oxnard?

ADUs in Oxnard generally require setbacks of 4 ft rear, 4 ft side. California state law (AB 68) limits local setback requirements to 4 feet for existing structures, but always verify with local zoning.