Oxnard, CA Accessory Structures: ADU Permits (2026)

Oxnard's ADU framework is codified in City Code Chapter 16 (Zoning Code). Sec. 16-467 sets general standards for all ADUs and JADUs; Sec. 16-468 governs off-street parking. Approval is ministerial — no public hearing, no discretionary review — consistent with Cal. Gov. Code §65852.2(b). The Community Development Department's Planning and Environmental Services Division reviews zoning conformance, then the Building Division issues building, electrical, mechanical, and plumbing permits under the locally adopted California Building Standards Code (Title 24). Detached new-construction ADUs must observe a four-foot minimum side and rear setback (the City may not require more under §65852.2(c)(2)(D)). Detached ADUs are limited to 16 feet in height (with statutory exceptions allowing up to 18-25 feet under §65852.2(c)(1)(D) for two-story or transit-adjacent lots). Only one ADU is permitted on a lot developed with one residential use, per Sec. 16-467. Junior ADUs (JADUs) are capped at 500 square feet and must be created within the existing walls of the primary dwelling. The City must approve or deny a complete application within 60 days; denial requires a written list of every defect. Coastal Zone properties (west of US-101) follow additional Coastal Commission-certified procedures.