Site Plan Requirements in Oxnard, CA (Permit Guide)

Frequently Asked Questions

Do I need a permit to build a shed in Oxnard, CA?

In Oxnard, detached accessory structures such as sheds generally require a building permit if the structure exceeds 120 square feet in floor area. Even smaller sheds may require a permit depending on how they are constructed and where they are located on the lot. You will need to submit a site plan showing the shed's location, its dimensions, and its distance from all property lines and existing structures. Sheds must comply with the setback requirements of your zoning district, which for rear and side yards in standard R-1 zones typically range from 5 to 15 feet. Contact the City of Oxnard Building and Safety Division at (805) 385-7925 to confirm requirements for your specific parcel before you begin construction.

How long does it take to get a building permit approved in Oxnard?

Permit approval timelines in Oxnard vary by project complexity. Simple projects such as water heater replacements or small accessory structures may qualify for over-the-counter review and can sometimes be approved the same day. Standard residential projects, including room additions, ADUs, and pool permits, typically go through a plan check process that takes 3 to 6 weeks for a first-round review in 2026. If the plan checker issues correction notices, each resubmittal round can add additional weeks. Projects in the Coastal Zone may take longer because they may also require review by the California Coastal Commission. Submitting a complete, accurate application and site plan from the start is the best way to minimize delays.

What does Oxnard require on a residential site plan?

Oxnard's Building and Safety Division expects a residential site plan to include the following elements: the lot boundaries with dimensions, a north arrow, a bar scale, the location and footprint of all existing structures on the property, the proposed structure or improvement clearly labeled, setback dimensions from all proposed and existing structures to each property line, any easements (utility, drainage, or access) that cross the property, driveways and walkways, and the street name(s) fronting the property. For ADU projects, the site plan should also show utility connection points and, where applicable, parking spaces. Flood zone properties must include finished floor elevation callouts. All dimensions should be clearly legible and consistent with the floor plans submitted alongside the site plan.

Can I draw my own site plan in Oxnard, or do I need a licensed surveyor?

For most standard residential projects in Oxnard, you are not required to hire a licensed land surveyor or civil engineer to prepare your site plan. Homeowners and contractors can draw their own site plans as long as they are accurate, drawn to scale, and include all required information. However, if your project involves grading, drainage work, or construction in a FEMA Special Flood Hazard Area, a licensed engineer may be required to stamp certain documents. For coastal zone projects, additional technical documentation may be needed. Online tools like Site Plan Creator make it straightforward for homeowners to produce professional-quality, scaled site plans without specialized drafting software, helping ensure your submittal meets Oxnard's formatting expectations.

What are the setback requirements for a single-family home in Oxnard?

In Oxnard's standard R-1 single-family residential zone, typical setback requirements are approximately 20 to 25 feet for the front yard, 5 feet for interior side yards, 10 feet for the street-side yard on corner lots, and 15 to 20 feet for the rear yard. Detached accessory structures and ADUs are often permitted with reduced setbacks, particularly at the rear of the lot. California state law sets a minimum of 4 feet for the rear and side setbacks of new detached ADUs. These figures can vary based on your specific zoning district, any applicable overlay zones, or specific plan requirements. Always verify your parcel's exact setbacks with the Oxnard Planning Division or by reviewing the Oxnard Municipal Code before finalizing your site plan.

Where do I submit a permit application in Oxnard, CA?

Permit applications in Oxnard can be submitted in person at the Development Services Counter located at Oxnard City Hall, 305 W. Third Street, Oxnard, CA 93030. The Building and Safety Division also offers online permit submission for certain project types through the city's permitting portal, which you can access at oxnard.org. In-person hours are typically Monday through Thursday and alternating Fridays, though you should confirm current hours on the city's website before visiting. For simple projects, over-the-counter review may be available the same day. Larger or more complex projects, including ADUs, additions, and pool permits, will be routed to the plan check queue and reviewed by staff over several weeks.

What happens if I build without a permit in Oxnard?

Building without a required permit in Oxnard can result in serious consequences. The city's Building and Safety Division has the authority to issue a stop-work order requiring all construction to halt immediately. You may be required to obtain a retroactive permit, which typically involves a higher fee (often double the standard permit fee) and may require exposing completed work for inspection. In some cases, unpermitted work must be demolished if it cannot be brought into code compliance. Unpermitted structures can also create problems when you sell your home, as they must be disclosed to buyers and may affect your property's appraised value or insurability. It is always safer and less costly to obtain the required permits before starting any project.

Do I need a Coastal Development Permit for my project in Oxnard?

If your property is located within the California Coastal Zone, which covers a significant portion of western Oxnard including areas near the beach, harbor, and Oxnard Shores, you may need a Coastal Development Permit (CDP) in addition to a standard building permit. The CDP requirement applies to a wide range of projects, including new construction, additions, fences, grading, and even some landscaping changes that could affect public access or coastal resources. CDPs are reviewed by the City of Oxnard's Planning Division under authority delegated by the California Coastal Commission. Processing times for CDPs can add several weeks or months to your project timeline. Check your parcel's coastal zone status with the Planning Division before submitting any permit application.

How much does it cost to get a building permit in Oxnard?

Building permit fees in Oxnard are based on the estimated valuation of your project and the type of work being performed. As of 2026, residential permit fees typically include a base building permit fee calculated from the project valuation, a plan check fee (often 65 to 85 percent of the building permit fee for projects requiring plan review), and various supplemental fees for energy compliance, school impact, and other assessments. A simple fence or small accessory structure permit may cost a few hundred dollars, while an ADU or room addition permit can run into the thousands. Exact fees are set by the city's fee schedule, which is updated periodically. Contact the Oxnard Building and Safety Division or visit oxnard.org for the current fee schedule before budgeting your project.

What are the ADU rules in Oxnard, CA in 2026?

As of 2026, Oxnard follows California's statewide ADU laws, which require the city to ministerially approve qualifying ADU and Junior ADU applications without discretionary review. Homeowners can build one detached ADU and one Junior ADU (JADU) on a single-family lot. New detached ADUs must maintain at least 4 feet of setback from the rear and side property lines. ADUs created by converting existing permitted space, such as a garage or basement, may have zero setback requirements. Maximum ADU size is generally 850 square feet for a studio or one-bedroom unit and up to 1,000 square feet for units with two or more bedrooms, though lot coverage limits may apply. A complete site plan is required as part of every ADU permit application in Oxnard.

How to Create a Site Plan in Oxnard

1. Confirm Your Permit Requirements: Before drawing anything, contact the City of Oxnard Building and Safety Division or visit oxnard.org to confirm whether your specific project requires a building permit and a site plan. Check whether your property is in the Coastal Zone or a FEMA flood zone, as these designations add review layers. Knowing the exact requirements upfront prevents wasted effort and ensures your application is complete from the start.
2. Gather Your Property Information: Collect your property's legal description, lot dimensions, and a copy of your assessor's parcel map from the Ventura County Assessor's office. Note the locations of all existing structures, easements, driveways, and utilities. If your property has been surveyed recently, locate those documents as well. Accurate input data is the foundation of a correct site plan and will prevent setback errors that trigger correction notices from Oxnard plan checkers.
3. Prepare Your Scaled Site Plan: Using your property data, create a scaled site plan that shows lot boundaries with dimensions, all existing structures, your proposed project with labeled dimensions, setback distances from all structures to property lines, easements, driveways, and a north arrow and scale bar. Tools like Site Plan Creator allow you to produce a professional, print-ready PDF that meets Oxnard Building and Safety Division formatting standards without requiring CAD software or a drafting background.
4. Submit Your Application to Oxnard: Submit your completed permit application, site plan, and any required supporting documents (floor plans, elevation drawings, energy calculations) to the Oxnard Development Services Counter at 305 W. Third Street, or through the city's online portal for eligible project types. Pay the required plan check fee at the time of submission. For simple projects, ask whether over-the-counter review is available to potentially receive same-day approval.
5. Respond to Plan Check Corrections: If the Oxnard plan checker issues a correction notice, review each comment carefully and revise your site plan and supporting documents accordingly. Common corrections involve setback dimensions, missing easement information, or lot coverage calculations. Resubmit your corrected documents promptly to keep your project moving. Each resubmittal round typically takes 2 to 3 additional weeks for re-review by city staff.
6. Obtain Permit and Schedule Inspections: Once your plans are approved, pay any remaining permit fees and receive your issued building permit. Post the permit on site as required and keep approved plans available for inspectors. Schedule all required inspections through the Oxnard Building and Safety Division as your project progresses, including foundation, framing, and final inspections. A final inspection and sign-off are required to close out your permit and legally establish the completed work.