Shed permit rules in Simi Valley, CA — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Simi Valley exempts small sheds and accessory structures under 120 square feet from building permit requirements. Larger structures require permits and must comply with setback, height, and lot coverage standards in the Development Code.
Detached accessory structures (sheds, workshops, studios) under 120 square feet and under 10 feet in height are exempt from building permits in Simi Valley, consistent with California Building Code Section 105.2. These structures must still comply with zoning setbacks: typically 5 feet from side and rear property lines, and behind the front building line. Structures over 120 square feet require a building permit with plans showing foundation, materials, and compliance with the Development Code. Maximum height for accessory structures is generally 15 feet in residential zones. All accessory structures count toward the lot's maximum building coverage percentage. Structures may not be used for habitation, commercial activity, or storage of hazardous materials.
Unpermitted accessory structures over 120 square feet are subject to Code Enforcement action. Owners may need to obtain retroactive permits with double fees or remove the structure. Structures used for habitation or business without proper permits face enhanced enforcement.
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Side-by-side rule comparisons with other cities in Ventura County.
See how other cities in Ventura County handle shed rules.
See how Simi Valley's shed rules rules stack up against other locations.
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