Accessory Structures in Simi Valley, CA (2026)
5 verified accessory structures rules for Simi Valley, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Simi Valley permits accessory dwelling units consistent with California ADU laws (Government Code 65852.2). ADUs up to 1,200 square feet are allowed on single-family lots with streamlined permitting and reduced fees.
Simi Valley ADU Rules and Permit Requirements
Some RestrictionsShed Rules
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.
Simi Valley Shed and Accessory Structure Rules
Few RestrictionsGarage Conversions
Simi Valley allows garage conversions to ADUs under California's streamlined ADU law. Converted garages are exempt from replacement parking requirements, but must meet building code standards for habitable space including insulation, ventilation, and egress.
Simi Valley Garage Conversion Regulations
Some RestrictionsCarport Rules
Simi Valley regulates carports as accessory structures under SVMC 9-30.080 (Table 3-2 setbacks; accessory structures may not cover more than 40 percent of any yard) and as covered parking under Chapter 9-34 (parking stall must be a clear 9 by 18 feet with no encroachment from posts). A building permit is required, and ADU-replacement carports must follow SVMC 9-44.160.
accessory-structures/carport-rules
Some RestrictionsTiny Homes
Tiny homes on foundations in Simi Valley are regulated as ADUs or standard dwellings and must meet California Building Code requirements. Tiny homes on wheels are classified as RVs and may not be used as permanent residences on residential lots.
Simi Valley Tiny Home Regulations
Some RestrictionsLooking for Ventura County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Simi Valley city rules.
Accessory Structures in Ventura County →