Siskiyou County, CA Accessory Structures: Carport Rules (2026)

Unincorporated Siskiyou County does not publish a dedicated carport ordinance. A carport is treated as a detached or attached accessory structure under the county Zoning Code in Title 10, Chapter 6, and must meet the height and setback standards of the parcel's zoning district, which the Planning Division administers beginning at Article 37. Whether a new carport requires a building permit is governed by the statewide California Building Code rather than a special county rule; structural roofed parking generally requires a building permit, while certain minor work may be exempt under California Building Code Section 105.2. Because much of the unincorporated county is rural residential and agricultural land with large parcels, off-street and covered parking is rarely constrained, but a carport still cannot encroach into a required yard setback or a road right-of-way. Carports used in connection with an ADU are also protected by State ADU law: under Government Code Section 66323, the county cannot require replacement parking when an existing carport is removed or converted as part of creating an ADU. For the exact setback and height standards that apply to a specific parcel, the county directs owners to submit a Property Information Inquiry to the Planning Division.