Shasta County, CA Accessory Structures: Shed & Carport Rules (2026)

17.88.140: Residential accessory buildings. A. Residential accessory buildings are buildings which are subordinate to and commonly associated with a residence, including, but not limited to: private garages, carports, covered awnings, greenhouses, and private storage buildings. As used in this section, residential accessory buildings include the terms 'residential accessory structure' and 'accessory structure.' This section does not apply to family care residences, accessory dwelling units, senior citizen residences, guest houses, servant's quarters, or any other buildings permitted and approved for human occupancy, or to agricultural buildings as defined in Section 17.02.105 and as permitted by Section 17.88.060. B. Residential accessory structures may be permitted in any district that permits a residence, unless otherwise specified by a particular district, provided that: 1. In districts which require an administrative or use permit for a residence, the administrative or use permit for the residence is issued; and 2. The accessory structure(s) comply with the following criteria and all required permits are approved: a. On property with a legally established residence, the combined total floor area of all such accessory structures, attached and detached, does not exceed two thousand five hundred square feet excluding six hundred square feet of garage space when attached to and part of the residence, and excluding up to two legal detached structures less than one hundred twenty square feet of floor area each, unless an administrative permit is first approved. b. On property where no legal residence has been established, accessory structures may be permitted, provided that an agreement is signed by the property owner and recorded prior to issuance of building permits, acknowledging that the accessory structures cannot and will not be used for human occupancy, or for any purpose in violation of the particular zone district or any other regulatory or prohibitory provision of the Shasta County Code; and further provided that: i. The combined total floor area of all accessory structures, including structures less than one hundred twenty square feet, shall not exceed one thousand square feet.