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

Lassen County's Zoning Code (Title 18) does not contain a standalone carport ordinance. A carport is treated as an accessory structure and is governed by the same district-based height and setback standards and general provisions (Chapter 18.108) that apply to other accessory buildings, plus a building permit under the California Building Code as adopted by the county. In the R-1 Single-Family Residential District, accessory structures are limited to 20 feet or the height of the main building, whichever is lower (with up to 35 feet possible on architectural-review approval). In agricultural districts such as A-2, larger setbacks apply to accessory buildings (for example, 20 feet from side/rear lines and 50 feet from the front line for guesthouses and farm outbuildings). Because a carport is open-sided, structural and wind-load review still applies, and placement must respect required yards and any easements. State ADU parking provisions can also affect carports: under California ADU law, a local agency generally cannot require replacement parking when a garage or carport is demolished or converted to build an ADU. Confirm setback, height, and permit requirements for your zoning district with Lassen County Planning and Building Services before installing a carport.