California Backyard Office & Shed Permit Rules by County
Below is a county-by-county guide explaining the general permit rules and the relevant department to contact.
Do I Need a Permit to Build a Backyard Office or Shed in Alameda County, California?
Rule: Building permits are required for structures over 120 square feet or for any building with utilities.
Contact: Alameda County Planning Department or Building & Safety Division
Do I Need a Permit to Build a Backyard Office or Shed in Alpine County, California?
Rule: Permits are required for sheds and backyard offices larger than 120 square feet or with utilities.
Contact: Alpine County Building Safety Division
Do I Need a Permit to Build a Backyard Office or Shed in Amador County, California?
Rule: Structures over 120 square feet or with plumbing or electrical require permits.
Contact: Amador County Building Department
Do I Need a Permit to Build a Backyard Office or Shed in Butte County, California?
Rule: Detached accessory structures 120 square feet or larger, or any with utilities, require permits.
Contact: Butte County Development Services Department – Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Calaveras County, California?
Rule: Structures under 120 square feet may be exempt. Larger or utility-connected structures require permits.
Contact: Calaveras County Building Department
Do I Need a Permit to Build a Backyard Office or Shed in Colusa County, California?
Rule: Permits are required for sheds or backyard offices over 120 square feet or with utilities.
Contact: Colusa County Community Development Department
Do I Need a Permit to Build a Backyard Office or Shed in Contra Costa County, California?
Rule: Permits required for structures over 120 square feet or with utilities.
Contact: Contra Costa County Building Inspection Division
Do I Need a Permit to Build a Backyard Office or Shed in Del Norte County, California?
Rule: Small storage sheds may be exempt. Backyard offices typically require permits.
Contact: Del Norte County Community Development Department
Do I Need a Permit to Build a Backyard Office or Shed in El Dorado County, California?
Rule: Backyard offices and structures over 120 square feet require permits.
Contact: El Dorado County Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Fresno County, California?
Rule: Accessory buildings exceeding 120 square feet or including utilities require permits.
Contact: Fresno County Department of Public Works and Planning – Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Glenn County, California?
Rule: Permits required for structures over 120 square feet or with utilities.
Contact: Glenn County Planning & Community Development Department
Do I Need a Permit to Build a Backyard Office or Shed in Humboldt County, California?
Rule: Backyard offices usually require permits, especially with utilities and insulation.
Contact: Humboldt County Planning and Building Department
Do I Need a Permit to Build a Backyard Office or Shed in Imperial County, California?
Rule: Permits required for structures exceeding 120 square feet or with utilities.
Contact: Imperial County Planning & Development Services Department
Do I Need a Permit to Build a Backyard Office or Shed in Inyo County, California?
Rule: Detached sheds under 120 square feet may be exempt. Offices generally require permits.
Contact: Inyo County Building & Safety Division
Do I Need a Permit to Build a Backyard Office or Shed in Kern County, California?
Rule: Permits required for structures larger than 120 square feet or with utilities.
Contact: Kern County Planning and Natural Resources Department – Building Inspection Division
Do I Need a Permit to Build a Backyard Office or Shed in Kings County, California?
Rule: Permits required for sheds and backyard offices over 120 square feet.
Contact: Kings County Community Development Agency – Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Lake County, California?
Rule: Structures over 120 square feet or with utilities require permits.
Contact: Lake County Community Development Department
Do I Need a Permit to Build a Backyard Office or Shed in Lassen County, California?
Rule: Permits required for accessory structures exceeding 120 square feet.
Contact: Lassen County Planning and Building Services
Do I Need a Permit to Build a Backyard Office or Shed in Los Angeles County, California?
Rule: Most backyard offices require permits, especially with power, insulation, or plumbing.
Contact: Los Angeles County Department of Public Works – Building and Safety
Do I Need a Permit to Build a Backyard Office or Shed in Madera County, California?
Rule: Permits required for larger sheds and all backyard offices.
Contact: Madera County Building, Safety and Planning Department
Do I Need a Permit to Build a Backyard Office or Shed in Marin County, California?
Rule: Most backyard offices require permits due to zoning regulations.
Contact: Marin County Community Development Agency – Building and Safety Division
Do I Need a Permit to Build a Backyard Office or Shed in Mendocino County, California?
Rule: Permits required for structures over 120 square feet.
Contact: Mendocino County Building and Planning Services
Do I Need a Permit to Build a Backyard Office or Shed in Merced County, California?
Rule: Permits required for backyard offices and utility-connected sheds.
Contact: Merced County Department of Community and Economic Development
Do I Need a Permit to Build a Backyard Office or Shed in Modoc County, California?
Rule: Structures over 120 square feet require permits.
Contact: Modoc County Planning Department
Do I Need a Permit to Build a Backyard Office or Shed in Mono County, California?
Rule: Backyard offices usually require permits due to zoning and environmental controls.
Contact: Mono County Community Development Department – Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Monterey County, California?
Rule: Permits required for backyard offices and larger sheds.
Contact: Monterey County Resource Management Agency – Building Services
Do I Need a Permit to Build a Backyard Office or Shed in Napa County, California?
Rule: Backyard offices typically require permits due to strict land use controls.
Contact: Napa County Planning, Building and Environmental Services Department
Do I Need a Permit to Build a Backyard Office or Shed in Nevada County, California?
Rule: Permits required for accessory buildings over 120 square feet.
Contact: Nevada County Building Department
Do I Need a Permit to Build a Backyard Office or Shed in Orange County, California?
Rule: Permits required for backyard offices and structures with utilities.
Contact: Orange County Planning Department or local city Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Placer County, California?
Rule: Structures exceeding 120 square feet require permits.
Contact: Placer County Building Services Division
Do I Need a Permit to Build a Backyard Office or Shed in Plumas County, California?
Rule: Permits required for sheds over 120 square feet.
Contact: Plumas County Building Department
Do I Need a Permit to Build a Backyard Office or Shed in Riverside County, California?
Rule: Backyard offices generally require permits.
Contact: Riverside County Building and Safety Department
Do I Need a Permit to Build a Backyard Office or Shed in Sacramento County, California?
Rule: Structures over 120 square feet or with utilities require permits.
Contact: Sacramento County Building Permits and Inspection Division
Do I Need a Permit to Build a Backyard Office or Shed in San Bernardino County, California?
Rule: Permits required for structures used as offices or living spaces.
Contact: San Bernardino County Land Use Services Department – Building and Safety
Do I Need a Permit to Build a Backyard Office or Shed in San Diego County, California?
Rule: Most backyard offices require permits.
Contact: San Diego County Planning & Development Services
Do I Need a Permit to Build a Backyard Office or Shed in San Francisco County, California?
Rule: Permits are required for most detached structures.
Contact: San Francisco Department of Building Inspection (DBI)
Do I Need a Permit to Build a Backyard Office or Shed in San Joaquin County, California?
Rule: Permits required for sheds over 120 square feet or utility-connected structures.
Contact: San Joaquin County Community Development Department
Do I Need a Permit to Build a Backyard Office or Shed in San Luis Obispo County, California?
Rule: Backyard offices generally require permits.
Contact: San Luis Obispo County Building and Planning Department
Do I Need a Permit to Build a Backyard Office or Shed in San Mateo County, California?
Rule: Most accessory structures require permits.
Contact: San Mateo County Planning and Building Department
Do I Need a Permit to Build a Backyard Office or Shed in Santa Barbara County, California?
Rule: Permits required for backyard offices.
Contact: Santa Barbara County Planning and Development Department
Do I Need a Permit to Build a Backyard Office or Shed in Santa Clara County, California?
Rule: Permits required for sheds over 120 square feet and all office uses.
Contact: Santa Clara County Planning Office and Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Santa Cruz County, California?
Rule: Permits required due to zoning and coastal rules.
Contact: Santa Cruz County Planning Department
Do I Need a Permit to Build a Backyard Office or Shed in Shasta County, California?
Rule: Permits required for accessory structures over 120 square feet.
Contact: Shasta County Development Services Department – Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Sierra County, California?
Rule: Permits required for larger structures.
Contact: Sierra County Planning Department
Do I Need a Permit to Build a Backyard Office or Shed in Siskiyou County, California?
Rule: Permits required for sheds over 120 square feet.
Contact: Siskiyou County Community Development Department
Do I Need a Permit to Build a Backyard Office or Shed in Solano County, California?
Rule: Permits required for backyard offices.
Contact: Solano County Resource Management Department
Do I Need a Permit to Build a Backyard Office or Shed in Sonoma County, California?
Rule: Backyard offices require permits due to zoning and fire regulations.
Contact: Sonoma County Permit and Resource Management Department
Do I Need a Permit to Build a Backyard Office or Shed in Stanislaus County, California?
Rule: Permits required for structures over 120 square feet.
Contact: Stanislaus County Department of Planning and Community Development
Do I Need a Permit to Build a Backyard Office or Shed in Sutter County, California?
Rule: Accessory structures exceeding 120 square feet require permits.
Contact: Sutter County Development Services Department
Do I Need a Permit to Build a Backyard Office or Shed in Tehama County, California?
Rule: Permits required for sheds and backyard offices over 120 square feet.
Contact: Tehama County Planning Department
Do I Need a Permit to Build a Backyard Office or Shed in Trinity County, California?
Rule: Permits required for larger accessory structures.
Contact: Trinity County Planning Division
Do I Need a Permit to Build a Backyard Office or Shed in Tulare County, California?
Rule: Permits required for sheds exceeding 120 square feet.
Contact: Tulare County Resource Management Agency – Building Services
Do I Need a Permit to Build a Backyard Office or Shed in Tuolumne County, California?
Rule: Most backyard offices require permits.
Contact: Tuolumne County Community Development Department
Do I Need a Permit to Build a Backyard Office or Shed in Ventura County, California?
Rule: Backyard offices typically require permits.
Contact: Ventura County Building and Safety Division
Do I Need a Permit to Build a Backyard Office or Shed in Yolo County, California?
Rule: Permits required for sheds over 120 square feet.
Contact: Yolo County Community Services – Building Division
Do I Need a Permit to Build a Backyard Office or Shed in Yuba County, California?
Rule: Permits required for larger sheds and backyard offices.
Contact: Yuba County Community Development and Services Agency
Key Takeaway
While 120 square feet is commonly the threshold for permit exemptions, most backyard offices in California require permits due to electrical, insulation, and intended use.
If you are unsure whether your project needs a permit, our team can help guide you before construction begins.
