ADU Regulations in Tehama County, California (2026)

Regulations at a glance

Local rules & notes

Pre-Designed ADU Plans: The County provides three specific pre-approved plans (Olive, Acorn, Fig) to streamline the review process and reduce design costs. Building Separation Requirement: Detached ADUs must maintain a minimum 10-foot separation from the primary dwelling. Mobile Home Prohibition: The county explicitly prohibits the use of mobile homes as accessory dwelling units.

For the official ordinance and latest updates, check your city or county planning department.

Frequently asked questions about ADU regulations in Tehama County

• What is the maximum ADU size in Tehama County, California?

  In Tehama County, the maximum ADU size is typically 1200 square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; Tehama County may follow state defaults or have local limits. Verify with Tehama County planning for your specific lot.

• What are the setback requirements for ADUs in Tehama County?

  In Tehama County, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Tehama County planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Tehama County?

  In Tehama County, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with Tehama County or county planning for your zone.

• Is ADU approval ministerial in Tehama County?

  In Tehama County, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; Tehama County planning can confirm the exact process.

• Are there parking requirements for ADUs in Tehama County?

  In Tehama County, parking for ADUs is generally false. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Tehama County planning for your address.