ADU Regulations in Sutter County, California (2026)

Regulations at a glance

Local rules & notes

Unpermitted Unit Amnesty: The city cannot deny a permit for an unpermitted ADU constructed before January 1, 2020, even if it violates certain building standards or local ordinances. Multifamily Detached Bonus: On lots with existing multifamily dwellings, up to eight detached ADUs may be allowed, provided the number does not exceed the number of existing units on the lot. Objective Standards Only: The city's requirement for ADUs to be 'substantially compatible' with the neighborhood is invalid; only objective, non-subjective standards may be applied.

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

Frequently asked questions about ADU regulations in Sutter County

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

  In Sutter County, the maximum ADU size is typically 800 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; Sutter County may follow state defaults or have local limits. Verify with Sutter County planning for your specific lot.

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

  In Sutter 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 Sutter County planning for overlay zones or design standards that could affect your site.

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

  In Sutter 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 Sutter County or county planning for your zone.

• Is ADU approval ministerial in Sutter County?

  In Sutter 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; Sutter County planning can confirm the exact process.

• Are there parking requirements for ADUs in Sutter County?

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