ADU Regulations in Yuba City, California (2026)

Regulations at a glance

Local rules & notes

Unlawful Setback Permit History Requirement: The city incorrectly required that an existing structure must have been built prior to 1990 to be exempt from setback requirements when converted to an ADU. Attached ADU Size Ratio Violation: The city's 50% size limit for attached ADUs failed to include the state-mandated '800 square foot' floor area ratio waiver. JADU Garage Conversion Silence: The ordinance was silent on whether attached garages could be converted to JADUs, which is explicitly allowed under state law.

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

Frequently asked questions about ADU regulations in Yuba City

• What is the maximum ADU size in Yuba City, California?

  In Yuba City, 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; Yuba City may follow state defaults or have local limits. Verify with Yuba City planning for your specific lot.

• What are the setback requirements for ADUs in Yuba City?

  In Yuba City, 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 Yuba City planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Yuba City?

  In Yuba City, 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 Yuba City or county planning for your zone.

• Is ADU approval ministerial in Yuba City?

  In Yuba City, 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; Yuba City planning can confirm the exact process.

• Are there parking requirements for ADUs in Yuba City?

  In Yuba City, 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 Yuba City planning for your address.