ADU Regulations in Santa Barbara, California (2026)

Regulations at a glance

Local rules & notes

Posted Sign Requirement: Property owners must install a public notice sign on the property within five calendar days of submitting an initial ADU permit application. High Fire Hazard Area Restrictions: Standard ADUs are prohibited in High Fire Hazard Areas (Extreme Foothill and Foothill), but 'Special ADUs' are permitted as an exception. Replacement Parking for Primary Unit: If an existing garage or carport is converted to an ADU, the required covered parking for the primary unit must be replaced on the same lot.

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

Frequently asked questions about ADU regulations in Santa Barbara

• What is the maximum ADU size in Santa Barbara, California?

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

• What are the setback requirements for ADUs in Santa Barbara?

  In Santa Barbara, 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 Santa Barbara planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Santa Barbara?

  In Santa Barbara, the maximum height for an ADU is generally 17 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 Santa Barbara or county planning for your zone.

• Is ADU approval ministerial in Santa Barbara?

  In Santa Barbara, 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; Santa Barbara planning can confirm the exact process.

• Are there parking requirements for ADUs in Santa Barbara?

  In Santa Barbara, 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 Santa Barbara planning for your address.