ADU Regulations in Santa Barbara County, California (2026)

Regulations at a glance

Local rules & notes

Privacy Standards for Two-Story Units: Upper story unenclosed landings or decks > 20 sqft facing adjoining property must be set back 15 feet from interior lot lines. High Fire Hazard Area Restrictions: ADUs are generally prohibited in High Fire Hazard Areas unless they meet the 'Special ADU' criteria. Special ADU Multi-Unit Allowance: The 'Special ADU' category allows for more than one ADU on a single lot, which is more permissive than standard state requirements for single-family lots.

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

Frequently asked questions about ADU regulations in Santa Barbara County

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

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

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

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

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

  In Santa Barbara County, 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 County or county planning for your zone.

• Is ADU approval ministerial in Santa Barbara County?

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

• Are there parking requirements for ADUs in Santa Barbara County?

  In Santa Barbara 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 Santa Barbara County planning for your address.