ADU Regulations in Benicia, California (2026)

Regulations at a glance

Local rules & notes

Stucco Finish Requirement Exception: Stucco with a sand finish of less than 20/20 is prohibited, but this provision does not apply to buildings situated more than 50 feet from the front property line (likely exempting rear ADUs). Canopy Tree Requirement: Single-Unit developments (including ADUs) must provide a minimum of one canopy tree per lot in the first four feet of the front yard setback area adjacent to the street. Frontage Orientation for Front ADUs: If an ADU is located between the primary dwelling and the front property line, the primary entrance must be oriented toward the street. Material Color Change Exemption: Single Unit, Primary Units, and ADU buildings are exempt from the requirement that paint color changes on continuous material may occur at any point along the façade.

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

Frequently asked questions about ADU regulations in Benicia

• What is the maximum ADU size in Benicia, California?

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

• What are the setback requirements for ADUs in Benicia?

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

• What is the maximum height for an ADU in Benicia?

  In Benicia, 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 Benicia or county planning for your zone.

• Is ADU approval ministerial in Benicia?

  In Benicia, 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; Benicia planning can confirm the exact process.

• Are there parking requirements for ADUs in Benicia?

  In Benicia, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Benicia planning for your address.