ADU Regulations in Arroyo Grande, California (2026)

Regulations at a glance

Local rules & notes

Historical Visibility Ban: The City prohibits ADUs within 500 feet of historic property from being visible from the public right-of-way. HCD deems this subjective and invalid. Illegal Deed Restriction: The City ordinance requires a deed restriction for ADUs, which HCD explicitly states is prohibited under State Law (only allowed for JADUs). Subjective Design Standards: The City includes subjective bans on specific colors and materials, which violates the requirement for objective standards. Front Setback Restriction: The City imposes a 20-foot front setback on ADUs, which HCD states cannot preclude the construction of an 800 sq ft unit.

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

Frequently asked questions about ADU regulations in Arroyo Grande

• What is the maximum ADU size in Arroyo Grande, California?

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

• What are the setback requirements for ADUs in Arroyo Grande?

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

• What is the maximum height for an ADU in Arroyo Grande?

  In Arroyo Grande, 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 Arroyo Grande or county planning for your zone.

• Is ADU approval ministerial in Arroyo Grande?

  In Arroyo Grande, 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; Arroyo Grande planning can confirm the exact process.

• Are there parking requirements for ADUs in Arroyo Grande?

  In Arroyo Grande, 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 Arroyo Grande planning for your address.