ADU Regulations in Corona, California (2026)

Regulations at a glance

Local rules & notes

Generous Height Limit: Riverside explicitly allows ADUs up to 35 feet and two stories in most areas, which is more permissive than the state minimum of 16-25 feet depending on location. JADU Owner Occupancy: While ADUs do not require owner occupancy, JADUs explicitly require a deed restriction for owner occupancy of one unit. Garage Conversion Parking Exemption: The city explicitly states no replacement parking is needed for the primary dwelling when a garage is converted, removing a common barrier to development.

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

Frequently asked questions about ADU regulations in Corona

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

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

• What are the setback requirements for ADUs in Corona?

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

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

  In Corona, the maximum height for an ADU is generally 35 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 Corona or county planning for your zone.

• Is ADU approval ministerial in Corona?

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

• Are there parking requirements for ADUs in Corona?

  In Corona, parking for ADUs is generally 0. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Corona planning for your address.