ADU Regulations in Maricopa, California (2026)

Regulations at a glance

Local rules & notes

Triple ADU Allowance: A third ADU is permitted on lots of at least one acre if one unit is designated as Affordable Housing. Massive ADU Size Limit: For lots exceeding 10,000 square feet, ADUs can be as large as 3,000 square feet, which is nearly triple the standard California limit. Zero Alley Setback: Detached ADUs can be built directly on the property line if it abuts a fully dedicated alley.

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

Frequently asked questions about ADU regulations in Maricopa

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

  In Maricopa, the maximum ADU size is typically 1000 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; Maricopa may follow state defaults or have local limits. Verify with Maricopa planning for your specific lot.

• What are the setback requirements for ADUs in Maricopa?

  In Maricopa, typical setback requirements are 3 feet from the side property line and 3 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Maricopa planning for overlay zones or design standards that could affect your site.

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

  In Maricopa, the maximum height for an ADU is generally 15 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 Maricopa or county planning for your zone.

• Is ADU approval ministerial in Maricopa?

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

• Are there parking requirements for ADUs in Maricopa?

  In Maricopa, 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 Maricopa planning for your address.