ADU Regulations in Anaheim, California (2026)

Regulations at a glance

Local rules & notes

Pre-Approved ADU Plans (AB 1332): Requires local agencies to develop a program for pre-approval of ADU plans by January 1, 2025, and to post contact info for applicants with pre-approved plans. Amnesty for Unpermitted ADUs (AB 2533): Prohibits local agencies from denying permits for unpermitted ADUs built before Jan 1, 2020, unless there is a health/safety violation. Also limits fees for these units. No Replacement Parking (SB 1211): Clarifies that uncovered off-street parking spaces demolished to build an ADU do not need to be replaced.

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

Frequently asked questions about ADU regulations in Anaheim

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

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

• What are the setback requirements for ADUs in Anaheim?

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

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

  In Anaheim, 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 Anaheim or county planning for your zone.

• Is ADU approval ministerial in Anaheim?

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

• Are there parking requirements for ADUs in Anaheim?

  In Anaheim, parking for ADUs is generally 1. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Anaheim planning for your address.