ADU Regulations in San Leandro, California (2026)

Regulations at a glance

Local rules & notes

Deemed Approved Status: If the local agency fails to approve or deny a completed application within 60 days, it is automatically deemed approved. Unpermitted Unit Amnesty: Local agencies must delay enforcement against substandard ADUs for five years if the violation is not a health/safety issue, provided the unit was built before 2020. HOA Interference Prohibition: Homeowners associations are strictly prohibited from influencing or reviewing ADU applications.

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

Frequently asked questions about ADU regulations in San Leandro

• What is the maximum ADU size in San Leandro, California?

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

• What are the setback requirements for ADUs in San Leandro?

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

• What is the maximum height for an ADU in San Leandro?

  In San Leandro, 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 San Leandro or county planning for your zone.

• Is ADU approval ministerial in San Leandro?

  In San Leandro, 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; San Leandro planning can confirm the exact process.

• Are there parking requirements for ADUs in San Leandro?

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