ADU rules in San Leandro, CA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
San Leandro Zoning Code §2.04.388 allows one detached ADU and one JADU per single-family lot through ministerial review, implementing California Government Code §§65852.1, 65852.2 and 65852.22.
Section 2.04.388 of the San Leandro Zoning Code authorizes accessory dwelling units (ADUs) and junior accessory dwelling units (JADUs) on lots with existing or proposed single-family or multifamily uses. The minimum unit size is 150 sq ft or an efficiency unit per Health & Safety Code §§17958.1 and 18007, whichever is greater. Detached ADUs may be up to 16 ft tall; attached ADUs up to 25 ft. Minimum 4-foot side and rear setbacks apply; detached ADUs must keep a 5-foot separation from other structures and may not occupy a required front yard. ADUs and JADUs do not count toward maximum density of the zoning district. ADUs over 800 sq ft must comply with the underlying district's lot coverage, FAR, and open space rules. No additional or replacement parking is required (consistent with Gov. Code §66323).
ADUs constructed without permits are subject to building code enforcement, stop-work orders, and abatement under San Leandro Municipal Code Title 7. Unpermitted structures may be ordered modified or removed; civil penalties accrue per Building Division enforcement and California Building Code §113.
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Side-by-side rule comparisons with other cities in Alameda County.
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