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Accessory Dwelling Units (ADUs)

An Accessory Dwelling Unit (ADU) is an attached or detached dwelling unit located on a lot which contains a single-family or multi-family dwelling.  It shall include provisions for living, eating, sleeping, cooking, and sanitation.  An ADU may include an efficiency unit or manufactured home, but is not considered an accessory building. 

A Junior ADU is no more than 500 sq. ft. in size and is contained entirely within an existing single-family structure.  A junior ADU may include separate sanitation facilities or may share sanitation facilities with the existing structure.


Pursuant to California Government Code Section 66310 - 66342, as amended and Zoning Ordinance section D4-39, The City of San Ramon allows ADUs and Junior ADUs subject to specific standards and review and approval by the City.  For information, and instructions for application and submission, please review the Accessory Dwelling Unit Informational Handout, and Acessory Dwelling Unit Permit Application Packet below:

*Please note the required Deed Restriction must be submitted prior to Building Permit Final Inspection*

Please contact the Planning Services Division at (925) 973-2560 or at [email protected] if you have any questions about the submittal requirements or the review process.