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Accessory and Junior Accessory Dwelling Units

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Building Life and Safety 
345 N. El Dorado Street, 
Stockton, CA 95202
(209) 937-8561

Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs) are an innovative and effective option for adding housing in Stockton.

ADUs have been known by many names: granny flats, in-law units, backyard cottages, secondary units and more. Learn more about the definition of these types of housing units, what is required to build them, and what resources are available.

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More Information about ADUs and JADUs
ADU Information

An Accessory Dwelling Unit (ADU) is an attached or detached residential dwelling unit on the same lot as an existing or proposed single-family dwelling that is zoned for single-family or multifamily use. ADUs provide independent living quarters for one household on the same lot as an existing or proposed single-family or multifamily dwelling, including areas for sleeping, eating, cooking, and sanitation. An ADU may be detached, attached or a converted structure located within the walls of the primary dwelling unit on the lot.

  • Detached: The ADU structure is detached from the primary dwelling unit.
  • Attached: The ADU structure is attached to the primary dwelling unit.
  • Converted: The ADU within the existing primary dwelling unit or the ADU was established through the conversion of an accessory structure, for example, a garage or pool house
  • Review Flyer for City of Stockton Pre-Approved ADU Plans
JADU Information

A Junior Accessory Dwelling Unit (JADU) is no more than 500 square feet in size and contained/constructed entirely within the walls of an existing single-family structure. The property owner is required to reside in either the main dwelling or the JADU. This may include the conversion of an attached garage but detached accessory structures cannot be converted to JADUs. 

  • Efficiency kitchen required: Includes plug-in-type cooking appliances, adequate food prep counter, and refrigerated storage.
  • Sanitation Facilities: May be included in the JADU or may share with the main dwelling. Interior access to the main dwelling is required if sharing bathroom facilities.
  • A JADU is not allowed to be constructed in a multi-family building.
  • The property owner is required to reside in the main dwelling or the JADU, this requirement is documented on a recorded deed restriction.
  • Review Flyer for City of Stockton Pre-Approved ADU Plans.
Benefits of an ADU and JADU
  • These type of units can provide a source of income for homeowners; 
  • Allows homeowners the flexibility to create a home to share with family members
    and others;
  • Offers an opportunity for multi-generational living, allowing seniors to age in place as they require more care;
  • May provide affordable and additional housing opportunities within existing neighborhoods; and
  • A cost-effective way to provide additional housing, by potentially eliminating the cost of purchasing land, installing or building major new infrastructure, or creating new structured parking.
Permitting Process for ADUs and JADUs

The following documents have been created to assist in the preparation of a Building Permit submittal for an ADU or JADU. For custom design ADU/JADU projects, please refer to the Plan Review Submittal Checklist for a list of items required. If you would like to take advantage of the City’s Pre-Approved ADU program, please refer to the Pre-Approved Accessory Dwelling Unit Checklist and Sample Site Plan for further guidance.

Pre-Approved Plans for ADUs:   Studio, 1 Bedroom, 2 Bedroom

Accessory Dwelling Unit (ADU) plans are available free of charge to community members looking to build an ADU within City limits. There are three different floor plans to choose from Studio, 1 Bedroom, and 2 Bedrooms - all with 1 Bath. All plans are pre-approved to meet the latest code requirements and utilize simple, cost-effective designs. To meet the latest energy code requirements, all plan options are electric power only (no gas service).

htpp://www.stocktonca.gov/files/ADU_Guide_.pdf Image of Studio Floor Plan Link Image of 1 Bedroom Floor Plan Without LinkImage of 2 Bedroom Floor Plan Without Link

Last Update : 12/06/2023, 2:36:47 PM