What is a Junior Accessory Dwelling Unit?

Updated: Sep 11, 2020


Another important piece of ADU legislation rules that changed effective beginning 2020. These provisions allow homeowners in California to construct both an Accessory Dwelling Unit (ADU) and a Junior Accessory Dwelling Unit (JADU) on the same lot within the existing single-family residence.

Let’s take a look at the Junior Accessory Dwelling Unit (JADU) rules from California State bills AB68 and AB 881:




Let’s take a look at the Junior Accessory Dwelling Unit rules from California State bills AB68 and AB 881:

  • Size – Junior ADU max of 500 sq. ft.

  • Location – Junior ADU must be within a proposed or existing single-family dwelling or Accessory Structure such as a garage, or bedroom etc.

  • Expansion – Junior ADU may include an expansion of up to 150 sq. ft. beyond the footprint of the existing dwelling, however this expansion is limited to accommodating ingress and egress such as hallways and entry way.

  • Separated Entry Way – Junior ADU exterior access, must have separate entrance for the Junior ADU, as well as an entry between Junior ADU and the existing single-family dwelling.

  • Parking – No parking required for a Junior ADU

  • Bathroom – Junior ADU may have a separate bathroom or shared with the single-family dwelling.

  • Kitchen – Junior ADU kitchen must meet “Efficiency Kitchen” requirements:

  • Cabinets and counter-tops in proportional size in relation to the Junior ADU size.

  • Kitchen sink (16”x16” max.) with a small drain line (1.5” diameter max.)

  • Appliances that require electrical service only, not greater than 120 volts.

  • A food preparation counter and storage cabinets should be at a reasonable size in relation to the size of the Junior ADU


Centrepoint's design build team can assist in planning your upcoming garage renovation ADU and JADU to utilize the most out of your space in a 3D design to add functionality and beauty. Call us to set up an appointment 1-323-536-3741

CentrePoint is a general contracting company serving the Southern California region with over 15 years of experience. Serving Beverly Hills, Brentwood, Burbank, Calabasas, Calabasas Hills, Chatsworth, Culver City, Encino, Glendale, Granada Hills, Hermosa Beach, Hidden Hills, Hollywood, Long Beach, LA, Los Angeles, WLA, West Los Angeles, Manhattan Beach, Marina Del Rey, North Hollywood, Northridge, Pacific Palisades, Palos Verdes Estates, Rancho Palos Verdes, Redondo Beach, Reseda, Rolling Hills, Rolling Hills Estates, San Fernando Valley, San Pedro, Santa Monica, Sherman Oaks, Pasadena, Studio City, Tarzana, Toluca Lake, Topanga, Universal City, Valencia, Van Nuys, Venice, West Hills, West Hollywood, West Los Angeles, Toluca Lake, Westlake Village, Westwood and Woodland Hills.

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