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Junior Accessory Dwelling Units (JADUS)

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A Junior ADU (or JADU) is a new category of dwelling units created by the State of California. There are several distinctions between a standard ADU and a JADU detailed in the table below. The main difference is that a JADU is not required to have a dedicated bathroom.

A Junior ADU (or JADU) is a new category of dwelling units created by the State of California. There are several distinctions between a standard ADU and a JADU detailed in the table below. The main difference is that a JADU is not required to have a dedicated bathroom.

Architectural Plans for JADUs

The first step of JADU is to have an architectural plan if you don’t possess one we can help you connect with one of our trusted Architect partners in your area to get the Architectural Permit set prepared.

Engineering Services for JADUs

We have you covered completely with the engineering required for the JADU. You’re planning to make an investment by increasing your property value. Whatever your needs, our engineers are ready to work with you to understand your vision.

Junior Accessory Dwelling Units Law In California

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The State of California recently adopted legislation (SB 13, AB 68 and AB 881) that defines the standards local jurisdictions can apply to Accessory Dwelling Units (ADU) and Junior Accessory Dwelling Unit (JADU). This legislation is contained in the California State Government Code Section 65852.2. Read more

Junior Accessory Dwelling Unit (JADU) General Provisions

A. There is a limit of one JADU per lot zoned for single-family residences. The JADU shall be constructed within walls of a proposed or existing single-family residence.

B. Maximum size is 500 square feet, however, an additional 150 square foot expansion beyond the physical dimensions of the existing structure is permitted strictly to accommodate ingress and egress to JADU.

C. The JADU shall include a separate entrance from the main entrance to the proposed or existing single-family residence.

D. The JADU shall include an efficiency kitchen, which includes:

  • Cooking facility with appliances (240-volt service outlets now permitted).
  • Food preparation counter and storage cabinets that are of reasonable size in relation to the size of the JADU.
  • No restriction on maximum waste line diameter.

E. A deed restriction is required and must include the following stipulations:

  • Prohibition on the sale of the JADU separate from the sale of the single-family residence.
  • Restriction on the size and attributes of the JADU.
  • If a JADU is rented, the unit shall not be rented for a period of less than 30 consecutive calendar days.
  • Owner occupancy of one of the units on-site is required* *Owner-occupancy is not required if the owner is another governmental agency, land trust, or housing organization.

f. The JADU may share sanitation facilities (i.e. bathroom/shower) with a primary residence.

Additional Sources

  • https://www.hcd.ca.gov/policy-research/docs/FAQsADUJr.pdf
  • https://lf.downeyca.org/WebLink/DocView.aspx?id=416115&dbid=0&repo=Downey&cr=1
  • https://www.jdsupra.com/legalnews/new-california-housing-laws-ab-68-35837/