What is a Junior ADU?

A junior ADU (JADU) is existing space within a primary dwelling which is converted into an efficiency studio.  To be considered a JADU, the following requirements must be met:

  • Unit may be no larger than 500 sf
  • Maintain an internal connection between the primary dwelling and the JADU
  • Provide a separate entrance
  • Provide an efficiency kitchen, which includes: 
    • A sink drain with a maximum waste diameter of 1.5 inches
    • Cooking facilities with appliances that do not require more than 120 volts, natural or propane gas
    • Food preparation counter and storage cabinets that are reasonable size in relation to the size of the JADU
  • Sanitation facilities may be private or shared with the existing structure
  • Either the primary dwelling or the JADU must be occupied by the property owner
  • May not be used for short-term rentals (less than 31 days)
  • Property owner must record a deed restriction to the property’s title prohibiting the sale of the JADU separate from the sale of the primary residence and restricting the size and attributes of the JADU


Show All Answers

1. What is an ADU?
2. Is an ADU allowed on my property?
3. What size of an ADU is allowed?
4. What is the difference between an attached ADU and a detached ADU?
5. What are the setbacks requirements for an ADU?
6. How many bedrooms are allowed in an ADU?
7. How is the floorspace of the ADU calculated?
8. What is the height limit of an ADU?
9. What are other factors when considering an ADU?
10. Can I rent the ADU or does it have to be occupied by family?
11. Can a manufactured home be used as an ADU?
12. Can a “Tiny Home” be used as an ADU?
13. Is additional parking required for an ADU?
14. Can an existing garage be converted into an ADU?
15. How many ADUs are allowed?
16. What is a Junior ADU?
17. Does an ADU require separate utilities?
18. Is solar energy required for ADUs?
19. Are fire sprinklers required in an ADU?
20. Do I need a permit to create the ADU?
21. How much is a building permit for an ADU?
22. Will my property taxes increase?