Key Standards for all ADUs*

*Refer to BCC 11.340.40 for all standards. 

  • Size: ADU cannot exceed 50% of gross sq. ft. of main dwelling 
  • Only one ADU allowed per property
  • Separate utility meters may not be installed for any I-ADU or D-ADU.
  • No separate addressing
  • Total residents in an ADU cannot exceed that number allowed for a “family” (refer to BCC 11.20)  
    • Family 
      • One person living alone;
      • Two (2) or more persons related by blood, marriage, adoption, or factual and functional equivalent living together in a single dwelling unit and maintaining a common household; or
      • Not more than four (4) unrelated persons residing together as a single, nonprofit housekeeping unit.

Show All Answers

1. What is an Accessory Dwelling Unit (ADU)?
2. Where are ADUs allowed?
3. How many ADUs are allowed on a property?
4. What are the benefits of getting an ADU permit?
5. Where can I find an ADU application?
6. How to apply for an ADU?
7. What are the code requirements for having an ADU?
8. Does having an ADU mean I can have a short-term rental or AirBnb?
9. Types of ADUs
10. Key Standards for all ADUs*
11. Key Standards for D-ADUs*
12. Standards for I-ADUs*