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Contact

If you have questions about the ADU permitting process, please reach out to our ADU
Ally at the Permit Center:

ADU Ally
adu.ally@sanjoseca.gov
408-793-5302

Accessory Dwelling Units (ADUs)

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On ADU Tuesdays, we now offer express plan  review for ADU projects in our Permit Center!
Read our ADU Tuesdays flyer.


Accessory dwelling units — also called ADUs, secondary units, or granny flats — are small living units, including a kitchen and bathroom, on a property that has one single-family home.

There are many benefits to ADUs, including that they:

  • Create more affordable housing for our community, family members, or disabled persons;
  • Provide an income opportunity for homeowners;
  • Promote infill development; and
  • Encourage the use of public transportation.

Eligible Properties

  • Single-family lots that are 3,000 square feet or larger may qualify for an ADU.
  • Use the ADU Universal Checklist to learn about eligiblity, rules about location and size, and other development standards and requirements.

    Are you ready to proceed with an ADU project? See the Permit & Plan Review Process webpage.

Check out our "ADU Permit Video" on our YouTube channel. Our expert planners and inspectors provide tips on how to design a project that complies with the Zoning Code and how to avoid common mistakes in the inspection process.