BLOG POST

San Jose City ADU Guide

David Reyes
David Reyes

ADU Jurisdiction Guide: San Jose City
Fees and Regulations (May 2022)

ADU-allowed Zones

ADU Size Limitations

  • Floor Area: Maximum of 1,200 Square Feet for Lots greater than 9,000 Square Feet
  • Floor Area: Maximum of 1,000 Square Feet for Lots less than/equal to 9,000 Square Feet

ADU Building Height

Single Family ADUs

  • Attached ADU: Same height limitations as apply to the main dwelling unit.
  • Detached ADU: One story: 18 feet maximum. Two-story: 24 feet maximum

Duplex or Multifamily ADUs

  • Attached ADU: Limited to the conversion of existing non-livable space & must maintain existing height.
  • Detached ADU: 16 feet maximum per state law

Minimum Lot Size

None

Setbacks Requirements

Single Family Homes

  • Attached ADU: Same setback requirements as apply to the main dwelling unit
  • Detached ADU:
    • Must be set back 45 feet minimum from the front property line.
    • Rear/side setbacks less than 3 feet may be subject to fire mitigation measures
    • A second story OR new ADU with greater than 40% rear yard coverage must be set back 4 feet from both rear and side property lines.

Owner Occupancy Requirements

None

ADU Permit Process

General Process can be seen here.

Average Time for ADU Plan Sets Approval

Overall Process: 6-8 Weeks

ADU Permit Fees (under 750 square feet)

  • Permit Issuance Fee: $386
  • Plan Review Fee: $952
  • Inspection Fee: $1,534

Impact Fees

A permit cost estimate worksheet (attached below) can be submitted to find more accurate permitting fees. School fees and parkland impact fees do not apply to ADUs under 750 sqft.

Water/Sewer Line Connection Fee

If ADU is detached from the residence, it may require a fee to be estimated.

Estimated Mavericks Permit Fees

  • Maverick 392: $2,744
  • Maverick 504: $3,528
  • Maverick 748:  $5,236

Resources

Contact References

ADU Ally

  • Phone: 408-793-5302
  • Email: adu.ally@sanjoseca.gov

We hope this quick reference guide helps you out in your ADU project. Part of our service if you build with us is the full service of our in-house permit technician who handle the processing of your permit on your behalf with no mark-ups. 

If you’re interested in building with ADU.Works, please don’t hesitate to book a consultation with us or give us a quick call through our number +1 (650) 227 4810. We’ll gladly discuss the specifications of your permit processing and accommodate any questions you may have. Our team looks forward to hearing from you.

Join our weekly newsletter

HELPFUL READS

FOLLOW US ON FACEBOOK AND GET THE LATEST ADU UPDATES!

Contact us

GET STARTED WITH A FREE CONSULTATION

A modern dwelling right in your backyard. Boost your earnings, living space, and property value.

Take the first step with our ADU Specialist. Set a schedule with your information and we’ll call you to conduct a FREE assessment.

Can’t decide the date yet? Contact us here instead. Our friendly ADU experts will give you a call to answer your inquiries.

Join Our List

Subscribe now for ADU news updates!