GetYourPermit

ADU permit process in Campbell, California

Last verified August 29, 2026

Prepared by GetYourPermit editorial teamReport an error

This guide includes the portions of the City permit process that passed our evidence review. Confirm project-specific requirements with the City before submitting.

Where to apply

Department
Building Inspection Division
Permit portal
City Online Portal System
Contact
408-866-2130building@campbellca.gov

Step by step

  1. 1

    Select ADU route and confirm conditional Planning requirements

    Review City Bulletin and correct application guide For new detached/attached ADU use City new-residential guide; confirm conversion planning condition Applicable City permit package

  2. 2

    Submit complete electronic Building Permit application

    Create MGO account Upload complete electronic package MGO Building Permit submission

  3. 3

    City checks upload adequacy

    Correct missing, inadequate, mislabeled or improperly formatted material if rejected Accepted application or MGO rejection notice

  4. 4

    City plan review

    Respond to City plan-check comments Plan-check comments or approval-ready package

  5. 5

    Submit response letter and corrections

    Prepare itemized response to each City plan-check comment Upload subsequent submittal Corrected resubmittal

  6. 6

    Satisfy known JADU issuance condition

    For JADU, record deed restriction before Building Permit issuance Building Permit issuance stage

  7. 7

    Schedule construction inspections

    Request inspection through MGO or phone Provide AM/PM preference if desired Field combination inspection

What you need to submit

  • Electronic ADU/JADU application materials and construction plans
  • Applicant response letter to plan-check comments
  • Recorded JADU deed restriction

Project-specific next step

Build your Campbell permit report

Choose your ADU type and size to bring the City process, researched permit fees, and early construction budget into one planning report.

Start my permit report

Sources for this guide

Additional city reference pages

  • CityFY 2027 Master Fee Schedule — Effective July 1, 2026

    The City current FY 2026-27 master schedule lists building-valuation formulas, plan check, ADU post-entitlement planning fees, and the ADU park in-lieu rule.

    Accessed August 28, 2026

  • CityFees

    The City live Fees page identifies FY 2026-27 and links directly to the current FY 2027 Master Fee Schedule.

    Accessed August 28, 2026

  • CityAccessory Dwelling Unit Bulletin

    The City bulletin states an ADU/JADU needs a complete Building Division permit application and does not require a land-use entitlement.

    Accessed August 28, 2026