California ADU planning tool
Estimate ADU Permit Fees Before You Build.
Compare city-specific permit, plan check, impact, school, utility, and inspection fee estimates before committing to an ADU design.
Informational estimate, not official city advice. Every result shows confidence and review date.
Free ADU fee calculator
Estimate local ADU fees
Step 1 of 5: Location
The MVP covers California cities with visible confidence levels and dated source tracking.
Permit
Building permit and valuation-based city charges.
Plan check
Review fees for building, fire, planning, and resubmittals.
Impact
State and local development impact fee treatment.
School
District fees that may apply above size thresholds.
Utility
Water, sewer, electric, meter, and connection uncertainty.
Popular California cities
City-specific ADU fee calculators
Los Angeles
Los Angeles County
San Diego
San Diego County
San Jose
Santa Clara County
San Francisco
San Francisco County
Palo Alto
Santa Clara County
Oakland
Alameda County
Sacramento
Sacramento County
Long Beach
Los Angeles County
Irvine
Orange County
Mountain View
Santa Clara County
Sunnyvale
Santa Clara County
Santa Clara
Santa Clara County
Fremont
Alameda County
San Mateo
San Mateo County
Redwood City
San Mateo County
Paid report
A planning memo homeowners can share
The $29 Basic ADU Fee Report is designed to package the estimate, assumptions, source notes, and verification checklist into a polished PDF.
ADU Fee Estimate Report
Project summary and fee range
Detailed fee category table
Assumptions, source notes, and confidence labels
City verification checklist