Antioch ADU Permit Fees & Cost Calculator
Antioch’s official ADU FAQ says ADUs under 750 square feet are exempt from city development impact fees except school district fees, while larger ADUs pay proportional impact fees tied to the primary dwelling size. City department fees are based on project valuation, and Antioch gives an example of about $4,050 in department fees for a 515-square-foot ADU valued at $200,000; exact current fee tables should still be verified with the city and school district.[2][10]
Free ADU fee calculator
Estimate local ADU fees
Step 1 of 5: Location
The calculator uses staged city data from the ADUFee database with visible confidence levels and dated source tracking.
Fee overview
The Antioch FAQ does not provide a current numeric city fee schedule, only formulas and an example; exact fees must be verified with the city’s adopted fee resolution and permit counter.
School district fees are controlled by Antioch Unified School District, not the City of Antioch, and may change independently.
Do not treat third-party cost estimates as official fee data.
The user needs ADU permit and pre-development fee data focused on official fee treatment rather than construction cost estimates.
Current exact fee schedules were not available in the provided official sources, so amounts are left null unless explicitly supported.
Antioch fee estimates should be verified against the current city, utility, and school district fee schedules before filing.
FAQs
Are Antioch ADU fee estimates official?
No. ADUFee.com provides planning estimates only. Final fees are set by the city, utility providers, school district, and other agencies.
What sources are used for Antioch?
The database stores city, state, utility, school, county, and other source links where available. Each estimate should still be verified locally.
Can ADU fees vary within California?
Yes. Permit, utility, school, inspection, and impact fees can vary by jurisdiction, parcel, project size, utility provider, and local interpretation.