San Francisco ADU Permit Fees & Cost Calculator
San Francisco allows ADUs, but the exact fee total depends on project valuation, scope, and whether the unit is under the California 750 sq ft impact-fee exemption. The city’s official fee schedule confirms valuation-based Department of Building Inspection fees, while California law sets the ADU impact-fee baseline for smaller units and school-fee rules remain district-dependent.[9]
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
No official San Francisco ADU fee schedule with exact dollar amounts was available in the search results, so numeric fee values are intentionally omitted.
School fees and utility connection charges were not confirmed from official district or utility sources in the provided results.
Secondary sources may reflect outdated or generalized fee ranges; verify all fees against current SF DBI, planning, school district, and utility schedules before using them for budgeting.
The project is a standard ADU in San Francisco and not a full new primary dwelling or unrelated alteration.
Permit fees are valuation-based and can vary substantially by project scope, which is why no exact dollar total is given.
California’s 750 sq ft ADU impact-fee exemption applies unless a local or project-specific rule changes the calculation.
FAQs
Are San Francisco 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 San Francisco?
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.