Santa Rosa ADU Permit Fees & Cost Calculator
Santa Rosa approves ADUs through the building permit process and follows California’s ADU fee limits: no impact fees for ADUs under 750 square feet, reduced fees for larger ADUs, and no separate utility connection fees for internal conversion ADUs under 750 square feet. The city’s official fee schedule also shows surcharge percentages applied to permit-related fees, but the exact ADU total depends on project type and must be verified with current permit staff or an itemized permit estimate.
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
Exact ADU totals vary by size, whether the unit is a conversion or new detached build, and whether utility or fire-related requirements apply.
Santa Rosa’s published pages confirm exemptions and surcharges, but not a single fixed fee for all ADUs.
Non-city utility, school, or special-district charges may still apply and should be verified separately if needed.
The property is within the City of Santa Rosa jurisdiction, not unincorporated Sonoma County.
The user wants permit and pre-development fee data, not construction cost estimates.
The official city pages retrieved do not provide a complete itemized ADU fee calculator, so unclear items are marked unknown or manual_note.
FAQs
Are Santa Rosa 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 Santa Rosa?
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.