Baton Rouge ADU Permit Fees & Cost Calculator
Baton Rouge does not appear to have a statewide ADU fee schedule; ADUs are handled through local residential permitting, and the official city fee page shows a residential new building permit fee of $0.80 per square foot with a $125 minimum, plus a $25 technology fee and other possible review/inspection charges. The city’s residential permit guidance also says accessory structures over 200 square feet require a permit, but the exact ADU-specific review path and any additional planning fees should be verified with the city/parish before filing.[3][7][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 official city fee page does not explicitly label an ADU-specific permit category, so the exact fee path must be confirmed with Baton Rouge permitting staff.
A detached ADU may require multiple permits or reviews, and total cost can differ materially from the base residential permit fee.
Do not assume the $0.80 per square foot rate is the full total; trade permits, inspections, and any required review fees may still apply.
The ADU is treated as a residential new building, remodel, or addition under Baton Rouge permit rules, depending on whether it is detached, attached, or an alteration to an existing structure.
No separate school fee, utility connection fee, or ADU-specific impact fee was confirmed from the provided official sources.
Any project-specific zoning, floodplain, or appeal-related costs are not included unless triggered by the parcel or application path.
FAQs
Are Baton Rouge 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 Baton Rouge?
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 Louisiana?
Yes. Permit, utility, school, inspection, and impact fees can vary by jurisdiction, parcel, project size, utility provider, and local interpretation.