Detroit ADU Permit Fees & Cost Calculator
Detroit’s official fee schedule shows a valuation-based residential building permit structure, plus separate flat fees for plan review and some pre-development services. For a typical ADU, the exact total depends on declared project valuation and the mix of residential building, trade, and any advisory or variance-related permits that apply; the official schedule should be verified for the current line items before budgeting.
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
Do not treat the listed flat residential permit amounts as a complete ADU total; Detroit permit costs can vary by valuation and permit type.
The official schedule excerpt shows some fees but not all possible ADU-related charges, so final budgeting should be confirmed directly with Detroit BSEED.
Avoid using non-official third-party estimates as exact fee figures.
The ADU will be processed through Detroit BSEED using the city’s standard residential permit and review framework.
The excerpted official fee schedule is sufficient to identify some relevant fees, but not enough to calculate a full all-in ADU permit total.
Any trade permits, inspection surcharges, or zoning relief fees that may apply to a specific ADU site are not included because the exact line items were not fully visible in the available official excerpt.
FAQs
Are Detroit 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 Detroit?
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 Michigan?
Yes. Permit, utility, school, inspection, and impact fees can vary by jurisdiction, parcel, project size, utility provider, and local interpretation.