Ann Arbor ADU Permit Fees & Cost Calculator
Ann Arbor allows ADUs by zoning policy, but the city’s published fee page only clearly confirms inspection charges and does not provide a complete ADU-specific permit fee schedule in the retrieved sources. The most reliable city source indicates inspections are billed after completion, at $35 per inspection for inspections added to an open permit, while exact building, plan review, and utility connection fees still need verification from the city’s current fee tables or direct staff confirmation.
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 retrieved sources do not provide a complete current ADU fee schedule for Ann Arbor, so exact permit and plan review costs should be verified directly with the city.
The $35 inspection fee is not explicitly labeled as an ADU fee; it is a general city inspection charge that may apply to ADU permits.
No school impact fee, utility connection fee, or other dedicated ADU impact fee was confirmed in the retrieved official sources.
ADU projects in Ann Arbor typically require a building permit and may also require separate trade permits depending on scope.
Inspection charges apply only when inspections are performed on an open permit and are not prepaid.
Any historic-district review fee, if applicable, must be verified separately because the retrieved city source did not include the amount.
FAQs
Are Ann Arbor 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 Ann Arbor?
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.