ADU Impact Fees: Greenfield vs Milwaukee
How do adu impact fees rules compare between Greenfield, WI and Milwaukee, WI?
Greenfield, WI
Milwaukee County
No data available yet for Greenfield.
Milwaukee, WI
Milwaukee County
Milwaukee does not charge development impact fees on residential ADUs. Wisconsin Statute 66.0617 authorizes impact fees broadly but requires demonstration of new capacity need. Milwaukee currently charges only standard permit fees through DNS. Milwaukee Water Works charges connection fees only when a new service is installed.
View full Milwaukee rules →Key Facts Comparison
| Fact | Greenfield | Milwaukee |
|---|---|---|
| Municipal Impact Fees | - | None on ADUs |
| State Authority | - | Wis. Stat. 66.0617 |
| Building Permit | - | ~1-1.5% of construction |
| Utility Connection | - | Only if new service |
Highlighted rows indicate differences between cities.
Greenfield FAQ
No FAQs available.
Milwaukee FAQ
Does Milwaukee charge impact fees for ADUs?
No. Milwaukee does not impose development impact fees on residential ADUs. Standard permit fees apply through DNS, plus trade permit fees and any utility connection fees from Milwaukee Water Works if new service is required.
How much does it cost to permit an ADU in Milwaukee?
Total municipal fees typically range from $1,200 to $3,500. Building permit fees scale to project value at roughly 1-1.5 percent. Trade permits add several hundred dollars. Utility connection fees only apply if a new water service or sewer connection is installed.
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