FEMA flood zone rules in Middleton, WI — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
The City of Middleton regulates floodplain development through Chapter 24 (Floodplain Zoning) of the Middleton Municipal Code, in conformance with Wis. Stat. Sec. 87.30 and Wisconsin Administrative Code Chapter NR 116, plus 44 CFR Parts 59-72. The Yahara River and Pheasant Branch Creek are the primary regulated waterways. Middleton's floodplain ordinance was recodified with assistance from the Wisconsin DNR following FEMA's Dane County Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) updates. The ordinance establishes Floodway, Floodfringe, and Flood Storage Districts, and requires the lowest floor of habitable structures in the floodfringe to be elevated to the flood protection elevation - regional flood elevation plus 2 feet of freeboard.
Wisconsin requires every municipality with mapped floodplain to adopt a floodplain zoning ordinance meeting the minimum standards of Chapter NR 116 (Wis. Admin. Code) and 44 CFR Parts 59-72, under the authority of Wis. Stat. Sec. 87.30. The City of Middleton, located in Dane County, administers Chapter 24 (Floodplain Zoning) of its Municipal Code. The ordinance was recodified in 2025 with Wisconsin DNR assistance, primarily to incorporate FEMA's updated Flood Insurance Rate Maps (FIRMs) for Dane County and the countywide Flood Insurance Study (FIS). The principal regulated waterways through Middleton are the Yahara River system (including Lake Mendota tributaries) and Pheasant Branch Creek. Chapter 24 establishes three floodplain districts: the Floodway District (high-velocity channel where new structures and most fill are prohibited); the Floodfringe District (areas outside the floodway within the 1% annual chance floodplain, where development is allowed if elevated and protected); and a Flood Storage District that protects mapped floodwater storage areas so development cannot reduce effective storage and increase regional flood discharge. Under NR 116 and Wis. Stat. Sec. 87.30, the lowest floor of any habitable structure in the floodfringe must be at or above the flood protection elevation, defined in NR 116.03 as 2 feet above the regional (1% annual chance) flood elevation. Fill in the floodplain must extend at least 2 feet above the regional flood elevation. A floodplain permit issued by the city zoning administrator is required before any building permit may be issued for work in mapped floodplain. FEMA Flood Map Service Center (msc.fema.gov) and the Wisconsin DNR Floodplain Mapping Program provide the authoritative maps.
Wis. Stat. Sec. 87.30(2) and NR 116.21 require local enforcement of floodplain zoning. Violations of Chapter 24 - including new structures or fill in the floodway, building below the flood protection elevation in the floodfringe, or development that reduces flood storage capacity in the Flood Storage District - can result in citations, daily forfeitures under the city's general penalty provisions, restoration or removal orders, and loss of NFIP flood insurance eligibility for the property. Misrepresenting elevation data on a permit application is independently actionable. A community that fails to enforce its ordinance can be suspended from the National Flood Insurance Program under 44 CFR Part 59.
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