Environmental Rules in New Berlin, WI (2026)

Flood Zones

New Berlin regulates floodplain development through Article IXA (Floodplain Zoning) of Chapter 275, in conformance with Wis. Stat. Sec. 87.30 and Wis. Admin. Code Chapter NR 116, plus 44 CFR Parts 59-72 of the National Flood Insurance Program. The city has mapped 100-year floodplain along Poplar Creek, Deer Creek, Root River, Calhoun Creek, Tess Corners Creek, Underwood Creek, the Fox River drainage, and the Upper Kelly Lake Tributary. All development in the 100-year floodplain - including buildings, filling, excavation, and fences - requires a zoning permit from the Department of Community Development. The 50% substantial-improvement rule applies to any repair or improvement to existing structures.