Winnebago County, WI Environmental Rules: Erosion Control (2026)

A permit shall be required for all construction sites with one acre or more of land disturbance, and to

sites of less than one acre if they are a part of a larger common plan of development or sale. A permit shall be required

for land development or redevelopment which increases impervious surfaces greater than 15,000 square feet. The total

area of imperious surfaces shall be considered within the area of the parcel(s). Land development activities generally fall

into the following categories: commercial, industrial, platted subdivisions, or single lot activities. Stormwater plans for

commercial, industrial, subdivisions, will require more detailed information generally provided by an engineer whereas,

single lot activities normally will require non-engineered plans. Minor land development activities such as the

construction of a fence, minor landscaping, or construction of minor structures (10 x 10 or smaller) may be considered

exempt from permit requirements if the administering authority determines that no, or very minimal, adverse impacts

will result. The determination of impact shall be based, without limitation, upon criteria such as ponding of water,

backing up of water, or a threat to neighboring properties.

(2) PERMIT APPLICATION AND FEE. Unless specifically excluded by this ordinance, any land owner or operator

desiring a permit shall submit to the administering authority a permit application made on a form provided by the