Stormwater Management

A Stormwater Management Permit is required for any of the following:

• Any development after August 22, 2001 that results in the cumulative addition of 20,000 square feet of impervious surface to the site
• Recording a subdivision plat
• Recording a certified survey map intended for commercial or industrial use
• Redeveloping more than 4,000 square feet of an existing commercial, industrial, institutional or multifamily-use site
• Other land development activities that the local approval authority determines may significantly increase runoff, flooding, soil erosion, water pollution or property damage, or significantly impact a lake, stream, or wetland area

View application materials below:

• Application Materials and submission instructions

Before you apply, you may wish to review / complete:

• Stormwater Manual for an overview of permit requirements and process
• Frequently Asked Questions
• Permit Fees
• Thermally Sensitive Areas & Thermal Model webpage which has information on how you can determine if your site it located within a thermally sensitive area.

Primary Tools

• Stormwater Manual - overview of permit requirements and process
• Soil Loss & Sediment Discharge Calculation Tool - Universal Soil Loss Equation (USLE) spreadsheet used to calculate soil loss and sediment discharge from construction sites
• Land & Water Viewer - online mapping application that can be used to create online and printable maps for permit applications
• Thermally Sensitive Areas & Thermal Model webpage which has information on how you can determine if your site it located within a thermally sensitive area.

Additional Tools

• Acceptable Native Species for the Shoreland Zone (PDF) - plant species that have been approved for use in establishing a native vegetated buffer to meet shoreland zoning requirements.
• Permit Info Fact Sheet (PDF)
• Permit Fees

Additional forms that may need to be submitted with your permit application(s):

• Stormwater Maintenance Agreement Affidavit (PDF)
• Release of Restriction Form (PDF)
• Applicant Authorization Form (PDF)
• Stormwater Management As-Built Certification
• Recommended construction practices for infiltration facilities (PDF)
• Memo to Chapter 14 Permit Applicants explaining Financial Security Instrument requirement (PDF)
• Example Format for Letter of Credit for Chapter 14 Permit Applicants (PDF)
• Example Format for Letter of Credit for Chapter 14 Permit Applicants (Word)
• Example Format for Notarized Statement Authorizing an Applicant (PDF)

Your project may also need a permit from another agency, common links are provided below. Please confirm permit requirements prior to beginning a project.

Department of Planning & Development

• Floodplain
• Shoreland Zoning
• Zoning

Wisconsin Department of Natural Resources

• Water Permits 
• Dredging