5 county-level rules, plus city-specific rules for 4 cities in Dane County, Wisconsin.
Verified from official government sources
Dane County Chapter 14 and Madison General Ordinance Ch. 37 require stormwater control plans for new development with 4,000+ sq ft of disturbance. Post-construction practices must reduce TSS by 80% and meet Yahara TMDL phosphorus limits.
Dane County Ch. 14 and Madison MGO Ch. 37 require erosion control permits for land disturbance of 4,000 sq ft (Madison) or 1 acre (county). Implements WI NR 151. Silt fence, tracking pads, and weekly inspections mandatory.
Dane County Shoreland Zoning Ordinance Ch. 11 enforces WI NR 115 buffers: 75-foot setback from Yahara lakes (Mendota, Monona, Waubesa, Kegonsa) and navigable streams. Impervious surface capped at 15% within 300 feet of OHWM.
Dane County enforces floodplain zoning under Chapter 17 for unincorporated areas. Development in FEMA Zones A and AE requires a floodplain development permit. Dane County participates in NFIP.
Dane County and Madison require grading permits for earthwork exceeding 400 cubic yards or disturbance of 4,000+ sq ft. Fill cannot redirect surface water onto adjoining lots. Retaining walls over 4 feet need engineered plans per WI DSPS UDC.
4 cities in Dane County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
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Dane County Ordinance Hub →