Dunn County, Wisconsin
Town of Hay River is a town in Dunn County, Wisconsin. Septic permits inside Town of Hay River come from Dunn County (Dunn County Planning & Land Use — Sanitation · 715-231-6520). 15 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Dunn County page.
Town of Hay River does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Land inside Hay River town for uses listed as permitted uses in a county zoning district
“zoning permits are required for uses that are listed as "permitted uses" within a zoning district.”
Zoning districts of Dunn County Chapter 13 that govern land inside Hay River town under county zoning
“sheridan wilson tiffany hay river otter creek grant sherman tainter colfax lucas menomonie red cedar weston dunn peru stanton”
Residential districts R1, R2, and R3 (and SR) inside Hay River town under county zoning
minimum lot area, not served by community sewer: >= 1 acre (excluding road right-of-way) · minimum lot area, served by community sewer: >= 10000 square feet
“lots served by community sewer shall be a minimum of 10,000 square feet and a minimum of 60 feet wide at the highway or building setback line. (01/18/2017) (2) lots not served by community sewer shall be a minimum of one acre excluding road right-of-way and a minimum of 85 feet wide at the highway or building setback line.”
“ential cluster shall be one acre in the ia and pa districts. the ga district shall have a minimum lot size of one acre, excluding road right-of-way.”
Residential districts R1, R2, and R3 inside Hay River town under county zoning (principal structures)
side yard, principal structure: 10 feet (corner lots 25 feet) · rear yard, principal structure: 25 feet · highway setback, class d town highway: 42 feet (from right-of-way line)
“the side yard setback on corner lots shall be 25 feet for all principal structures and 10 feet for all accessory structures. rear yard (1) the minimum rear yard setback shall be 25 feet for principal structures. (2) the minimum rear yard setback shall be 5 feet for accessory structures.”
“the minimum side yard setback shall be 10 feet for principal structures. (2) the minimum side yard setback shall be 5 feet for accessory structures. principal structure setbacks apply for accessory structures greater than 1000 square feet.”
Agriculture districts IA, PA, and GA inside Hay River town under county zoning (residential structures)
maximum height, residential structure: <= 35 feet (agricultural structures exempt with setback increase)
“height (1) the maximum height of a residential structure shall be 35 feet (2) agricultural structures such as barns, silos, tanks, and windmills are hereby exempt from the height regulation provided the front, side and rear yard setbacks are each increased at least one foot for each additional foot of height above 35 feet.”
Manufactured and mobile homes inside Hay River town under county zoning
“single/two-family dwelling, excluding mobile homes defined in 101.91(10) wis. stats.”
Accessory dwelling units on a lot inside Hay River town under county zoning
maximum ADU floor area: <= 1200 square feet
“in no case shall the adu be greater than twelve-hundred (1200) square feet.”
Private onsite wastewater systems for land inside Hay River town
“dunn county's shoreland, floodplain, land division, and sanitary ordinances apply to all towns in dunn county.”
Private onsite wastewater system permits for land inside Hay River town, issued under the county zoning ordinance
“issue zoning and sanitary permits and maintain records thereof;”
“no county, city, town or village may issue a building permit for construction of any structure requiring connection to a private on-site wastewater treatment system unless”
Existing private onsite systems that serve a structure requiring a connection, before a building permit issues
“an onsite inspection of an existing private sewage system must be made before a building permit may be issued for any type of construction requiring a connection to that system.”
Land division of parcels inside Hay River town
“dunn county's shoreland, floodplain, land division, and sanitary ordinances apply to all towns in dunn county.”
Driveways that connect to class b, c, or d highways (including town roads) inside Hay River town
“a permit shall be obtained from the jurisdiction having control over the highway prior to issuance of a zoning permit.”
We looked and could not find an official answer yet. Silence is not permission; ask Town of Hay River or Dunn County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Town of Hay River publishes no rule on the point, not that none exists. Dunn County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Town of Hay River means bringing your own water and power. The kit we’d start with:
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