Bolthole Index

Dunn County, Wisconsin

Zoning, building permits and septic rules in Town of Hay River, 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.

Answers from the rulebook for Town of Hay River

Rules another office applies inside Town of Hay River

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.

  • Building permitRequired

    Land inside Hay River town for uses listed as permitted uses in a county zoning district

    • Construction may proceed after the zoning permit is issued.
    • The county page also directs owners to the town's UDC building inspector for additional permits.
    “zoning permits are required for uses that are listed as "permitted uses" within a zoning district.”
  • Zoning districtsPublished (with conditions)

    Zoning districts of Dunn County Chapter 13 that govern land inside Hay River town under county zoning

    • Applies inside Hay River town because the county zoning page lists the town as within county zoning and it is not one of the six excluded towns.
    • The town has not been shown to adopt its own district map.
    “sheridan wilson tiffany hay river otter creek grant sherman tainter colfax lucas menomonie red cedar weston dunn peru stanton”
  • Minimum lot sizeSpecified

    Residential districts R1, R2, and R3 (and SR) inside Hay River town under county zoning

    • Lots served by community sewer: 10,000 square feet minimum, 60 feet wide.
    • Lots not served by community sewer: one acre minimum excluding road right-of-way, 85 feet wide.

    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.”
    One more reviewed finding on this topic
    • Specified — Agriculture districts IA and PA (non-farm single or two-family residence) inside Hay River town under county zoning
      “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.”
  • SetbacksSpecified

    Residential districts R1, R2, and R3 inside Hay River town under county zoning (principal structures)

    • Corner lots: 25 feet side yard for principal structures.
    • Accessory structures: 5 feet side and 5 feet rear; principal setbacks apply to accessory structures over 1,000 square feet.
    • Highway/front setback follows Chapter 13 Sec. 13.3.2; town highways (class d) require 42 feet from the right-of-way line.

    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.”
    One more reviewed finding on this topic
    • Specified — Agriculture districts IA, PA, and GA inside Hay River town under county zoning (principal 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.”
  • Building heightSpecified

    Agriculture districts IA, PA, and GA inside Hay River town under county zoning (residential structures)

    • Barns, silos, tanks, and windmills are exempt from the height limit if front, side, and rear setbacks increase one foot per additional foot above 35 feet.

    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 homesLimited

    Manufactured and mobile homes inside Hay River town under county zoning

    • Single- and two-family dwellings in R2 exclude mobile homes defined in Wis. Stat. 101.91(10).
    • Mobile and manufactured home communities are allowed only as a listed use subject to section 13.3.6 and Wis. Stat. 66.0435.
    “single/two-family dwelling, excluding mobile homes defined in 101.91(10) wis. stats.”
  • Accessory dwellingsLimited

    Accessory dwelling units on a lot inside Hay River town under county zoning

    • No more than one ADU per lot or parcel.
    • The ADU must be subordinate in size to the primary single-family dwelling and may not exceed 1,200 square feet.
    • A zoning permit is required, and a deed restriction must be recorded before permit issuance.
    • An ADU may not be built on a lot with a two-family or multi-family dwelling.
    • Detached ADU is a listed accessory use in R2 and the agriculture districts under section 13.3.17.

    maximum ADU floor area: <= 1200 square feet

    “in no case shall the adu be greater than twelve-hundred (1200) square feet.”
  • Who permits septicCounty (with conditions)

    Private onsite wastewater systems for land inside Hay River town

    • State law (Wis. Stat. 145.195 and 145.20) sets the framework; the county sanitary ordinance administers the local program.
    • The county sanitary ordinance text was not located; authority is taken from the county page statement that the sanitary ordinances apply to all towns.
    “dunn county's shoreland, floodplain, land division, and sanitary ordinances apply to all towns in dunn county.”
  • Septic permitRequired

    Private onsite wastewater system permits for land inside Hay River town, issued under the county zoning ordinance

    • Sanitary permit fee and application details were not located.
    “issue zoning and sanitary permits and maintain records thereof;”
    One more reviewed finding on this topic
    • Required — Construction in Hay River town of any structure requiring connection to a private onsite wastewater treatment system
      “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”
  • Septic inspectionLimited

    Existing private onsite systems that serve a structure requiring a connection, before a building permit issues

    • Statute annotation only; it addresses existing systems, not a new system to be installed.
    • Inspection requirements for new systems were not located in the county text reviewed.
    “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.”
  • Subdividing landRegulated (with conditions)

    Land division of parcels inside Hay River town

    • Dunn County's land division ordinance (Chapter 16) applies to all towns; its text was not opened.
    “dunn county's shoreland, floodplain, land division, and sanitary ordinances apply to all towns in dunn county.”
  • Driveway accessRequired

    Driveways that connect to class b, c, or d highways (including town roads) inside Hay River town

    • A permit from the jurisdiction controlling the highway is required before a zoning permit issues.
    • Applies to portions of driveways within the right-of-way of class b, c, and d highways.
    “a permit shall be obtained from the jurisdiction having control over the highway prior to issuance of a zoning permit.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Hay River or Dunn County directly.

  • Owner-builder exemption — Owner-builder exemption for a dwelling inside Hay River town
  • Inspections — Building inspection for construction inside Hay River town
  • Certificate of occupancy — Occupancy approval for new construction inside Hay River town
  • Local zoning — Land inside Hay River town: whether the town itself adopts and administers a zoning ordinance
  • Minimum dwelling size — Minimum dwelling floor area inside Hay River town
9 more unanswered
  • Lot coverage
  • Tiny homes
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Building in a floodplain
  • Short-term rentals
  • Permit fees

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.

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