Bolthole Index

Trempealeau County, Wisconsin

Zoning, building permits and septic rules in Town of Sumner, Wisconsin

Town of Sumner is a town in Trempealeau County, Wisconsin. 6 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Trempealeau County page.

Answers from the rulebook for Town of Sumner

Rules another office applies inside Town of Sumner

Town of Sumner does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Owner-builder exemptionAvailable (with conditions)

    An owner-occupant applying for an erosion-control or construction permit for a dwelling inside the Town of Sumner.

    • Available only when the applicant is or will be an owner-occupant.
    • The applicant must read the contractor-responsibility cautionary statement.
    “i vouch that i am or will be an owner-occupant of this dwelling for which i am applying for an erosion control or construction permit without a dwelling contractor certification and have read the cautionary statement regarding contractor responsibility on page 2 of this application.”
  • Building code adoptedPartial

    Residential construction inside the Town of Sumner administered through Trempealeau County Land Management.

    • The cited requirement expressly concerns residences and the One and Two Family Dwelling Code.
    “all residences shall obtain a building permit prior to construction and comply with the provisions of the one and two family dwelling code.”
  • InspectionsRequired

    Work under a Trempealeau County building permit inside the Town of Sumner.

    • Inspection access is granted at reasonable hours for a proper purpose.
    • Some installations have an explicit inspection requirement.
    “i expressly grant the building inspector, or the building inspector’s authorized agent, permission to enter the premises for which this permit is sought at all reasonable hours and for any proper purpose to inspect the work which is being done.”
  • Certificate of occupancyRequired

    New one- and two-family dwelling construction inside the Town of Sumner.

    • The construction-permit fee includes a final occupancy permit but does not include the land-use/zoning permit.
    “includes all required building, hvac, electric & plumbing permits, and final occupancy permit, does not include land use / zoning permit.”
  • Septic permitRequired

    Sanitary systems for development inside the Town of Sumner.

    • Application must be completed and signed by a Wisconsin licensed plumber.
    • A recorded deed copy must be filed before issuance.
    • Sanitary permit must issue before building/zoning permit.
    “permit application for a sanitary system (sbd-6398) shall be filled out and signed by a wisconsin licensed plumber. note: permits are issued in the name of the owner of the property. a copy of the recorded deed must be filed with this department prior to issuance of the sanitary permit.”
  • Subdividing landRegulated (with conditions)

    Land divisions inside the Town of Sumner, an unincorporated town of Trempealeau County.

    • A certified survey map is required for land divisions of less than 20 acres.
    • Map must be reviewed and approved by County Land Management before recording.

    CSM threshold: < 20 acres (land divisions)

    “the trempealeau county subdivision ordinance is in effect for all of the unincorporated areas of trempealeau county. a certified survey map (csm) is required for land divisions of less than 20 acres. the certified survey maps must be reviewed and approved by the trempealeau county department of land management prior to being recorded at the register of deeds office.”

Still unanswered

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

  • Zoning districts — Zoning districts governing land inside the Town of Sumner.
  • Minimum dwelling size — Single-family dwellings inside the Town of Sumner.
  • Lot coverage — Lots inside the Town of Sumner.
  • Building height — Buildings inside the Town of Sumner.
  • Living in an RV — Long-term RV occupancy on private land inside the Town of Sumner.
7 more unanswered
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Septic inspection
  • Mandatory utility hookup
  • Agricultural exemption
  • Short-term rentals

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 Sumner publishes no rule on the point, not that none exists. Trempealeau County’s page lists the county offices to call.

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