Zoning, building permits and septic rules in Town of La Grange, Wisconsin

Town of La Grange’s own rules

• Local zoningAbsent (with conditions)

  Land inside La Grange town (Monroe County, WI): the town does not administer its own zoning ordinance

  • Per the town's own statement, the town falls under Monroe County zoning; the county Zoning Department (Chapter 47) is the zoning contact for the town.
  • County zoning permit applications apply only to unincorporated areas, which includes La Grange town; cities and villages handle their own permits.
  • Zoning-only topics below are answered from county rules where the county page was opened; otherwise they are unknown.

  “the town of lagrange falls under monroe county zoning.”

Rules another office applies inside Town of La Grange

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

• Who permits septicCounty (with conditions)

  Private sewage systems for dwellings in La Grange town (unincorporated Monroe County), administered by the Monroe County Sanitation Department

  • Applies where the property is not served by a public sewage disposal plant.

  “if you live in an area of monroe county that is not served by a public sewage disposal plant you need a private sewage disposal system to service a dwelling, business, etc. which has running water.”

• Septic permitRequired

  Installing, repairing, replacing, or reconnecting a private sewage system for a dwelling in La Grange town

  • Conditional on the sanitary permit being issued before the system work.
  • Required for systems in areas not served by a public sewage disposal plant.

  “sanitary permits are required to: install a new system repair an existing system replace or modify an existing system reconnect to an existing system install a privy to comply with state law and county sanitation ordinance requirements”

• Septic inspectionRequired

  Private sewage systems serving dwellings in La Grange town

  • Every three years the county sends a certification form that must be signed by the owner, co-signed by a licensed plumber or licensed septic tank pumper, and returned to the department.
  • The form certifies the system is in proper operating condition and the septic is less than one-third full of sludge and scum.

  inspection interval: 3 years

  “all private sewage systems shall be subject to an on-going inspection program. at three-year intervals the county sanitation department will send you a certification form which must be signed by you and co-signed by a licensed plumber or a licensed septic tank pumper and then returned to the department.”

• Building in a floodplainRequired

  Work in a mapped floodplain in unincorporated La Grange town, under county floodplain zoning (Chapter 50)

  • Applies only to land in a floodplain; the county asks to be contacted before construction where property is near water or in La Grange.
  • Floodplain maps are proposed for update in 2026, per the county page.

  “floodplain land use permit application -this permit must be obtained before starting any work in a floodplain including filling, gratin g and material removal.”

• Permit processPublished (with conditions)

  County zoning permit applications for unincorporated land in La Grange town

  • Applications are for unincorporated areas only; cities and villages use their own permits.
  • Online payment by credit card is available; printed forms are paid by mail or drop-off.

  “note the following applications are for unincorporated areas of monroe county only.”

Still unanswered

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

• Building permit — New construction inside La Grange town
• Owner-builder exemption — Owner-builder construction inside La Grange town
• Inspections — New construction inside La Grange town
• Certificate of occupancy — Occupancy of new dwellings inside La Grange town
• Zoning districts — Chapter 47 zoning districts for unincorporated La Grange town

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.