Bolthole Index

Watonwan County, Minnesota

Zoning, building permits and septic rules in Lewisville, Minnesota

Lewisville is a city in Watonwan County, Minnesota. Septic permits inside Lewisville come from the county and state together. 4 rules below are quoted from official sources and independently re-checked, most recently on November 5, 2026. Rules for unincorporated land are on the Watonwan County page.

Answers from the rulebook for Lewisville

Rules another office applies inside Lewisville

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

  • Building code adoptedAdopted (with conditions)

    Buildings governed by the State Building Code, including those inside Lewisville city limits.

    • The State Building Code does not apply to agricultural buildings except as stated in Minnesota Statutes, section 326B.121, subdivision 1(c).
    • Lewisville's separate decision whether to administer and enforce the code was not located.
    “The State Building Code is the standard that applies statewide”
  • Who permits septicMixed (with conditions)

    Individual subsurface sewage treatment systems serving land inside Lewisville city limits.

    • Minnesota Pollution Control Agency standards are adopted countywide and administered and enforced by local units of government.
    • Watonwan County's ordinance identifies its Community Health Sanitarian, Planning and Zoning Administrator, or other designated agent as the Department for its ISTS program.
    “The Planning and Zoning Department shall regulate ISTS and septage disposal in Watonwan County pursuant to this section.”
  • Septic permitRequired

    Installation, replacement, alteration, repair, or extension of an individual sewage treatment system inside Lewisville city limits in Watonwan County.

    • No permit is required only for repair or replacement of pumps, floats, other electrical devices of the pump, or septic-tank baffles.
    • Permits are nontransferable and expire nine months after issuance.
    • Property owners doing their own work must comply with the ordinance and execute the stated indemnification agreement; pressurized systems or mounds must be constructed by a licensed installer.

    permit expiration: 9 months after date of issuance

    “A permit shall be obtained whenever any ISTS in Watonwan County is installed, replaced, altered, repaired or extended.”
  • Well permitLimited

    New water-supply wells inside Lewisville city limits.

    • Before drilling, the contractor or owner must submit the notification form and fee to the Minnesota Department of Health.
    • After the notification and fee have been received by the Minnesota Department of Health, work may start.
    • Some other well or boring types require construction permits and written approval before work begins.
    “Prior to the start of drilling a water-supply well, the Contractor or well owner must submit a “notification” form, with the appropriate fee, to MDH.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Lewisville or Watonwan County directly.

  • Owner-builder exemption — Owner-built residential construction inside Lewisville city limits.
  • Local zoning — Land inside Lewisville city limits.
  • Zoning districts — Land inside Lewisville city limits.
  • Minimum dwelling size — Dwellings inside Lewisville city limits.
  • Minimum lot size — Residential lots inside Lewisville city limits.
16 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic inspection
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • 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 Lewisville publishes no rule on the point, not that none exists. Watonwan County’s page lists the county offices to call.

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