Bolthole Index

Yellow Medicine County, Minnesota

Zoning, building permits and septic rules in St. Leo, Minnesota

St. Leo is a city in Yellow Medicine County, Minnesota. 5 rules below are quoted from official sources and independently re-checked, most recently on November 5, 2026. Rules for unincorporated land are on the Yellow Medicine County page.

Answers from the rulebook for St. Leo

Rules another office applies inside St. Leo

St. Leo 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)

    Construction, reconstruction, alteration, repair, and use of buildings and structures governed by the State Building Code, including those inside St. Leo city limits.

    • The statute states that the State Building Code does not apply to agricultural buildings except for the listed state-inspection or skylight provisions.
    • This claim concerns statewide code applicability; no St. Leo ordinance adopting or administering the code was located.
    “The State Building Code is the standard that applies statewide”
  • Septic permitRequired

    New construction and replacement of subsurface sewage treatment systems inside St. Leo city limits, where an SSTS is used.

    • The local unit of government must enforce its SSTS ordinance through a permitting program.
    • The local unit may require permits for all or certain repair types.
    • Construction must not begin until a construction permit is granted; final approval is shown by a certificate of compliance.
    “Permits must be required for all new construction and replacement.”
  • Septic inspectionLimited

    Permit review and certification for SSTS construction or replacement inside St. Leo city limits, where an SSTS is used.

    • The cited rule requires infield verification of periodically saturated soil or bedrock before issuance of a certificate of compliance.
    • An advanced inspector is required for Type IV and Type V ISTS, ISTS design flow greater than 2,500 gallons per day, and MSTS.
    • This is not evidence of a periodic inspection requirement for every existing system.
    “The infield verification of the periodically saturated soil or bedrock must occur prior to issuance of the certificate of compliance.”
  • Agricultural exemptionConditional

    Agricultural buildings inside St. Leo city limits.

    • The State Building Code does not apply to agricultural buildings except for the statute's listed state-inspection or skylight provisions.
    • This does not establish whether St. Leo has a separate local agricultural exemption.
    “The State Building Code does not apply to agricultural buildings except:”
  • Permit processPublished (with conditions)

    Applications for State Building Code permits for code-regulated work inside St. Leo city limits.

    • The application must be in writing on a Department of Building Safety form.
    • It must identify and describe the work, describe and locate the land, state intended use and occupancy, indicate construction type, include required documents, state valuation, be signed, and provide other data required by the building official.
    • This statewide process does not identify St. Leo's administering building official.
    “To obtain a permit, the applicant shall file an application in writing”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask St. Leo or Yellow Medicine County directly.

  • Owner-builder exemption — Owner-built residential construction inside St. Leo city limits.
  • Inspections — Building work inside St. Leo city limits.
  • Certificate of occupancy — Building occupancy inside St. Leo city limits.
  • Local zoning — Land inside St. Leo city limits.
  • Zoning districts — Zoning districts inside St. Leo city limits.
19 more unanswered
  • Minimum dwelling size
  • Minimum lot size
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • 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 St. Leo publishes no rule on the point, not that none exists. Yellow Medicine County’s page lists the county offices to call.

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