Bolthole Index

Polk County, Minnesota

Zoning, building permits and septic rules in Lengby, Minnesota

Lengby is a city in Polk County, Minnesota. 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 Polk County page.

Answers from the rulebook for Lengby

Lengby’s own rules

  • Building permitRequired

    Any structure built on property within Lengby city limits.

    • Applicant must submit an Application for Building Permit.
    • Applicant must provide a map of the proposed structure.
    • The City Council reviews applications once per month at its City Council meetings.
    “If you plan on building any type of structure on your property within the City of Lengby, you will need to submit an Application for Building Permit.”
  • InspectionsRequired

    New and used mobile homes before the City issues the building permit inside Lengby city limits.

    • Inspection is by a representative of the City.
    • Inspection is before issuance of the building permit.
    • The inspection is to ensure compliance with the State Mobile Home Building Code and the Notice of Compliance Form in Minnesota Statutes 327.31 and 327.32.
    “Prior to issuance of such building permit, the mobile home and lot shall be inspected by a representative of the city to ensure compliance with the Mobile Home Building Code of the State of Minnesota and compliance with the Notice of Compliance Form as contained in Minnesota Statutes 327.31 and 327.32.”
  • Minimum lot sizeSpecified

    Residential lots used for mobile homes inside Lengby city limits.

    • The ordinance applies to new and used mobile homes.
    • Mobile homes are not allowed on commercial property.
    • The ordinance becomes effective after passage and publication and repeals original Ordinance No. 33 at that time.

    lot width: 50 feet (Mobile homes only) · lot depth: 150 feet (Mobile homes only)

    “Mobile homes will be allowed only on 50 feet by 150 feet residential lots.”
  • Permit processPublished (with conditions)

    Applications to build structures inside Lengby city limits.

    • Applicant must fill out the building-permit application and provide a map of the proposed structure.
    • The City Council reviews applications once per month at City Council meetings held on the second Monday of each month at 5:15 p.m. at the Lengby Community Hall.
    “The City Council reviews the applications once per month at their City Council Meetings, which are held on the 2nd Monday of each month, at 5:15 p.m. at the Lengby Community Hall. you will need to fill out an Application for Building Permit and provide a map of the proposed structure.”

Still unanswered

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

  • Owner-builder exemption — Owner-built dwellings inside Lengby city limits, if an applicable Minnesota building-code rule applies.
  • Building code adopted — Construction inside Lengby city limits.
  • Certificate of occupancy — Residential occupancy inside Lengby city limits.
  • Local zoning — Land inside Lengby city limits.
  • Zoning districts — Zoning districts inside Lengby city limits.
20 more unanswered
  • Minimum dwelling size
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • 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 Lengby publishes no rule on the point, not that none exists. Polk County’s page lists the county offices to call.

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