Bolthole Index

Pennington County, Minnesota

Building permits, zoning and septic in Mayfield Township, Minnesota

Mayfield Township's local building-permit issuer and zoning rules could not be confirmed, so ask the township and Pennington County before finalizing plans.12 Pennington County requires septic permits for systems installed, replaced or repaired, through the Pennington Soil and Water Conservation District program.34

At a glance

Building permit
Required for covered work where the state code is enforced; local issuer unconfirmed51
Zoning
Mayfield Township rules not confirmed2
Septic permit
Required for installation, replacement or repair through Pennington SWCD34
Tiny home
Local land-use approval unconfirmed; state residential code applies to dwelling units6
Owner-builder
State contractor-license exemption may apply, but it does not waive permits7
Private well
State notification and fee generally apply before construction8

Who to call

Septic permits

Pennington Soil and Water Conservation District (SSTS Program)

Septic permits for installing, replacing or repairing a system in Pennington County

218-683-7075

201 Sherwood Ave S, Thief River Falls, MN 56701

Planning & zoning

Pennington Soil and Water Conservation District (Shoreland Program)

Shoreland permits and forms for buildings, additions, septic work, grading and filling

218-683-7075

201 Sherwood Ave S, Thief River Falls, MN 56701

Roads & driveways

Pennington County Highway Department (County Engineer's Office)

Approval for construction, driveways and culverts within Pennington County road right-of-way

218-683-7017

250 125th Avenue NE, Thief River Falls, MN 56701

Online permits →

Also useful

Pennington County Auditor-Treasurer's Office

General county administration and secretary to the county board; a starting point when the applicable building or zoning authority is unclear

218-683-7000

101 Main Ave N, Thief River Falls, MN 56701

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Off-grid gear

Going off-grid in Mayfield Township means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Mayfield Township, Minnesota?

Covered construction in a Minnesota jurisdiction that administers the State Building Code requires an application to the building official before work begins, but we could not confirm which official administers building permits in Mayfield Township.91 The permit rule covers construction, enlargement, alteration, repair, moving, demolition and occupancy changes, subject to listed exemptions.5 Ask Mayfield Township to identify the building official serving the parcel before ordering plans or starting work. Agricultural buildings that meet the statutory definition are generally outside the State Building Code, subject to specified exceptions, but that exemption does not settle zoning, septic, floodplain or road-access requirements.10

Who issues building permits in Mayfield Township?

We could not confirm a Mayfield Township building department, designated building official or Pennington County office that issues residential building permits for the township.1 Start with Mayfield Township and use the Pennington County Auditor-Treasurer's Office as a county contact because that office serves as secretary to the county board.11 Where the State Building Code is administered, the building official examines the application and issues the permit when the proposed work conforms to applicable laws and ordinances.12 Local building departments set their own building-permit fees rather than using one statewide fee schedule.13

Does Mayfield Township have zoning?

We could not confirm a Mayfield Township zoning ordinance, zoning map or district schedule.2 Ask the township for parcel-specific answers on residential use, minimum lot size, setbacks, building height, manufactured homes and accessory dwellings rather than applying another Pennington County township's ordinance. Local zoning determines whether a tiny home or accessory dwelling is allowed and can regulate location, foundation type and building size.614 A parcel in a regulated floodplain can also need a floodplain permit for a house, fill, culvert or bridge.15

How do septic permits work inside Mayfield Township?

Pennington County requires a septic permit when a system is installed, replaced or repaired, and Pennington Soil and Water Conservation District administers that process for Mayfield Township.34 The listed application fee is $100, reduced to $25 if the applicant watches the SSTS video on the website.16 New and replacement systems require a compliance inspection, and the local ordinance can control its manner and timing.17 Pennington County soils rate 0% without severe limits for a conventional drain field, so treat soil evaluation and septic design as early feasibility work.18

Can you live in an RV or tiny home in Mayfield Township?

We could not confirm a Mayfield Township rule allowing residential RV occupancy, private-land camping or a tiny home on a particular parcel. A Minnesota tiny house used as a dwelling must comply with the residential code, while local zoning determines whether the use is allowed and may regulate its location, foundation and size.6 New manufactured homes installed for occupancy in Minnesota require a federal-installation inspection.19 State licensing applies to recreational camping areas accommodating five or more tents or recreational camping vehicles, but that rule does not answer whether one RV may be occupied on a private Mayfield Township parcel.20 Ask the township separately about RV occupancy, camping duration and tiny-home land use.

Building a home in Mayfield Township: what are the steps?

  1. Ask Mayfield Township to identify the applicable zoning rules and building official for the parcel; neither could be confirmed.21
  1. Contact Pennington Soil and Water Conservation District for septic design requirements and a county septic permit before installation, replacement or repair.3
  1. Determine the water source; Minnesota generally requires a notification and filing fee before constructing a water-supply well.8
  1. Check floodplain and shoreland status because floodplain construction can require a permit, while county shoreland rules require permits for specified construction and earthwork.1521
  1. Identify the road authority; construction affecting a county right-of-way needs prior approval from the County Engineer's Office.22
  1. Obtain every applicable approval before work and arrange inspections for permitted building and septic work.2324

What should you check before buying land in Mayfield Township?

Get written, parcel-specific answers on zoning, setbacks, dwelling type, RV use and subdivision before treating land as buildable because those Mayfield Township rules could not be confirmed.2 Verify septic feasibility early: countywide soil data rates 0% of soils as avoiding severe limits for conventional drain fields, while Pennington County requires permits for installation, replacement and repair.183 Check shoreland and mapped-floodplain status because those overlays can add permits and design limits.2115 Confirm legal road access and the responsible road authority; a direct state-highway driveway requires MnDOT approval, while construction affecting county right-of-way requires county engineer approval.2522 Pennington County's effective property-tax rate is about 1.2%, and its median annual property-tax bill is about $2,300.2627

Watch-outs

  • Do not assume another Pennington County township's zoning rules apply in Mayfield Township; ask for the ordinance and district map tied to the parcel.2
  • Septic installation, replacement or repair requires a Pennington County septic permit.3
  • A qualifying owner-builder exemption concerns contractor licensing and does not waive building, septic or zoning approvals.7

Sources

  1. Minnesota Administrative Rules, Part 1300.0120 — Permits (2026 county census)
  2. (2026 county census)
  3. Septic System Programs (Mayfield Township), quoted and re-checked
  4. Septic System Programs (Mayfield Township), quoted and re-checked
  5. 1300.0120 Permits (Mayfield Township), quoted and re-checked
  6. Tiny Houses and the 2020 Minnesota Residential Code (Minnesota statewide rule), quoted and re-checked
  7. revisor.mn.gov (Minnesota statewide rule), quoted and re-checked
  8. 2025 Minnesota Statutes, section 103I.205: Well Construction (Minnesota statewide rule), quoted and re-checked
  9. Minnesota Administrative Rules, Part 1300.0120 — Permits (Minnesota statewide rule), quoted and re-checked
  10. Minnesota Statutes § 326B.121, State Building Code; application and enforcement (Minnesota statewide rule), quoted and re-checked
  11. Pennington County Auditor-Treasurer's Office (co.pennington.mn.us)
  12. 1300.0120 Permits (Mayfield Township), quoted and re-checked
  13. Minnesota Building Code Adoption Guide (Minnesota statewide rule), quoted and re-checked
  14. Storage Sheds and the Minnesota State Building Code (Minnesota statewide rule), quoted and re-checked
  15. Floodplain Regulations (Minnesota statewide rule), quoted and re-checked
  16. Septic System Programs (Mayfield Township), quoted and re-checked
  17. revisor.mn.gov (Mayfield Township), quoted and re-checked
  18. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  19. Manufactured home information (Minnesota statewide rule), quoted and re-checked
  20. 2025 Minnesota Statutes, Chapter 327 (Minnesota statewide rule), quoted and re-checked
  21. Pennington Soil and Water Conservation District (Shoreland Program) (penningtonswcd.org)
  22. Pennington County Highway Department (County Engineer's Office) (co.pennington.mn.us)
  23. Minnesota State Building Code (Mayfield Township), quoted and re-checked
  24. Pennington County Septic System Permit Application (Mayfield Township), quoted and re-checked
  25. MnDOT Access Management Manual, Chapter 4 (Minnesota statewide rule), quoted and re-checked
  26. Effective property tax rate: Bolthole Index county data
  27. Median property tax bill: Bolthole Index county data

Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Mayfield Township

Rules another office applies inside Mayfield Township

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

  • Building permitRequired

    Building work inside Mayfield township that is regulated by the Minnesota State Building Code.

    • The rule covers construction, enlargement, alteration, repair, moving, demolition, occupancy changes, and regulated gas, mechanical, electrical, plumbing, or other equipment.
    • Minnesota Rule 1300.0120 contains permit exemptions, including certain small accessory structures, fences, ordinary repairs, and other listed work.
    “An owner or authorized agent who intends to construct, enlarge, alter, repair, move, demolish, or change the occupancy of a building or structure [...] shall first make application to the building official and obtain the required permit.”
  • Owner-builder exemptionAvailable (with conditions)

    An owner of residential real estate undertaking residential construction or improvement inside Mayfield township.

    • The owner must occupy or intend to occupy the property for residential purposes, or retain ownership for rental purposes after completion.
    • The exemption does not apply when the owner constructs or improves residential real estate for resale or speculation.
    • More than one property within any 24-month period creates a presumption of speculation unless the properties are retained for rental purposes.
    “The license requirement does not apply to: [...] an owner of residential real estate who builds or improves residential real estate”
    One more reviewed finding on this topic
    • Available (with conditions) — An owner-builder performing residential construction inside Mayfield township.
      “The license requirement does not apply to: [...] (3) an owner of residential real estate who builds or improves residential real estate if the owner occupies or will occupy the residential real estate for residential purposes, or will retain ownership for rental purposes upon completion of the building or improvement. This exemption does not apply to an owner who constructs or improves residential real estate for purposes of resale or speculation.”
  • Building code adoptedAdopted

    Buildings and structures inside Mayfield township to which the Minnesota State Building Code applies.

    • The State Building Code governs only buildings and structures to which the code is applicable.
    • Agricultural buildings are excluded except for the statutory inspection, rulemaking, and skylight exceptions.
    “The State Building Code is the standard that applies statewide”
    One more reviewed finding on this topic
    • Adopted (with conditions) — Construction, reconstruction, alteration, and repair of buildings and other structures in Mayfield township that are governed by the Minnesota State Building Code.
      “The State Building Code is the standard that applies statewide for the construction, reconstruction, alteration, and repair of buildings”
  • InspectionsRequired

    Buildings in Mayfield township for which a Minnesota State Building Code permit is issued.

    • Some form of on-site compliance inspection is required whenever a building permit is issued.
    • The State Building Code defines required inspections and permits the building official to require more specific inspection conditions or specialized inspectors.
    “Some form of on-site compliance inspection is required whenever a building permit is issued.”
  • Certificate of occupancyRequired

    Use or occupancy of buildings inside Mayfield township governed by Minnesota Rules chapter 1300.

    • No building or structure may be used or occupied, and no occupancy classification may be changed, until the building official issues a certificate of occupancy.
    • A municipality has the option of requiring certificates for U occupancies, accessory structures under the International Residential Code, and used manufactured homes moved into or within a jurisdiction.
    • Existing legal occupancy may continue without change.
    “until the building official has issued a certificate of occupancy for the building or structure under this part.”
  • Who permits septicCounty (with conditions)

    Septic systems inside Mayfield township, administered through the Pennington County program identified by the Pennington Soil and Water Conservation District.

    • The source states that Pennington County requires septic permits; it does not identify a separate Mayfield township septic program.
    “Pennington County requires permits for septic systems being installed, replaced or repaired. Download the PDF below or come into the office for a permit application.”
  • Septic permitRequired

    Installation, replacement, or repair of septic systems inside Mayfield township through the Pennington County SSTS program administered with the Pennington SWCD.

    • The application states that work must not start without a permit.
    • The permit application fee is $100, reduced to $25 if the applicant watches the SSTS video on the website.
    • Minnesota Rules require permits for all new construction and replacement SSTS.

    permit fee: 100 USD ($25 if applicant watches the SSTS video on the website)

    “Pennington County requires permits for septic systems being installed, replaced or repaired.”
    One more reviewed finding on this topic
    • Required — Installation, replacement, or repair of septic systems inside Mayfield township.
      “Pennington County requires permits for septic systems being installed, replaced or repaired. Download the PDF below or come into the office for a permit application.”
  • Septic inspectionRequired

    New construction or replacement of a subsurface sewage treatment system inside Mayfield township.

    • The manner and timing of inspection may be determined by the applicable local ordinance.
    • A bedroom addition generally requires an inspection and certificate of compliance or notice of noncompliance.
    • The bedroom-addition inspection may be temporarily waived for applications from November 1 through April 30 if the inspection occurs by June 1 and the required document is submitted within 15 days.
    “An inspection shall be required for all new construction or replacement of a system”
    2 more reviewed findings on this topic
    • Required — New construction and replacement subsurface sewage treatment systems inside Mayfield township.
      “A compliance inspection for all new construction or replacement must be conducted:”
    • Required — SSTS construction inside Mayfield township under the Pennington County SSTS program.
      “I also understand that by submitting this application, I am consenting to allow the Pennington SWCD to inspect and verify that all information in the application is complete and correct; and to conduct inspections before, during and after construction for compliance with the permit and the Pennington County Sewage and Wastewater Treatment Ordinance.”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural buildings inside Mayfield township that qualify under the Minnesota State Building Code.

    • The State Building Code does not apply to agricultural buildings.
    • State inspections and authorized rulemaking under the listed statutes still apply.
    • Translucent panels or skylights without raised curbs must have equivalent load-bearing support.
    “The State Building Code does not apply to agricultural buildings except:”
  • Building in a floodplainRequired

    Development inside mapped floodplain areas within Mayfield township.

    • The requirement applies to projects in portions of a floodplain governed by the community floodplain-management ordinance.
    • The local community ordinance controls the specific standards and exceptions.
    “Construction and fill is generally permitted in portions of the floodplain, provided they adhere to their community’s floodplain management ordinance. Such projects as building a house, placement of fill, or installing a culvert or bridge would all require a floodplain permit.”
  • Permit processPublished (with conditions)

    Applications for Minnesota State Building Code permits inside Mayfield township.

    • Applications must identify the work, identify the land, state intended use and occupancy, indicate construction type, include required construction documents, state valuation, be signed, and provide other required information.
    • The building official examines the application and issues the permit when the work conforms to applicable laws and ordinances.
    “To obtain a permit, the applicant shall file an application in writing on a form furnished by the Department of Building Safety for that purpose.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Mayfield Township or Pennington County directly.

  • Local zoning — Land inside Mayfield township.
  • Zoning districts — Zoning districts inside Mayfield township.
  • Minimum dwelling size — Minimum dwelling size inside Mayfield township.
  • Minimum lot size — Minimum lot size inside Mayfield township.
  • Setbacks — Building setbacks inside Mayfield township.
14 more unanswered
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Subdividing land
  • Driveway access
  • 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 Mayfield Township publishes no rule on the point, not that none exists. Pennington County’s page lists the county offices to call.

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