Bolthole Index

Blue Earth County, Minnesota

Building permits, zoning and land rules in Blue Earth County, Minnesota

51Index Score / 100
#64 of 87 in Minnesota

Blue Earth County, Minnesota requires a county construction permit outside city limits for building, moving, adding onto or structurally altering a structure, except in Lime and Mankato Townships1. Those townships use the City of Mankato for building permits, while Blue Earth County administers septic permitting countywide23. County zoning applies in unincorporated areas except Lime and Mankato Townships4.

At a glance

Building permit
Required outside cities for new, moved, added-to or structurally altered structures; Lime and Mankato Townships use the City of Mankato15
Zoning
County-administered in unincorporated areas except Lime and Mankato Townships; local administration varies elsewhere46
Septic (SSTS) permit
County permit, licensed-designer plan, soil verification and installation inspection required789
Owner-builder exemption
Licensing exemption available for an owner who will occupy the home or retain it as a rental; permits still apply10
Residential lot
At least one acre of usable buildable area, with two suitable private-septic locations identified before a building permit11
RV living
County-regulated campgrounds are seasonal, open at most 7 months a year; private-parcel residential occupancy remains unconfirmed12

Who to call

Building permits

Blue Earth County Property and Environmental Resources Department (Building Permits)

Building permits for unincorporated Blue Earth County townships, except Lime and Mankato Townships

(507) 304-4251

Zoning

Blue Earth County Planning & Zoning

Zoning district questions, permitted and conditional uses, setbacks and lot-area regulations where Blue Earth County administers zoning

(507) 304-4251

410 S. 5th St., Mankato, MN 56001

Septic permits

Blue Earth County Property and Environmental Resources Department (Wells and Septic)

SSTS (septic) design review, soil verification, permitting and inspection countywide

(507) 304-4251

410 S 5th St., PO Box 3566, Mankato, MN 56001

Floodplain permits

Blue Earth County Property and Environmental Resources Department (Floodplain Management)

Floodplain determinations and floodplain-ordinance compliance for unincorporated Blue Earth County

(507) 304-4251

410 S. 5th St., Mankato, MN 56001

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

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Do you need a building permit in Blue Earth County, Minnesota?

Blue Earth County requires a county construction permit outside city limits for building, moving, adding onto or structurally altering a structure; routine re-shingling, re-siding and replacement of windows or doors do not require that county permit1. The county process does not apply in Lime Township, Mankato Township or cities1. Lime and Mankato Townships get building permits from the City of Mankato13. Inside Mankato city, the city issues mechanical and plumbing permits, with a minor-plumbing-repair exception14. North Mankato, which reaches into Blue Earth County but lies mainly in Nicollet County, issues its own building permits, subject to project exceptions15. Blue Earth County Property and Environmental Resources continues to administer septic permits countywide7. The Minnesota State Building Code governs covered work statewide, with conditional exceptions for agricultural buildings1617. An eligible owner-builder may be exempt from residential-contractor licensing when occupying the property or retaining it as a rental, but the exemption does not waive permits or inspections and does not cover construction for resale or speculation10.

Who issues building permits in Blue Earth County, and how do you reach them?

For county-administered townships, call the Blue Earth County Property and Environmental Resources Department at (507) 304-425118. If the land is in Lime Township or Mankato Township, contact the City of Mankato at (507) 387-8600 instead1318. Blue Earth County’s construction permit primarily addresses site setbacks; review can take up to 10 business days or longer and remains valid for one year1. Blue Earth County publishes construction-permit fees, but its construction page and fee schedule disagree on the current residential amount, so confirm the charge before applying19. Ask the applicable city, township or county office which building permits, plans and inspections your project requires; requirements vary by jurisdiction20. Under Minnesota’s occupancy rule, covered buildings cannot be used or occupied before the building official issues a certificate of occupancy; exceptions and temporary certificates may apply21.

Does Blue Earth County have zoning?

Blue Earth County’s Land Use Ordinance regulates unincorporated land; county administration excludes Lime and Mankato Townships224. Lime and Mankato Townships have their own zoning ordinances, and Pleasant Mound Township regulates some uses alongside county zoning6. Mankato city sets its own zoning, while Blue Earth County Property and Environmental Resources handles septic permits countywide237. In county-zoned areas, the applicable district controls building height, lot coverage and impervious surface, but current numeric tables were not confirmed2425. Road setbacks also depend on nearby development: construction cannot move closer to the road centerline than the existing structure on a developed parcel or adjacent structures beside vacant land without meeting the ordinance or obtaining a variance26. Residential lots subject to the county subdivision ordinance need at least one acre of usable buildable area, and a larger lot may be required for sewage treatment11. Call Planning & Zoning at (507) 304-4251 with the parcel number to identify the correct zoning authority and district27.

How do septic (SSTS) permits work in Blue Earth County?

Blue Earth County's Property and Environmental Resources Department administers septic environmental standards and permitting countywide7. Installing a septic system in Blue Earth County requires a county installation permit and an approved design from a licensed septic-system designer8. Before issuing the installation permit, the county requires soil verification, approved design documents, fee payment, an operating-permit application when applicable and a recorded easement agreement when applicable8. County staff inspect the system during installation and issue a certificate of compliance after it passes9. Only 2.7% of Blue Earth County soils are rated “not limited” for a conventional drain field, so do not assume a standard system will fit the parcel before soil verification28. For a new residential lot, identify at least two suitable private-septic locations before the building permit is issued11.

Can you live in an RV or tiny home on your land in Blue Earth County?

Blue Earth County allows county-regulated campgrounds in unincorporated areas to operate seasonally for no more than 7 months per year, with a county land-use development application12. Campground RV wastewater must go to an approved municipal sewer where available or a compliant septic system, never onto the ground; campsites must be outside bluff impact zones and floodplain districts12. These campground standards do not establish permission to live in an RV on a private residential parcel12. We could not confirm residential RV occupancy, temporary camping, tiny-home occupancy or minimum dwelling size; ask the parcel’s zoning authority, starting with Blue Earth County Planning & Zoning for county-zoned land27. County zoning administration excludes Lime Township, Mankato Township and cities4.

Building a home in Blue Earth County, Minnesota: the steps, in order

  1. Identify the building-permit authority: Blue Earth County serves most townships, while Lime and Mankato Townships use the City of Mankato13.
  2. Identify the zoning authority and confirm the district, setbacks, height and lot-coverage rules6262425.
  3. For a land division in unincorporated Blue Earth County, confirm county subdivision approval requirements, buildable area, septic sites and access29.
  4. For a county-road driveway, call Public Works for field review and County Engineer approval before working in the right-of-way3031.
  5. Have a licensed designer prepare the septic plan, complete county soil verification and obtain the installation permit8.
  6. Apply for the construction permit through the office with jurisdiction and confirm the fee and inspection schedule119.
  7. Arrange the septic installation inspection and confirm occupancy approval with the building official where the State Building Code is enforced921.

What to check before you buy land in Blue Earth County, Minnesota

Confirm the building-permit and zoning authorities before relying on a listing's claim that land is buildable136. A new residential lot needs at least 1 acre of usable buildable area and at least 2 suitable private-septic locations before a building permit is issued11. Under Blue Earth County subdivision rules, every lot must adjoin a public street, new lot lines must meet setbacks from existing buildings, and flag or panhandle access to new vacant lots is barred except for the agricultural-preservation exception for existing building sites32. A land split does not guarantee another county-road entrance; county right-of-way access needs review and County Engineer approval31. Check whether the site lies in a county floodway, flood fringe or general floodplain district; county rules may limit development, and a flood-fringe home generally needs fill that places its lowest floor, including the basement, above the 100-year flood level33. Minnesota generally requires well-construction notification and a filing fee; Blue Earth County’s local well requirements remain unconfirmed, so ask Property and Environmental Resources before drilling3435.

Watch-outs

  • Lime Township and Mankato Township are exceptions to Blue Earth County's building-permit and zoning administration: the City of Mankato issues their building permits, and the townships administer their own zoning26.
  • Blue Earth County's construction page and published fee schedule list different residential construction-permit amounts, so confirm the current fee before applying19.
  • A Blue Earth County property split does not guarantee a new county-road access, and working on a driveway or field entrance in the county right-of-way requires County Engineer approval36.
  • Only 2.7% of Blue Earth County soils are rated “not limited” for a conventional septic drain field; the rating does not make septic impossible, but a site evaluation may point to an alternative system28.
  • A flood-fringe home generally must sit on fill high enough that the lowest floor, including the basement, is above the 100-year flood level33.

Sources

  1. Construction Permits, quoted and re-checked
  2. Building Permit Information, quoted and re-checked
  3. Septic Systems, quoted and re-checked
  4. Planning & Zoning, quoted and re-checked
  5. Building Permit Information, quoted and re-checked
  6. Planning & Zoning, quoted and re-checked
  7. Septic System Installation Permits, quoted and re-checked
  8. Septic System Installation Permits, quoted and re-checked
  9. Septic Systems, quoted and re-checked
  10. 2025 Minnesota Statutes, section 326B.805, quoted and re-checked
  11. Blue Earth County Subdivision Ordinance, quoted and re-checked
  12. Code of Ordinances: Chapter 24, Section 24-322, Campgrounds, quoted and re-checked
  13. Building Permit Information, quoted and re-checked
  14. Mankato: Mankato Code § 5-118, Plumbing permit required (Blue Earth County), quoted and re-checked
  15. North Mankato: § 150.02 Building Permits (Blue Earth County), quoted and re-checked
  16. 2025 Minnesota Statutes, section 326B.121, quoted and re-checked
  17. 2025 Minnesota Statutes, section 326B.121, quoted and re-checked
  18. Blue Earth County Property and Environmental Resources Department (Building Permits) (blueearthcountymn.gov)
  19. 2026 Fee Structure.xlsx, quoted and re-checked
  20. Building Permit Information, quoted and re-checked
  21. Minnesota Rules part 1300.0220, quoted and re-checked
  22. Table of Ordinances, quoted and re-checked
  23. Mankato: Mankato Code § 10-95, Minimum lot area (Blue Earth County), quoted and re-checked
  24. Nonconformity Ordinance Amendment, quoted and re-checked
  25. blueearthcountymn.gov, quoted and re-checked
  26. Nonconformity Ordinance Amendment, quoted and re-checked
  27. Blue Earth County Planning & Zoning (blueearthcountymn.gov)
  28. 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
  29. blueearthcountymn.gov, quoted and re-checked
  30. Building Permit Information, quoted and re-checked
  31. Permits, quoted and re-checked
  32. Blue Earth County Subdivision Ordinance, quoted and re-checked
  33. Floodplain Management, quoted and re-checked
  34. 2025 Minnesota Statutes, section 103I.205: Well Construction (Minnesota statewide rule), quoted and re-checked
  35. Blue Earth County Property and Environmental Resources Department (Wells and Septic) (blueearthcountymn.gov)
  36. Permits, quoted and re-checked

Written October 12, 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.

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Compared with neighboring counties

Unlike 4 of its 6 neighbors, Blue Earth County requires a building permit only in limited cases.

RuleBlue Earth CountyFaribault CountyNicollet CountyWaseca CountyWatonwan CountyMartin CountyLe Sueur County
Building permitLimitedRequiredRequiredLimitedRequiredRequiredLimited
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Property & Env. Resources Dept.County Planning & ZoningCounty Planning & ZoningCounty Planning & Zoning Dept.County Land Management Dept.County Planning & ZoningCounty Env. Services

County locator

Blue Earth County in Minnesota

51
County map
Blue Earth County highlighted among the Minnesota counties · colored by Index score

How Blue Earth County scores

Seclusion39100% ev.
Self-Sufficiency32100% ev.
Admin Boringness45100% ev.
Durability64100% ev.
Property Autonomy65100% ev.
Carry Cost61100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$308kTypical home
1%Property tax
$7,755Land / acre
33.2"Annual rain
10.1% of yrsSevere drought
2.9 / yr (+2.8)Mid-century 100°F days
16 daysMid-century dry spell
1.73" (+9.3%)Mid-century 1-day rain
1.71×Wildfire change factor
100%Forward climate coverage
$1,862Home insurance / yr
3.9% / yrInsurance growth
0.27%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
51,081People within 30 min
3,628,851People within 2 hr
64,415Radius comparison (15 mi)
93.6People / sq mi
1.3%Federal land
96.7%Land at 15% slope or less
2.7%Soils rated "not limited" for septic (strict USDA rating)
12,048 acWorkable land screen
8.9%Wooded land
49.4 tonsBiomass / forest ac
45.4°FAvg temp

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Cities and towns in Blue Earth County

Inside a city, town or township here, that government usually sets zoning and may issue its own building permits; the county’s rules above cover land outside them.

Not yet researched: Amboy · Beauford Township · Butternut Valley Township · Cambria Township · Ceresco Township · Danville Township · Decoria Township · Eagle Lake · Garden City Township · Jamestown Township · Judson Township · Le Ray Township · Lime Township · Lincoln Township · Lyra Township · Madison Lake · Mankato Township · Mapleton · McPherson Township · Medo Township · Pemberton · Pleasant Mound Township · Rapidan Township · Shelby Township · Skyline · South Bend Township · St. Clair · Sterling Township · Vernon Center · Vernon Center Township

Answers from the rulebook for Blue Earth County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Blue Earth County rules

  • Building permitLimited

    Building permits in Blue Earth County jurisdictions.

    • All townships except Lime Township and Mankato Township have permits issued through the county Property and Environmental Resources Department.
    • Lime Township and Mankato Township permits are issued by the City of Mankato.
    • City permitting is separately administered by the listed cities.
    • The official page states that requirements may vary and property owners must check whether a permit is required.
    “All townships in Blue Earth County (except Lime Township and Mankato Township) have permits issued through the county’s Property and Environmental Resources Department.”
    2 more reviewed findings on this topic
    • Limited — Building permits in Blue Earth County townships administered through the county.
      “All townships in Blue Earth County (except Lime Township and Mankato Township) have permits issued through the county’s Property and Environmental Resources Department.”
    • Limited — Building permits administered through Blue Earth County for county-administered townships.
      “All townships in Blue Earth County (except Lime Township and Mankato Township) have permits issued through the county’s Property and Environmental Resources Department.”
  • County-wide zoningPresent (with conditions)

    Blue Earth County zoning in unincorporated areas.

    • The county land-use plan states that the county administers the Land Use Ordinance in all unincorporated areas except Mankato Township and Lime Township.
    • The county Planning & Zoning page states that the county is not responsible for planning and zoning within Mankato Township, Lime Township, or any city in Blue Earth County.
    “Blue Earth County administers the Land Use Ordinance in all unincorporated areas of the County, except for Mankato Township and Lime Township.”
    One more reviewed finding on this topic
    • Present (with conditions) — County zoning in unincorporated areas of Blue Earth County.
      “The purpose of this chapter is to promote the health, safety and general welfare of the unincorporated areas of the county by: (1) Regulating the use of land and building(s) for trade, commerce, industry, residence and other purposes;”
  • Local zoningVaries (with conditions)

    Aggregate zoning administration across Blue Earth County, including county-administered unincorporated areas, townships with their own zoning, and incorporated cities.

    • This is an aggregate countywide conclusion and does not mean Blue Earth County administers every local ordinance.
    • Blue Earth County states it is not responsible for planning and zoning within Mankato Township, Lime Township, or any city in the county.
    • The county land-use plan states that Mankato Township and Lime Township have zoning ordinances and that Pleasant Mound Township has a zoning ordinance regulating some land uses while the county also administers zoning regulations there.
    “Mankato Township and Lime Township have zoning ordinances but do not have shoreland and floodplain ordinances. Pleasant Mound Township has a zoning ordinance that regulates some types of land uses, and the County also administers zoning regulations in the township.”
  • Minimum lot sizeSpecified

    Residential lots regulated by the Blue Earth County subdivision ordinance.

    • Residential lots must contain at least one acre of minimum buildable area.
    • The buildable area must be free from rights-of-way, waterways, easements, ravines, or other physical features precluding use of the total lot area.
    • The Planning Commission may require an increased minimum lot size if the County Sanitarian determines it is necessary for on-site sewage treatment systems.
    • At least two suitable locations for a private septic system must be identified before a building permit is issued.

    minimum buildable residential lot area: >= 1 acre

    “Lots used for residential uses shall contain a minimum buildable lot area of one acre.”
  • SetbacksSpecified

    Setbacks in Blue Earth County residential zoning districts and subdivision review.

    • Chapter 24 district standards apply.
    • For developed property, construction must not encroach closer to the road centerline than an existing structure on that property.
    • For vacant property, new structures must not be closer to the roadway centerline than existing structures on immediately adjacent properties.
    • Planning and zoning staff may require County Engineer verification of traffic hazards before issuing a construction permit.
    • A variance is required for construction closer to the centerline than adjacent properties except as permitted by the section.
    “Any construction on a developed property must not encroach closer to the centerline of the road than an existing structure on that property. New structures being proposed on a vacant piece of property must not be constructed closer to the roadway centerline than existing structures on properties immediately adjacent to either side of the vacant property.”
  • Lot coverageSpecified

    Development of nonconforming lots and structures under Blue Earth County Chapter 24.

    • Applicable land-use district lot-coverage and impervious-surface requirements must be met.
    • The opened source did not provide the current numeric table values.
    “All applicable land use district setback, lot coverage, and impervious surface coverage requirements are met.”
  • Building heightSpecified

    Building-height standards under Blue Earth County Chapter 24 zoning.

    • The ordinance purpose includes standards for height and size of buildings.
    • The opened source did not provide the current numeric height tables.
    “Establishing standards for the height and size of buildings, the size of yards, courts and other open spaces and the density of populations;”
  • Living in an RVTemporary only (with conditions)

    Recreational camping vehicle occupancy in county-regulated campgrounds in unincorporated Blue Earth County.

    • A campground land-use development application is required.
    • Sewage must discharge to an approved municipal system if available or to a compliant subsurface sewage treatment system; wastewater from recreational camping vehicles may not be deposited on the ground.
    • Campsites must meet the zoning district setbacks and be outside bluff impact zones and floodplain districts.
    • Recreational camping vehicles and attachments must be separated by at least 10 feet from each other or other structures.
    • Each recreational-vehicle campsite must be at least 2,000 square feet.
    • Recreational camping vehicles must have a current state vehicle license where required.
    • Campgrounds must operate seasonally and may be open no more than seven months per year.

    minimum separation: >= 10 feet (recreational camping vehicles and attachments from each other or other structures) · minimum campsite size: >= 2000 square feet (campsites for recreational camping vehicles) · maximum campground operating period: <= 7 months per year (seasonal operation)

    “Any person proposing a campground shall make a written land use development application to the county. [...] All campsites must be located outside of the flood fringe, floodway, or general floodplain district. [...] All recreational camping vehicles and their attachments shall be separated from each other or other structures by at least ten feet as required by Minnesota Rules Chapter 4630.0400. [...] Campgrounds shall be operated on a seasonal basis and may only be open seven months a year.”
  • Who permits septicCounty

    County administration of septic-system environmental protection standards and permitting in Blue Earth County.

    • The amended county ordinance was adopted and became effective April 27, 2021.
    • The county states that the environmental protection standards have been adopted countywide.
    • County staff perform soil verification, design-plan review, permit issuance, and inspections.
    “The amended ordinance was adopted and became effective April 27, 2021. These environmental protection standards have been adopted countywide.”
    One more reviewed finding on this topic
    • County (with conditions) — County administration of septic-system installation and related SSTS approvals.
      “The installation permit from the department is issued after: Soil verification by the County”
  • Septic permitRequired

    Installation of septic systems under Blue Earth County administration.

    • Installation must follow an approved design from a licensed septic system designer.
    • The installation permit is issued after county soil verification, submission and approval of design requirements, payment of the permit fee, application for an operating permit when applicable, and recording of an easement agreement when applicable.
    • The installation permit is followed by a site inspection; after the system passes inspection, the county issues a certificate of compliance.
    “The installation permit from the department is issued after: Soil verification by the County Design requirements have been submitted and approved Permit fee has been paid Operating permit (when applicable) has been applied for Easement Agreement (when applicable) has been recorded”
    One more reviewed finding on this topic
    • Required — Installation of septic systems in Blue Earth County.
      “Installation of all septic systems must be done according to an approved design from a licensed septic system designer. The installation permit from the department is issued after:”
  • Septic inspectionRequired

    New septic-system installations in Blue Earth County.

    • The site inspection occurs during installation.
    • A certificate of compliance is issued after the system passes inspection.
    “The installation permit is followed by a site inspection during the installation of the septic system. Once the system passes inspection, a certificate of compliance is issued for that system.”
  • Subdividing landRegulated (with conditions)

    Subdivision and lot creation under Blue Earth County Chapter 20.

    • Residential lot dimensions are generally set forth in Chapter 24 zoning unless Chapter 20 specifies otherwise.
    • Every lot must lie adjacent to a public street for fire protection, utilities, and other services.
    • Newly created lot lines must meet required setbacks from existing buildings.
    • Flag or panhandle lots may not provide access to new vacant lots, except for the agricultural-land-preservation circumstance described in the ordinance.
    • The agricultural exception requires a road setback exceeding 250 feet, access to a publicly dedicated road or highway, inclusion in the lot, a minimum width of 33 feet, and exclusion from buildable lot area.

    flag-lot agricultural exception road setback: > 250 feet (agricultural-land preservation split of an existing building site) · flag-lot access width: >= 33 feet (agricultural-land preservation split of an existing building site)

    “Flag lots or panhandle lots shall not be utilized to provide access to new vacant lots. Flag lots may be utilized as a means of preserving agricultural land when splitting off existing building sites where the setback distance from the road exceeds 250 feet. Such access must extend from the lot Lot to a publicly dedicated road or highway, must be included as a portion of the lotLot, must be at least 33 feet wide, and may not be counted as buildable lot area.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Land divisions and subdivisions subject to Blue Earth County Chapter 20.
      “Chapter 20 | Land Division | Property & Environmental Resources”
  • Driveway accessRequired

    Driveways and field entrances within Blue Earth County rights-of-way.

    • A written access permit is required before construction, alteration, or change of use.
    • Applications are reviewed for sight distance, drainage, minimizing entrances, cost, and schedule.
    • Authorization is contingent on County Engineer approval.
    • A property split does not necessarily create a right to a new access for contiguous parcels.
    • Permits are granted for a specific use; a changed use requires a new permit.
    “Authorization of the permit is contingent upon approval by the Blue Earth County Engineer. It is against the law to work on land designated as "right of way" without a permit.”
    One more reviewed finding on this topic
    • Required — Field entrances and residential, commercial, and industrial driveways in Blue Earth County rights-of-way.
      “Authorization of the permit is contingent upon approval by the Blue Earth County Engineer. It is against the law to work on land designated as "right of way" without a permit.”
  • Building in a floodplainLimited

    Construction, development, and use within Blue Earth County Floodway, Flood Fringe, and General Floodplain Districts.

    • The ordinance applies to unincorporated areas within those floodplain districts.
    • Flood-fringe residential buildings are generally allowed only when placed on fill so the lowest floor, including basement, is above the 100-year flood level.
    • The county floodplain ordinance may limit construction, development, and use activities.

    flood-fringe lowest residential floor elevation: above the 100-year flood level (including the basement)

    “Development is normally allowed in the flood fringe provided that residential buildings are placed on fill so that the lowest floor, including the basement, is above the 100-year flood level.”
  • Permit feesPublished (with conditions)

    Published county planning, zoning, construction, and septic fees for county-administered permits.

    • The fee schedule includes after-the-fact fees and additional fees in separate columns.
    • The county construction page separately states construction fees of $250 residential, $350 commercial, and $100 accessory building; the fee-schedule PDF lists different construction amounts, so the applicable current fee should be confirmed with the county.
    • Fees may vary by permit type and may be periodically adjusted.

    construction - new dwelling: 300 USD (fee schedule also lists an after-the-fact amount of $1,000) · construction - commercial/industrial: 350 USD (fee schedule also lists an after-the-fact amount of $1,000) · type I-III septic: 300 USD (fee schedule also lists an after-the-fact amount of $250) · type IV residential septic: 500 USD (fee schedule also lists an after-the-fact amount of $250) · conditional use permit: 900 USD (fee schedule also lists an after-the-fact amount of $450)

    “Construction - New Dwelling $300 $1,000 Construction - Commercial/Industrial $350 $1,000 Demolition Permit No Cost NA”
  • Permit processPartial

    County-administered driveway, septic, and certain township building-permit processes.

    • Building-permit requirements vary by jurisdiction.
    • Driveway applicants initiate the process by calling Public Works; staff conduct field review; staff complete the permit form; County Engineer approval is required.
    • Septic installation permits require approved design, County soil verification, fee payment, and applicable operating-permit and easement steps.
    “Blue Earth County staff will perform a field review to assess the following areas: Appropriate sight distance Adequate drainage Ability to minimize entrances for safety and maintenance purposes Cost Schedule”
    2 more reviewed findings on this topic
    • Partial — Building-permit inquiry and routing in Blue Earth County.
      “All townships in Blue Earth County (except Lime Township and Mankato Township) have permits issued through the county’s Property and Environmental Resources Department.”
    • Partial — County-administered construction, septic, and selected land-disturbance permits in unincorporated Blue Earth County.
      “A construction permit deals primarily with the site setbacks. It can take up to 10 business days from application to permit issuance and sometimes longer. A permit is valid for one year.”

Minnesota rules that apply here

  • Owner-builder exemptionAvailable (with conditions)

    Minnesota residential contractor licensing requirements for owner-builders.

    • The owner must occupy or intend to occupy the property residentially, or retain ownership for rental.
    • The exemption does not apply to resale or speculation.
    • More than one property within 24 months creates a presumption of speculation unless retained for rental.
    • This licensing exemption does not itself waive building permits or inspections.

    speculation presumption period: 24 months (unless properties are retained for rental)

    “This exemption does not apply to an owner who constructs or improves residential real estate for purposes of resale or speculation.”
    One more reviewed finding on this topic
    • Available (with conditions) — An owner of residential real estate who personally builds or improves residential real estate, as an exemption from the residential contractor licensing requirement.
      “The license requirement does not apply to: [...] an owner of residential real estate who builds or improves residential real estate”
  • Building code adoptedAdopted (with conditions)

    Construction, reconstruction, alteration, repair, and use of buildings and other structures of the type governed by the Minnesota State Building Code throughout Minnesota.

    • The State Building Code supersedes the building code of any municipality.
    • The State Building Code does not apply to agricultural buildings except for the state inspections and rulemaking identified in Minnesota Statutes section 326B.121, subdivision 1, paragraph (c), clause (1), and the structural-support requirement for translucent panels or other skylights without raised curbs in clause (2).
    • The 2020 Minnesota State Building Code is effective March 31, 2020, except the Minnesota Mechanical Fuel Gas Code, which is effective April 6, 2020.
    • Municipal enforcement generally requires adoption by local ordinance, subject to statutory requirements for certain municipalities and statutory enforcement responsibilities where no adoption ordinance is in effect.
    • The 2024 Minnesota Commercial Energy Code is effective January 5, 2024.
    • Requirements for adult changing stations are effective August 15, 2025, and requirements for window-cleaning safety features are effective November 7, 2025, according to the Department of Labor and Industry update page.

    2020 Minnesota State Building Code effective date: 2020-03-31 (Minnesota Mechanical Fuel Gas Code effective 2020-04-06) · 2024 Minnesota Commercial Energy Code effective date: 2024-01-05 · Adult changing station supplement effective date: 2025-08-15 · Window-cleaning safety feature supplement effective date: 2025-11-07

    “(a) The State Building Code is the standard that applies statewide for the construction, reconstruction, alteration, repair, and use of buildings and other structures of the type governed by the code.”
    2 more reviewed findings on this topic
    • Adopted — Buildings and structures governed by the Minnesota State Building Code.
      “The State Building Code is the standard that applies statewide”
    • Adopted (with conditions) — Construction, reconstruction, alteration, repair, and use of buildings governed by Minnesota’s State Building Code.
      “The State Building Code is the standard that applies statewide for the construction, reconstruction, alteration, repair, and use of buildings and other structures of the type governed by the code.”
  • InspectionsRequired

    Construction or work for which a Minnesota State Building Code permit is required.

    • The work must remain accessible and exposed until approved.
    • The permit applicant must cause the work to remain accessible and exposed for inspection.
    • The building official identifies required inspections; the permit holder must maintain the inspection record card until final approval.
    • Work may not proceed beyond each successive inspection point without building-official approval; noncomplying portions must be corrected and may not be covered or concealed until authorized.
    “Construction or work for which a permit is required is subject to inspection by the building official”
  • Certificate of occupancyLimited

    Use or occupancy of buildings and structures, and changes in existing occupancy classification, in Minnesota jurisdictions administering and enforcing the State Building Code.

    • A building or structure may not be used or occupied, and an existing occupancy classification may not be changed, until the building official issues a certificate of occupancy under Minnesota Rules part 1300.0220.
    • The rule applies through the building official and therefore depends on the relevant jurisdiction administering and enforcing the State Building Code.
    • Issuance of a certificate of occupancy is not approval of a violation of the code or other municipal ordinances; a certificate purporting to authorize violation or cancellation of those requirements is invalid.
    • A municipality has the option of requiring certificates of occupancy for U occupancies constructed under the International Building Code, accessory structures constructed under the International Residential Code, and used manufactured homes moved into or within a jurisdiction.
    • Legal occupancy of a structure existing on the date of code adoption may continue without change.
    • A temporary certificate may be issued before all permitted work is complete if the occupied portion can be occupied safely; the building official sets its validity period.

    optional certificate category: U occupancies constructed under the International Building Code (municipality has the option of requiring a certificate) · optional certificate category: accessory structures constructed under the International Residential Code (municipality has the option of requiring a certificate) · optional certificate category: used manufactured homes moved into or within a jurisdiction (municipality has the option of requiring a certificate)

    “No building or structure shall be used or occupied, and no change in the existing occupancy classification of a building, structure, or portion of a building or structure shall be made until the building official has issued a certificate of occupancy for the building or structure under this part.”
    One more reviewed finding on this topic
    • Required — Use or occupancy of buildings and changes in occupancy classification under Minnesota Rule part 1300.0220.
      “No building or structure shall be used or occupied [...] until the building official has issued a certificate of occupancy for the building or structure under this part.”
  • Zoning districtsPartial

    Minnesota DNR model floodplain ordinance district classifications, not every local zoning ordinance.

    • The model ordinance identifies floodway, flood fringe, and A Zones (general floodplain) as separate districts.
    • The model ordinance is a model resource; local adoption and local zoning maps determine applicability.
    • This claim does not establish that every Minnesota jurisdiction uses these districts.
    “This model includes the three primary types of floodplain districts: Floodway, Flood Fringe, and General Floodplain. As presented, it incorporates ordinance provisions for a community that has all three districts present on their Flood Insurance Rate Maps. Local communities are encouraged to work with DNR to tailor the language based on the flood districts present in the community.”
  • Camping on your landLimited

    Private or public areas accommodating five or more tents or recreational camping vehicles on a daily, nightly, weekly, or longer basis

    • An annual license from the Minnesota Department of Health is required before establishing, maintaining, conducting, or operating a recreational camping area.
    • The license requires application, payment of the statutory fee, and approval for operation including plan review.
    • A recreational camping area excludes children's camps, industrial camps, migrant labor camps, United States Forest Service camps, state forest service camps, qualifying state wildlife-management or state-owned public-access areas, qualifying temporary holding areas adjacent to motorsports facilities, and a privately owned area used by a private club no more than once annually and no longer than seven consecutive days.
    • A special event recreational camping area operates no more than two times annually and for no more than 14 consecutive days.
    • The statute does not resolve local zoning or land-use requirements.

    minimum accommodated tents or recreational camping vehicles: >= 5 units (Statutory exclusions apply.) · special event operating frequency: <= 2 times annually (Special event recreational camping area.) · special event duration: <= 14 consecutive days (Special event recreational camping area.) · annual license base fee for recreational camping area with 24 or fewer sites: 100 USD (Additional $8 per licensed site; special event areas are excluded from that per-site paragraph.) · annual license base fee for recreational camping area with 25 to 99 sites: 410 USD (Additional $8 per licensed site; special event areas are excluded from that per-site paragraph.) · annual license base fee for recreational camping area with 100 or more sites: 610 USD (Additional $8 per licensed site; special event areas are excluded from that per-site paragraph.)

    “"Recreational camping area" means any area, whether privately or publicly owned, used on a daily, nightly, weekly, or longer basis for the accommodation of five or more tents or recreational camping vehicles free of charge or for compensation. [...] "Special event recreational camping area" means a recreational camping area which operates no more than two times annually and for no more than 14 consecutive days. [...] No person, firm or corporation shall establish, maintain, conduct or operate a manufactured home park or recreational camping area within this state without first obtaining an annual license from the state Department of Health.”
  • Tiny homesLimited

    Construction and residential use of tiny houses statewide, subject to the Minnesota State Building Code and applicable municipal zoning ordinances.

    • The Minnesota State Building Code applies statewide to construction of buildings, including tiny houses.
    • Municipal zoning ordinances vary by municipality and regulate land use, location, height, width, foundation type, number of stories, and building size.
    • The jurisdiction must be consulted for local zoning specifics.
    • Tiny houses used as dwelling units must comply with the Minnesota Residential Code unless otherwise stated in Appendix Q.
    • A tiny house is a dwelling of 400 square feet or less in floor area, excluding lofts.
    • Applicable requirements include light, ventilation, heating, minimum room sizes, ceiling heights, sanitation, toilet, bath and shower spaces, emergency escape and rescue openings, means of egress, smoke alarms, and carbon monoxide alarms.

    maximum tiny-house floor area: <= 400 square feet (lofts excluded) · minimum habitable-space and hallway ceiling height: >= 6.67 feet (6 feet 8 inches) · minimum bathroom, toilet-room, and kitchen ceiling height: >= 6.33 feet (6 feet 4 inches)

    “The Minnesota State Building Code is the standard of construction that applies statewide for the construction of buildings (MS 326B.121) including tiny houses.”
  • Manufactured homesLimited

    New manufactured homes installed for occupancy statewide in Minnesota

    • Inspection is required under Federal Installation Standards Programs, CFR 3285 and 3286.
    • Manufactured-home alterations require documentation submitted for review to the Department of Labor and Industry or the local authority having jurisdiction before work begins.
    • Local building officials and local code enforcement may apply depending on the municipality.
    “All new manufactured homes installed in Minnesota for occupancy are required to be inspected according to the Federal Installation Standards Programs, Code of Federal Regulations (CFR) 3285 and 3286.”
  • Accessory dwellingsLimited

    Temporary family health care dwellings used as a narrow accessory residential dwelling category statewide, where the municipality has not opted out of Minnesota Statutes § 462.3593.

    • The dwelling must be primarily assembled away from its installation site, be no more than 300 gross square feet, lack a permanent foundation, meet state-recognized accessibility standards, provide water and electric utilities, use compatible exterior materials, have at least R-15 insulation, be transportable by the specified truck types, comply with Minnesota Rules chapter 1360 or 1361 with the required seal and data plate or ANSI Code 119.2, and have a backflow check valve.
    • A caregiver or relative must apply for a municipal temporary dwelling permit with the required signatures and documentation, including provider-network proof, medical certification, septic-service documentation, adjacent-owner notice affidavit, and a site map.
    • The dwelling must be on property where the caregiver or relative resides, comply with setbacks and applicable floor-area-ratio limits, and permit safe and timely access for septic services and emergency vehicles.
    • Occupancy is limited to one identified mentally or physically impaired person, and only one temporary family health care dwelling is allowed per lot.
    • The dwelling must comply with applicable state law, local ordinances, and charter provisions unless otherwise provided.
    • The initial permit lasts six months and may be renewed once for an additional six months.
    • The municipality may inspect, revoke the permit for violations, and require removal within 60 days after revocation.
    • Unless otherwise provided by ordinance, the municipality may charge up to $100 for the initial permit and up to $50 for renewal.
    • The municipality may opt out of the statutory requirements by ordinance.

    maximum dwelling area: <= 300 gross square feet · initial permit term: 6 months (renewable once for an additional six months) · maximum initial permit fee: <= 100 USD (unless otherwise provided by ordinance) · maximum renewal permit fee: <= 50 USD (unless otherwise provided by ordinance) · maximum occupants: 1 person (occupant must be a mentally or physically impaired person) · maximum dwellings per lot: 1 dwelling

    “A temporary family health care dwelling that meets the requirements of this section cannot be prohibited by a local ordinance that regulates accessory uses or recreational vehicle parking or storage.”
    One more reviewed finding on this topic
    • Limited — Accessory dwelling units statewide, including conversion of a structure into an ADU, subject to local zoning and Minnesota residential building-code requirements.
      “Local zoning ordinances dictate if a tiny home or accessory dwelling unit (ADU) is allowed on the property.”
  • Off-grid sanitationLimited

    Primitive dwellings using toilet-waste treatment devices in low dwelling-density areas, and privies governed by Minnesota SSTS rules.

    • Septage disposal by the owner must follow local ordinances.
    • If no local ordinance exists, septage must not be discharged to surface waters, drainageways, steeply sloping areas, or wet areas in a manner or volume harmful to the environment or public health or that creates a nuisance.
    • Material must be buried or covered with soil.
    • If site conditions do not meet the rule, solids disposal must be performed under the applicable rule by a licensed maintenance business.
    • Privy solids must be removed when the privy is filled to one-half capacity.
    • Abandoned pits must have sewage solids and contaminated soil removed and be filled with clean earth and slightly mounded.

    privy solids removal threshold: 50 percent capacity

    “For primitive dwellings using toilet waste treatment devices in low dwelling density areas, septage disposal from these devices by the owner must be in accordance with local ordinances. If no ordinance exists, the septage must not be discharged to surface waters, drainageways, steeply sloping areas, or wet areas in a manner or volume that is harmful to the environment or public health or that creates a nuisance. The material must be buried or covered with soil.”
  • Well permitLimited

    Construction of water-supply, dewatering, and environmental wells in Minnesota.

    • A well notification and applicable filing fee are generally required before construction; the statute describes notification rather than a general construction-permit requirement for these wells.
    • A drive-point water-supply well personally constructed by an individual on owned or leased property for farming, agricultural purposes, or the individual's place of abode must be reported within ten days after completion, and no notification fee may be charged.
    • The notification requirement preempts local permits and notifications unless the commissioner has delegated permitting or notification authority under section 103I.111.
    • If operation of the well requires a Minnesota Department of Natural Resources appropriation permit, specified information must be submitted to the commissioner of natural resources and construction may begin after preliminary approval.
    • A well that is not in use must be sealed or have a maintenance permit, subject to the statutory environmental/dewatering-well exception.

    drive-point well notification deadline: 10 days after completion (personally constructed by an individual on owned or leased property for farming, agricultural purposes, or the individual's place of abode) · unused well status: sealed or maintenance permit (environmental or dewatering wells not sealed by 14 months after completion require an annually renewed maintenance permit)

    “Except as provided in paragraph (d), a person may not construct a water-supply, dewatering, or environmental well until a notification of the proposed well on a form prescribed by the commissioner is filed with the commissioner with the filing fee in section 103I.208, and, when applicable, the person has met the requirements of paragraph (e).”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural buildings statewide that meet the definition in Minnesota Statutes § 326B.103, subdivision 3.

    • The structure must be on agricultural land as determined by the governing assessor for the municipality or county under section 273.13, subdivision 23.
    • The structure must be designed, constructed, and used to house farm implements, livestock, or agricultural products under section 273.13, subdivision 23.
    • The building must be used by the owner, lessee, and sublessee and members of their immediate families, employees, and persons engaged in pickup or delivery of agricultural products.
    • The State Building Code does not apply except with respect to state inspections required or rulemaking authorized by sections 103F.141, 216C.19, subdivision 9, and 326B.36.
    • Translucent panels or other skylights without raised curbs must be supported to have equivalent load-bearing capacity as the surrounding roof.
    “The State Building Code is the standard that applies statewide for the construction, reconstruction, alteration, repair, and use of buildings and other structures of the type governed by the code. [...] (c) The State Building Code does not apply to agricultural buildings except: (1) with respect to state inspections required or rulemaking authorized by sections 103F.141; 216C.19, subdivision 9; and 326B.36; and (2) translucent panels or other skylights without raised curbs shall be supported to have equivalent load-bearing capacity as the surrounding roof.”
    One more reviewed finding on this topic
  • county zoning authorityLimited

    County planning and zoning authority over unincorporated areas of Minnesota.

    • The authority applies to a county having less than 300,000 population according to the 1950 federal census.
    • The statute authorizes county planning and zoning activities generally within the qualifying counties; it does not identify a separate unincorporated-area limitation in this section.
    • Except as otherwise provided, a county regardless of population must not enact, amend, or enforce an ordinance eliminating or terminating a lawful use by amortization.
    • The amortization prohibition does not apply to adults-only bookstores, adults-only theaters, or similar adults-only businesses as defined by ordinance.
    • The amortization subdivision does not prohibit nuisance-prevention or nuisance-abatement enforcement or elimination of a use determined to be a public nuisance without payment of compensation.

    population threshold: < 300000 persons (According to the 1950 federal census)

    “having less than 300,000 population according to the 1950 federal census is authorized to carry on county planning and zoning activities.”
  • county building authorityGeneral

    Minnesota counties may administer and enforce the State Building Code within their jurisdiction by ordinance; this includes a county's authority over residential construction in unincorporated county territory, subject to the statutory limits on code application and local provisions.

    • The statutory authorization is to administer and enforce the State Building Code, rather than a county-specific building code.
    • A county that is not already required by Minnesota Statutes § 326B.121, subdivision 2(a), to administer and enforce the code may elect to do so by ordinance.
    • The State Building Code applies statewide to construction, reconstruction, alteration, repair, and use of buildings and structures governed by the code.
    • The State Building Code does not apply to agricultural buildings except for state inspections or rulemaking authorized by Minnesota Statutes §§ 103F.141, 216C.19, subdivision 9, and 326B.36, and except that translucent panels or other skylights without raised curbs must have equivalent load-bearing capacity as the surrounding roof.
    • A municipality may not require building-code provisions regulating structural components or systems that differ from the State Building Code; with state building official approval, it may adopt a more restrictive ordinance where geological conditions warrant it.
    • A municipality may enforce the State Building Code through lawful means, including contracts with other municipalities or qualified individuals; building-permit fees may be retained or remitted to reimburse them.
    “If a municipality is not required by paragraph (a) to administer and enforce the State Building Code, the municipality may choose to administer and enforce the State Building Code within its jurisdiction by adopting the code by ordinance.”

Set by your town or city, not the county

In Minnesota, zoning is adopted by each town or city, so Blue Earth County has no county-wide answer on these. Find your town or city in the list of places on this page, or call its clerk or zoning administrator.

  • Minimum dwelling size
  • Short-term rentals

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Mandatory utility hookup — Water and sewer connection requirements in Blue Earth County.

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.

Living off-grid in Blue Earth County, Minnesota

Is Blue Earth County a good place to live off-grid or homestead?

Blue Earth County scores 51/100 on the Bolthole Index, a solid county profile. Its strengths: a stronger property-autonomy legal backdrop and mixed durability signals. Watch-outs: workable self-sufficiency basics (33.2″/yr rainfall) and about 51,081 people within a 30-minute drive.

Do you need a building permit in Blue Earth County, Minnesota?

Blue Earth County requires a building permit only in limited cases (such as floodplains or specific zones), and it enforces county zoning. Onsite septic is permitted by Blue Earth County Property and Environmental Resources Department. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Blue Earth County, Minnesota?

Land in Blue Earth County runs about $7,755 per acre, based on the latest county data.

What is the water situation in Blue Earth County?

Blue Earth County gets about 33.2" of rain a year, with severe drought in roughly 10.1% of years.

How remote is Blue Earth County?

A representative private-land location has about 51,081 people within a 30-minute drive and 3,628,851 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Blue Earth compares in Minnesota

Compare side-by-side →See all 87 Minnesota counties ranked →