Blue Earth County, Minnesota Building Permit Guide

In the townships of Blue Earth County, the county’s Property and Environmental Resources Department at the Government Center in Mankato issues the construction permit (what most people call the building permit), along with septic, well, shoreland, feedlot and wetland approvals. Lime and Mankato townships and all twelve cities are outside its zoning; the City of Mankato issues construction permits for both townships. A new dwelling permit is $300 under the 2026 schedule, and the county says issuance can take up to 10 business days.

What requires a permit in Blue Earth County?

Outside city limits, Blue Earth County asks for a construction permit whenever a structure goes up, moves, grows or changes shape. Farm buildings are named on the county’s list rather than left off it, and an addition counts even when it is only a deck.

Other work needs its own county approval even where no building is involved. Grading, ice ridge repair or clearing vegetation near a lake or river can need a shoreland permit; installing or replacing a septic system needs an installation permit; drilling, reconstructing or sealing a well needs a well permit; a feedlot of 10 animal units or more needs a feedlot permit. In South Bend Township a land disturbance permit applies to 5,000 square feet of disturbed ground in the residential, townsite, business and industry districts, or 1 acre in the Agriculture and Conservation districts.

What the county decides and what the state holds

The county’s construction permit, in its own words, deals primarily with site setbacks, judged against the zoning, shoreland and floodplain ordinances. Its pages describe no State Building Code plan review or building inspections in the townships it serves. Electrical permits and inspections are a Department of Labor and Industry matter, and contractor and trade licenses are issued by the state, not the county.

Blue Earth County building department: who handles permitting

The Property and Environmental Resources Department, led by Director Michael Stalberger, runs zoning, subdivision, shoreland, floodplain and feedlot programs plus septic, well and wetland permitting. Its zoning reach covers every township except Lime and Mankato, and none of the cities. The assessor’s permit page puts it plainly: in all other townships, permits come through this department.

Cities in Blue Earth County

Each city runs its own zoning and decides for itself about building-code enforcement. The phone numbers below are the city permitting contacts printed on the county assessor’s page, and the flood program column is from FEMA’s Community Status Book.

Blue Earth County permit types

The department’s permit list covers construction permits, variances, conditional use permits, septic installation and operating permits and wetland permits. Interim use permits, shoreland alteration permits, land disturbance permits, plats and land divisions, rezonings and well permits sit on the same fee schedule.

Residential permits

A new house in a township needs a construction permit for the dwelling, a rural address issued before that permit under the 1999 Rural Addressing Ordinance, and a septic installation permit for a system designed by a licensed designer. A new well needs a county well permit, since Blue Earth County has enforced the State Well Code under a 1989 delegation agreement with the state. A detached garage or shed is an accessory building on the fee schedule, while a deck or other addition to the house is a residential addition. Short-term rental of a home needs an interim use permit, allowed in the Agriculture, Conservation, Rural Residence, Rural Townsite, Shoreland and Urban Fringe Overlay districts.

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Commercial and other permits

Commercial and industrial buildings take a separate construction permit category. Uses the ordinance allows only with conditions, such as feedlots, solar and wind energy systems or adult uses, go through a conditional use permit; mining, grading and filling and home occupations use interim use permits. A feedlot of 10 animal units or more needs a county feedlot permit; the county runs the state feedlot rules under an agreement with the Minnesota Pollution Control Agency and counts more than 400 registered feedlots. Recent ordinance updates include mining standards (2026), outdoor storage home occupations, adaptive reuse and elder care standards (2025), and campground, cannabis, nonconforming use, Urban Fringe Overlay and floodplain rules (2024).

What comes before the permit

• Address. The department assigns the rural address before it issues a construction permit for a new dwelling or building site; the address itself carries no fee.
• Septic design and soils. County staff verify soils with the designer, approve the design and may require an operating permit or a recorded easement before the installation permit issues.
• Compliance check. A current septic certificate of compliance must be on file, or an inspection done, when you apply for a building permit, conditional use, variance, shoreland permit or property division.
• Shoreland and floodplain. Land within 1,000 feet of a lake, 300 feet of a river or stream, or the landward edge of a mapped floodplain falls under the shoreland rules; in the flood fringe a house is normally placed on fill with its lowest floor, basement included, above the 100-year flood level.
• Wetlands. The county administers the Wetland Conservation Act outside Mankato, which handles its own, and Public Works handles wetlands in public road right of way.
• Driveway. A new entrance on a county road needs a Public Works permit approved by the County Engineer.

Blue Earth County permit fees

The County Board approved the 2026 Planning and Zoning Fee Schedule on December 16, 2025. The schedule’s second column is an after-the-fact fee, charged in addition to the permit fee when work starts before the permit. Older department pages still quote $700 for a conditional use permit and $600 for a variance; the adopted 2026 figures below replace them.

Worked example from the schedule: a new house in a township with a standard Type I septic system and a new private well pays $300 for the construction permit, $300 for the septic permit and $350 for the well permit, or $950, and the address is free. Starting the house before the permit adds $1,000.

Trade permits and who may pull them

The county issues no electrical, plumbing or mechanical permits. Electrical permits go to the Department of Labor and Industry, whose directory shows whether a city has its own inspection; work filed from August 17, 2026 follows the 2026 National Electrical Code. Contractors, electricians and plumbers hold state licenses.

• Septic work. Designs must come from a licensed septic system designer, and compliance inspections are done by state-licensed inspection businesses; a system with a pretreatment component needs a certified advanced inspector.
• Wells. The county issues the permits to construct, reconstruct and seal wells and borings, issues annual maintenance permits for wells kept out of service, and inspects the work.
• Right-of-way work. Utility work in a county road right of way uses a printed Public Works form returned by email; road closures, oversize transport and annual agricultural permits are filed online.

How to apply for a Blue Earth County permit

Review, corrections and what causes delay

A routine construction permit can take up to 10 business days and sometimes longer. A variance or conditional use request takes 5 to 8 weeks or more. The Planning Commission and Board of Adjustment both meet on the first Wednesday of each month in the Historic Courthouse board room, and the 2026 schedule closes applications at noon about three weeks earlier: the December 2, 2026 meeting took applications until November 12, and the January 6, 2027 meeting until December 17. Conditional use permits then go to the County Board for final action, on December 15 for the December cycle. A missing septic certificate of compliance holds a permit until an inspection is done.

Inspections in Blue Earth County

County field work focuses on sites and systems. Staff inspect new and replacement septic installations, and a system that passes receives a certificate of compliance. Well construction, reconstruction and sealing are inspected under the county’s delegated well program, and feedlot manure applications are checked against county setbacks, which are stricter than the MPCA’s.

A certificate of compliance for a newly installed system is valid for five years; one issued after inspecting an existing system is valid for three. Inspections are tied to events (permits, conditional uses, variances, shoreland permits, property divisions and transfers), not to a yearly cycle, and a current certificate means no new inspection is needed for another permit.

The construction permit is valid for one year. Because the county’s permit is a setback and land use approval, ask the department before building whether any other inspection applies to your project; electrical work is inspected under the state permit.

Minnesota building code

Blue Earth County regulates township land through its zoning, land division, shoreland, floodplain, septic, well, feedlot and stormwater ordinances, restated on Municode and linked from the county’s code page. FEMA’s Community Status Book lists the county as participating in the National Flood Insurance Program since November 24, 1972, with a current flood map dated February 22, 2024; paper flood maps are kept on the Government Center’s second floor.

Minnesota has one State Building Code that applies statewide and overrides local building codes, but enforcement is local: whether a building permit is needed depends on whether the city, township or county enforces the code there. Electrical permits come from the Department of Labor and Industry unless the local government runs its own electrical inspection. Minnesota rules

Blue Earth County permit search and official resources

The county’s property information system shows building and land details, sales and parcel reports, searchable by address or parcel number, and a separate system shows tax history; bulk property data can be requested on the department’s data request form. The assessor’s office receives building permit information from the permitting offices and follows up on permits until work is done. Planning Commission and Board of Adjustment packets and County Board minutes are posted on the county site.

• Blue Earth County planning and zoning
• Construction permits
• Building permit information and city contacts
• 2026 Planning and Zoning Fee Schedule
• County Board minutes, December 16, 2025 (fee schedule approval)
• Data centers and moratorium timeline
• Interim ordinance, data center moratorium (August 25, 2026)
• Shoreland
• Floodplain management
• Land disturbance permit
• Rural addressing
• Septic system installation permits
• Septic compliance inspections
• Wells
• Feedlots
• Wetland permits
• Conditional use permits
• Variances
• 2026 Planning Commission and Board of Adjustment schedule and deadlines
• Public Works permits and driveways
• Property data requests
• County Code of Ordinances
• State electrical permits (DLI)
• FEMA Community Status Book, Minnesota

Blue Earth County permit FAQs

Do I need a county permit for a pole barn on my farm?

Yes. The construction permit list includes agricultural structures, so a farm building outside city limits needs one in the townships the county zones.

I live in Lime Township. Who issues my permit?

The City of Mankato issues construction permits for Lime and Mankato townships, and the county does no zoning there.

Does re-roofing need a county permit?

No. Re-shingling, re-siding and replacing windows or doors need no construction permit from the county.

How much is a permit for a new house?

The construction permit for a new dwelling is $300 under the 2026 schedule; septic and well permits are extra.

How long does a septic certificate of compliance last?

Five years for a newly installed system and three years after a compliance inspection of an existing one.

Who handles wetlands near Mankato?

The City of Mankato for its own jurisdiction, Public Works in county road right of way and the county department everywhere else.

Can a data center apply for a permit right now?

No. The August 25, 2026 interim ordinance stops all data center land use and zoning applications until June 27, 2027 or until new standards are adopted.

Simplify Blue Earth County permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Minnesota. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Blue Earth County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.