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Blue Earth County, MN Building Safety: Building Permits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Permit trigger
any building addition 120+ sq ft
Demolition permit
dwellings, structures 800+ sq ft
Permit validity
12 months from issuance
Issuing office
county zoning administrator
Unpermitted work
after-the-fact fee owed
Violation penalty
up to $1,000 fine or 90 days

Summary

In unincorporated Blue Earth County, no one may erect, alter, or move a building or its part without first getting a construction permit from the county zoning administrator. Structures under 120 square feet skip the permit but must still meet the code's setback and construction standards. A separate demolition permit covers residential dwellings and any structure 800 square feet or larger.

These county ordinances apply to unincorporated areas of Blue Earth County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

(1)Required. ... Hereafter, no person shall erect, alter or move any building or its part without first securing a construction permit. No construction permit shall be issued until a land use development application has been accepted by the zoning administrator. Structures less than 120 square feet do not require a construction permit; but shall be constructed according to the appropriate setbacks and standards of this chapter. ... (5)Invalidation of permit. A construction permit shall become invalid after 12 months of issuance. (b)Demolition permit; required. Hereafter, no person shall demolish a residential dwelling, or any other structure 800 square feet or more in area, or clearing any building site or farmstead without first obtaining a demolition permit from the zoning administrator.

Full Breakdown

The permit requirement sits in Blue Earth County Code Sec. 24-43, part of the county's zoning enforcement structure in chapter 24, article II. Before the zoning administrator can issue a construction permit, the applicant must first have an accepted land use development application, plus a scaled site plan showing lot dimensions and the size and location of the building and any accessory buildings. The zoning administrator issues the permit only after confirming the application is complete, the lot is buildable, and the plan complies with the chapter's use, setback, and dimensional standards for the applicable district, whether Agriculture, Conservation, Rural Residence, Rural Townsite, or one of the business and industry districts.

Once issued, a construction permit is only good for 12 months; if work has not begun by then, the property owner must reapply. Anyone who builds, alters, or moves a building without first securing the permit does not escape the requirement. Instead they owe an after-the-fact permit fee set by the county board's fee schedule, on top of still needing the permit. Demolition is handled separately under Sec. 24-43(b): no one may demolish a residential dwelling, or any other structure of 800 square feet or more, or clear a building site or farmstead, without first getting a demolition permit from the zoning administrator. The zoning administrator's office itself, created by Sec. 24-41, is also charged with keeping permit records and inspecting properties for compliance.

Violations & Fines

Building without the required permit, or violating any permit condition, is a misdemeanor under Sec. 24-44(a), punishable by a fine of up to $1,000.00, up to 90 days in jail, or both, with each day of continued violation a separate offense. The zoning administrator can also issue a stop-work order; ignoring it is itself a misdemeanor, and the property owner has ten business days to appeal a stop-work order to the board of adjustment under Sec. 24-48.

Frequently Asked Questions

Do I need a permit to build a shed in unincorporated Blue Earth County?
Only if it's 120 square feet or larger. Smaller structures skip the construction permit under Sec. 24-43(a)(1), but they still have to meet the district's setback and construction standards, so check the rules for your zoning district before you build.
How long does a Blue Earth County construction permit last?
Twelve months from the date it's issued. If you haven't started construction within that year, the permit becomes invalid under Sec. 24-43(a)(5) and you'll need to apply again with the zoning administrator before resuming work.
What if I already built without getting a permit?
You still owe the county an after-the-fact permit fee set by the board of commissioners' fee schedule under Sec. 24-43(a)(4), and you remain subject to misdemeanor penalties under Sec. 24-44 of up to $1,000.00 or 90 days in jail for building without the required permit.
Do I need a separate permit to tear down a building?
Yes, if it's a residential dwelling or any structure 800 square feet or larger. Section 24-43(b) requires a demolition permit from the zoning administrator before you demolish that kind of structure or clear a building site or farmstead in unincorporated Blue Earth County.

Sources & Official References

Other rules in Blue Earth County

All Blue Earth County rules

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