Building permits, zoning and land rules in Fillmore County, Minnesota

Fillmore County requires a zoning or land-use permit before covered construction where the county ordinance applies¹. Minnesota's State Building Code applies statewide to buildings governed by the code, but local enforcement varies; a separate structural building permit comes from the building official where the code is administered^2,7. Remodeling or repair and specified concrete or asphalt work are exempt from the county zoning permit, as are portable agricultural buildings on skids; the agricultural exception does not cover every farm building or dwelling¹. Significant construction must begin within one year and the project must be ready for its permitted purpose within two years; otherwise the permit becomes void and reapplication requires a 90-day wait¹. A qualifying owner-builder has a contractor-license exemption, not a permit exemption, and construction for resale or speculation does not qualify⁶.

Start with the Fillmore County Land Use Department at the courthouse in Preston, 507-765-3325, for county zoning and land-use permits³. Land Use also oversees county floodplain, shoreland and septic matters; we could not confirm a countywide structural building-inspection office, so ask Land Use which building official serves the parcel³. Inside city limits, ask the city about building permits and zoning; county zoning applies there only if the municipality adopts the county ordinance, while county septic administration remains relevant unless a qualifying local program applies^1,4. County zoning applications require scaled plans, information and fees, and may be mailed or hand-delivered rather than submitted online⁸. Complete ordinary applications generally take 1–2 days; conditional-use permits and variances typically need 60 days⁸. Credit and debit cards are not accepted⁸. The County Board adopts the fee schedule, and it is posted in the Zoning Administrator's office; the fee is due when the application is submitted¹. The schedule we located is labeled 2022 and lists a $350 septic (SSTS) permit fee for standard, mound, holding-tank and gray-water systems, so confirm current amounts with Land Use^1,9. Starting work before the required zoning permit adds a County Board penalty to the normal fee¹.

Fillmore County zoning applies outside incorporated municipalities and inside municipalities that adopt the county ordinance¹. A township with its own zoning must supply approval documentation before the county application is complete¹. The official map held by the County Auditor and Zoning Administrator determines the parcel's district and overlays¹.

Agricultural dwellings need at least 2.5 buildable acres and cannot occupy wetlands, floodplain or poorly drained areas¹. RA lots need at least one acre and 150 feet of width at the front building line, must front a public road, and may be required to be larger for water treatment and safety; RA setbacks are 30 feet front and 10 feet side and rear¹. New dwellings must be at least 1,000 feet from specified quarry or feedlot boundaries¹. R-1 single-family lots need 10,000 square feet; I-1 industrial lots need one acre¹. B-1 permitted uses have no base minimum lot area, frontage or yards, but overlay standards apply; shoreland lot area follows the underlying district¹.

Agricultural setbacks include 73 feet from road center, 40 feet from right-of-way and 10 feet from property lines; R-1 setbacks are 30 feet front and 10 feet side and rear^1,8. Residential accessory buildings are limited to 10% lot coverage, one story and 15 feet high; R-1 dwellings have a 35-foot height limit¹.

Fillmore County Land Use oversees septic systems; cities and townships may administer qualifying programs at least as stringent as the county's^3,4. New and replacement systems need a septic construction permit before installation and an independent compliance inspection; bedroom-addition inspections apply where the local authority issues permits for those additions^5,10.

In the Shoreland Overlay District, a certificate of inspection from a certified installer is required before a building-permit, variance or rezoning application and before recording a transfer of developed property; the county can do the inspection at the owner's option for a County Board fee, and a nonconforming system must be corrected within 90 days¹. Shoreland development must use public sewer where available; private systems must meet or exceed MPCA standards¹. Planned unit developments must connect to public water and sewer when available, otherwise using compliant centralized on-site systems¹. Manufactured-home parks need water and sewer systems meeting state standards¹. Only 9.9% of county soils lack severe limitations for conventional drain fields, so establish septic feasibility before committing to a homesite¹¹.

Trailers and recreational camping vehicles cannot be permanent dwellings where the Fillmore County zoning ordinance applies¹. In the parts of the county where bluffs are found, temporary placement is allowed for one week, and the same one-week limit applies in a Bluff Impact Zone¹. Regulated campgrounds require a conditional-use permit and must close at least December through February, with no RV, tent or camping-cabin occupancy during closure¹. Vehicles on campsites, even for months at a time, must keep their wheels and current licenses and stay road-ready, and wastewater may not go on the ground¹. We could not confirm a general private-parcel temporary-camping rule outside those settings; ask Land Use before planning to live in an RV while building³.

Minnesota treats a tiny house of 400 square feet or less as a dwelling subject to the State Building Code and local zoning¹². Fillmore County evaluates tiny homes used for habitation under dwelling rules; Agricultural District homes need 2.5 buildable acres, and R-1 homes must meet that district's standards¹. RA and R-1 dwellings must be at least 20 feet wide; that is a width rule, not a minimum floor area, and manufactured homes are excepted from the permanent-foundation requirement¹. Manufactured homes in RA and R-1 also need 20 feet of width¹. Manufactured-home parks require R-1 zoning and a conditional-use permit; manufactured-home site coverage is limited to 50%¹.

1. Ask Land Use to identify the mapped district, overlays and any required township zoning approval¹.

1. Check buildable area, lot width, setbacks, coverage and dwelling dimensions before choosing a home design¹.

1. Ask which building official issues any structural building permit and performs applicable building-code inspections^2,13.

1. Establish septic feasibility, check shoreland sewer availability and obtain septic construction approval before installation^1,5.

1. Resolve access with the road authority: county-road drives require county review, R-1 access drives may be no wider than 22 feet, and new or changed state-highway access needs a MnDOT permit^1,14.

1. Submit scaled plans and current fees for the county zoning permit^1,8.

1. Obtain zoning-administrator approval before floodplain development, including septic systems, fill or excavation¹.

Confirm township approvals and mapped overlays before buying unincorporated Fillmore County land¹. Agricultural land needs buildable acreage outside wetlands, floodplain and poorly drained areas, plus bluffland, shoreland and Decorah Shale review; acreage alone does not establish a usable homesite¹. RA and R-1 new dwellings also face quarry and feedlot separation rules¹. R-1 subdivisions are conditional uses, so ask Land Use about approval before relying on a proposed lot split¹.

Check septic feasibility and shoreland inspection requirements before closing^1,11. Confirm legal access: county-road drives require county review, while state-highway access needs MnDOT approval^1,14. Floodplain approval extends beyond buildings to fill, excavation, storage and utilities¹. Minnesota generally requires a well notification and filing fee before construction, rather than a general well-construction permit, unless an exception applies¹⁵. The county's effective property-tax rate is about 0.9%, and its median annual bill is about $1,932¹¹.