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

Unincorporated Mower County requires a county zoning permit to construct or place any structure where county zoning applies¹. Published zoning fees are $75 for agricultural or accessory structures and $150 for residential structures; after-the-fact permits cost 1.5 times the base fee¹. Conditional-use, variance and rezone applications each cost $600 plus $46 and use separate application packets and public-hearing processes¹.

The Minnesota State Building Code applies statewide to covered buildings, with local enforcement determined by jurisdiction¹¹. Code-regulated construction, alteration, repair, moving, demolition and occupancy changes require the applicable building official’s permit². Permitted work must remain exposed until inspected and approved; the person doing the work must notify the building official when ready and make an inspection record card available¹². Code-governed buildings generally require a certificate of occupancy before use, with limited exceptions and temporary certificates for safe portions¹³. Agricultural buildings are generally exempt from the state code, subject to specified state inspections, rulemaking and skylight-support requirements; Mower County’s zoning-permit requirement still applies^1,11.

Mower County Environmental Services handles county zoning and land-use permits, septic systems, water planning and floodplain management³. The office is at 1105 8th Ave NE, Austin, MN 55912; call 507-437-7718 or email zoning@co.mower.mn.us³. Completed county zoning applications and drawings may be emailed to that address¹. A county-administered building-inspection program could not be confirmed; ask Environmental Services to identify the building official serving the parcel³.

A Mower County owner building or improving residential property for personal occupancy or continued rental ownership may qualify for Minnesota’s residential-contractor license exemption; building for resale or speculation does not qualify⁸. Improving more than one property within a 24-month period creates a presumption of speculation unless the properties will be retained for rental⁸. The license exemption does not waive zoning permits, applicable building-code requirements or septic approvals¹⁴.

Mower County zoning applies outside incorporated municipal limits; Austin sets its own zoning inside city limits^5,6. Mower County Environmental Services remains the county septic authority, including for systems in municipally sewered areas^4,15.

Mower County has district-specific uses and dimensional standards, plus shoreland and floodplain overlays¹⁶. In the Rural Residence (R-1) District, lots generally need at least 1 acre, 125 feet of width and 200 feet of depth, with a 25-foot front setback from the right-of-way, 5-foot side yards and a 20-foot rear yard, subject to ordinance exceptions¹⁶. The cited height provision caps nonagricultural buildings at 35 feet and exempts agricultural buildings¹⁶. Rural Management (RM) incorporates Agricultural District lot, yard, setback, access and height requirements and their exceptions, including a 40-foot front setback and 20-foot side and rear setbacks¹⁶.

Dwellings are prohibited in wetlands and floodways, and the ordinance restricts dwellings on peat or muck soils⁶. Ask Environmental Services to confirm the parcel’s district, overlays and applicable exceptions before choosing a house site³.

Mower County Environmental Services administers septic permitting and inspections⁴. Covered installations, alterations, repairs and extensions need a county permit, valid for 12 months with a possible extension of up to 6 months⁴. The published construction-permit fee is $550 for Type I, II or III residential systems up to 2,500 gallons per day; other systems require the full fee schedule¹⁷.

New systems require inspection, and a property transfer triggers compliance inspection when no current Certificate of Compliance is on file^4,15. Zoning applications also trigger inspection in shoreland areas, on undersized lots, and for systems at least 20 years old without a current certificate; bedroom or qualifying water-use increases are additional triggers¹⁵. Only about 1.3% of mapped Mower County soils are rated without severe limitations for a conventional drain field, so evaluate septic feasibility before fixing the house location¹⁸.

Existing septic systems in municipally sewered areas must remain compliant, with inspection by a licensed inspector at the owner’s expense¹⁵. A failed inspection requires sewer connection unless the municipality confirms in writing that service cannot be provided; a septic replacement may then be allowed¹⁵. Holding tanks cannot continue there without a written municipal exception⁴.

A Mower County rule allowing residential or long-term RV occupancy on a private parcel could not be confirmed. Ask Environmental Services whether the use is allowed in the parcel's zoning district and what sewage arrangement is acceptable before moving an RV onto the land³.

A tiny house used as a dwelling must comply with the Minnesota Residential Code, while local zoning decides whether the use and location are allowed⁷. Mower County requires a zoning permit to construct or place a structure where county zoning applies¹. A countywide minimum dwelling size could not be confirmed; ask Environmental Services about the parcel's district before choosing a design³. A general off-grid sanitation allowance could not be confirmed³.

1. Confirm whether county or municipal zoning applies, then ask Environmental Services for the zoning district, overlays, allowed use and site standards^3,6.

1. Arrange septic evaluation and design early because only about 1.3% of county soils are rated without severe limitations for a conventional drain field¹⁸.

1. Identify the applicable building official and confirm the building-code permit requirements before starting^2,3.

1. Submit the county zoning application and drawings; separate packets apply to conditional uses, variances and rezones⁶.

1. Check the county floodplain overlays; new structures, land uses, construction, expansion, conversion and structural alterations there must comply with the floodplain ordinance⁶.

1. Arrange required inspections for permitted work, keep it exposed until approval and obtain required occupancy approval before moving in^12,13.

1. If the driveway connects to a county highway, use the Highway Department's GeoPermits service¹⁰.

Start by confirming whether county or municipal zoning applies, then obtain the parcel's zoning district and overlay information⁶. Test septic feasibility before treating a rural lot as buildable because only about 1.3% of county soils are rated without severe limits for a conventional drain field¹⁸. Check the floodplain overlays because new structures and other development there must comply with the county floodplain ordinance, and critical facilities are prohibited in those districts⁶.

Verify legal road access and contact the correct road authority because added access to a public highway is subject to regulation and a permit from that authority¹⁹. Mower County's Highway Department offers county driveway and access applications through GeoPermits¹⁰. Minnesota generally requires state notification and a filing fee before water-supply well construction, with exceptions and possible delegated local authority; ask Environmental Services who administers the parcel’s well requirements^3,9. The median property-tax bill is about $1,819 per year¹⁸.