Unincorporated Mower County, Minnesota requires a county zoning permit for construction or placement of a structure, but a countywide building-code permit and inspection program could not be confirmed.1 Mower County Environmental Services administers zoning, septic systems and floodplain management, making it the first office to contact before planning a rural build.2
At a glance
- Structure permit
- County zoning permit required; ask who handles building-code review13
- Zoning
- County zoning applies outside incorporated municipalities4
- Septic
- County permit required for covered residential systems5
- RV living
- Long-term private-land occupancy not confirmed; ask Environmental Services2
- Tiny home
- No specific occupancy rule confirmed; zoning and septic review still apply67
- Owner-builder
- State contractor-license exemption may apply, but permits are not waived8
- Well permit
- County requirement not confirmed; ask Environmental Services who has jurisdiction2
- County-road access
- Driveway and access applications are available through GeoPermits9
Who to call
Planning & zoning
Mower County Environmental Services
Zoning and land-use permits, septic systems, water planning and floodplain management in Mower County
1105 8th Ave NE, Austin, MN 55912
Zoning
Mower County Environmental Services — Zoning and Land Use
Zoning permits, land-use applications, zoning maps and parcel-specific setback questions
Septic permits
Mower County Environmental Services — Septic Systems
Mower County subsurface sewage treatment system information and permitting
1105 8th Ave NE, Austin, MN 55912
Roads & driveways
Mower County Highway Department
Driveway or access permits, addressing and moving permits available through GeoPermits
1105 8th Ave NE, Austin, MN 55912
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in Mower County, Minnesota?
A zoning permit is required before constructing or placing a structure on property administered by Mower County.3 The county publishes zoning-permit fees of $75 for an agricultural or accessory structure and $150 for a residential structure; after-the-fact permits cost one and one-half times the base fee.10
Do not confuse that zoning approval with a building-code permit. A countywide Mower County building-code permit and inspection program could not be confirmed, even though the Minnesota State Building Code is the statewide standard for covered construction.111 Before hiring a contractor or ordering materials, ask Environmental Services which city, township or building official—if any—will review the construction code for the parcel.2 Work for which a Minnesota State Building Code permit is required is subject to inspection by the building official.12
Who handles Mower County permits, and how do you reach them?
Mower County Environmental Services is the county contact for zoning and land-use permits, septic systems, water planning and floodplain management.2 Its office is at 1105 8th Ave NE, Austin, MN 55912; call 507-437-7718 or email [email protected].2 Completed zoning applications and drawings may be emailed to the zoning address.13
Environmental Services is not presented here as a conventional building department because countywide building-code administration could not be confirmed. Ask the office to identify any separate building official for the parcel before construction.1 Minnesota lets a qualifying owner personally build or improve residential real estate intended for occupancy or rental without a residential-contractor license, but the exemption does not apply to building for resale or speculation and does not waive applicable permits or inspections.8
Does Mower County have zoning?
Yes. The Mower County zoning ordinance applies outside incorporated municipal limits.4 Incorporated-city parcels may be governed by their municipality instead, so confirm the parcel's jurisdiction before relying on county forms.4
The county ordinance uses multiple zoning districts with district-specific permitted uses, conditional uses, dimensional standards, floodplain rules and shoreland rules.14 That means there is no safe single answer for setbacks, minimum lot size, building height or lot coverage without identifying the parcel and district. Those numeric standards could not be confirmed for this guide; ask Environmental Services for a zoning-map check and the current standards that apply to the proposed homesite.2 The county also requires applicable state and federal permits before granting a county permit or processing a conditional-use permit or variance.13
How do septic permits work in Mower County?
Mower County Environmental Services administers the county subsurface sewage treatment system program.7 A permit to construct is required for covered residential systems, and the published charge is $550 for Type I, Type II or Type III residential systems designed for up to 2,500 gallons per day; other system types may have different fees.5
Septic feasibility deserves attention before the house location is fixed because only about 1.3% of mapped Mower County soils are rated without severe limitations for a conventional drain field.15 That countywide soil statistic does not decide an individual site, but it supports arranging a site evaluation early.15 In municipally sewered areas, continued use of an individual or cluster septic system requires constant compliance, and a holding tank may continue only when the municipality specifically allows it and notifies the county in writing.1617
Can you live in an RV or tiny home in Mower County?
A county rule allowing residential or long-term RV occupancy on a private Mower County parcel could not be confirmed. Ask Environmental Services whether the proposed use is allowed in the parcel's zoning district and how sewage must be handled before moving an RV onto the land.2 Minnesota's recreational-camping-area license applies to an area accommodating at least five tents or recreational camping vehicles; that statewide rule does not resolve occupancy of one RV on a private lot.18
A specific Mower County tiny-home occupancy rule and a countywide minimum dwelling size also could not be confirmed. A tiny house is still a structure subject to the county zoning-permit process where county zoning applies, and a dwelling using onsite wastewater must satisfy the applicable septic requirements.37 A new manufactured home installed for occupancy in Minnesota must be inspected under the federal installation standards program.19
Building a home in Mower County: the steps, in order
- Confirm that the parcel is outside an incorporated municipality and ask Environmental Services to identify its zoning district, overlays, allowed use and site standards.42
- Arrange septic evaluation and design early because only about 1.3% of county soils are rated without severe limitations for a conventional drain field.15
- Submit the county zoning-permit application and drawings, and obtain required state and federal approvals before county approval.13
- Ask Environmental Services who administers the Minnesota State Building Code for the parcel because a countywide Mower County program could not be confirmed.1
- Check floodplain status; a house, fill, culvert or bridge in a Minnesota floodplain requires a floodplain permit under the community ordinance.20
- If the driveway connects to a county highway, apply through the Highway Department's GeoPermits service.9
What should you check before buying land in Mower County?
Start by confirming whether county or municipal zoning applies, then obtain the parcel's zoning district and overlay information.4 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 field.15 Check mapped floodplain before planning a house, fill, culvert or bridge, since those projects require a local floodplain permit when placed in a Minnesota floodplain.20
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 authority.21 Mower County's Highway Department offers county driveway and access applications through GeoPermits.9 A county well-permit rule could not be confirmed, so ask Environmental Services which well authority applies before relying on a proposed water source.2 The median property-tax bill is about $1,819 per year.22
Watch-outs
- A Mower County zoning permit does not by itself confirm that no separate building-code permit or inspection applies; ask Environmental Services to identify the building official for the parcel.12
- Only about 1.3% of mapped county soils are rated without severe limitations for a conventional septic drain field, so make onsite-wastewater feasibility an early purchase contingency.15
- Floodplain work can require a permit not only for a house but also for fill, excavation or material storage.23
Sources
- Mower County - Septic Systems (2026 county census)
- Mower County Environmental Services (co.mower.mn.us)
- Mower County Environmental Services — Zoning and Land Use (co.mower.mn.us)
- Mower County Zoning Ordinance, quoted and re-checked
- Septic Systems, quoted and re-checked
- Mower County Zoning Ordinance (2026 county census)
- Mower County - Septic Systems (2026 county census)
- Sec. 326B.805 MN Statutes (Minnesota statewide rule), quoted and re-checked
- Mower County Highway Department (co.mower.mn.us)
- Zoning and Land Use Permits, quoted and re-checked
- 2025 Minnesota Statutes, section 326B.121 (Minnesota statewide rule), quoted and re-checked
- 1300.0210 INSPECTIONS (Minnesota statewide rule), quoted and re-checked
- Zoning and Land Use Permits, quoted and re-checked
- Mower County Zoning Ordinance, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Mower County SSTS Ordinance, quoted and re-checked
- Mower County SSTS Ordinance, quoted and re-checked
- 2025 Minnesota Statutes, Chapter 327 (Minnesota statewide rule), quoted and re-checked
- Manufactured home information (Minnesota statewide rule), quoted and re-checked
- Floodplain Regulations (Minnesota statewide rule), quoted and re-checked
- Minnesota Statutes, section 160.18: Access to roads; approaches (Minnesota statewide rule), quoted and re-checked
- Median property tax bill: Bolthole Index county data
- Mower County Zoning Ordinance, Section 14-132, quoted and re-checked
Written September 27, 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.