Building permits, zoning and septic rules in Kandiyohi County, Minnesota

At a glance

Building permit

Required to erect, alter or move a structure; limited exceptions may apply¹

Zoning

Present, but the applicable district and local authority must be checked parcel by parcel²

Setbacks

Depend on the zoning district and the adjoining road, lake or water body⁵

Septic permit

Required for design, installation, construction, alteration, extension or repair⁶

RV or tiny-home living

Not confirmed; ask Planning and Zoning about the specific parcel and proposed use⁷

Owner-builder

Homeowners may perform work on their own property, but applicable code and permits still apply⁸

Water-supply well

Notify the Minnesota Department of Health and submit the applicable fee before drilling⁹

Who to call

Contact details are copied from each office’s official page and were checked against it on September 29, 2026.

Do you need a building permit in Kandiyohi County, Minnesota?

Yes. Kandiyohi County requires a permit to erect, alter or move a structure, while listed maintenance work such as re-shingling and re-siding is exempt¹¹⁰. Minnesota's State Building Code is the minimum construction standard throughout the county, but municipal enforcement can depend on local ordinance adoption¹¹. The State Building Code generally does not apply to agricultural buildings, subject to limited statutory exceptions, so confirm both the structure's qualification and the local land-use rules before relying on that exclusion¹². Building-permit fees depend on county-adopted cost tables and project cost, while land-use fees come from a County Board fee schedule¹³.

Who issues Kandiyohi County building permits, and how do you reach them?

Kandiyohi County Planning and Zoning answers land-use, district and setback questions at 400 Benson Ave SW, Willmar, MN 56201, by phone at (320) 231-6229 or by email at [email protected]¹⁴. The Kandiyohi County Building Department uses the same address, main phone and email for building-permit applications and plan submissions¹⁵. Building permits require an application, site plan and building plans, and additional material may be required for the project's location or scope¹⁶. Complete land-use applications are generally issued within 5 business days, although timing varies by season and completeness¹⁶. The county publishes an inspection-scheduling procedure rather than one universal inspection schedule; schedule inspections at least 24 hours ahead through option #2 on the department phone line¹⁷¹⁵.

Does Kandiyohi County have zoning?

Yes, but zoning administration is parcel-specific in Kandiyohi County: the applicable district and local authority must be checked rather than assuming the county administers every township or city rule². The county GIS and township zoning maps identify districts for individual parcels¹⁸. Published categories include agricultural, commercial-industrial, shoreland residential, community residence, rural residential and resource-management districts, plus an incorporated-cities category¹⁹. That incorporated-cities category does not establish county administration inside a city, so confirm a city parcel with the city¹⁹. Setbacks vary by zoning district and by the type of road, lake or water body adjoining the property⁵. We could not confirm numeric rules for minimum dwelling size, minimum lot size, lot coverage or building height; ask Planning and Zoning and the applicable local authority before relying on a concept plan²¹⁴.

How do septic permits work in Kandiyohi County?

Kandiyohi County Environmental Services regulates the design, permitting, installation and inspection of subsurface sewage treatment systems under the county sewage ordinance and Minnesota rules³. A county permit is required to design, install, construct, alter, extend or repair an SSTS⁶. Properties served by Glacial Lakes Sanitary Sewer or Eagle Lake Sewer should contact the respective sewer district about proposed projects instead⁴. Kandiyohi County requires a compliance inspection in a Shoreland Management Zone when a land-use permit, building permit or variance is requested for an improvement or use; elsewhere, a bedroom addition or property sale or transfer triggers inspection²⁰. Only 4.6% of county soils lack severe limitations for a conventional drain field, so establish septic feasibility early²¹. The SSTS Office is at 400 Benson Ave SW, Willmar, MN 56201 and can be reached at (320) 231-6229 ext. 5251²².

Can you live in an RV or tiny home on land in Kandiyohi County?

We could not confirm a Kandiyohi County rule that authorizes or prohibits living in an RV on a private parcel, and the available campground law does not answer that single-parcel question²³. We also could not confirm a county minimum dwelling size or a specific tiny-home occupancy rule, while the county's zoning requirements vary by parcel and jurisdiction⁷. Ask Planning and Zoning whether the proposed unit is an allowed principal or accessory use in the parcel's district, what setbacks apply, and whether temporary occupancy during construction is allowed⁵¹⁴. A new manufactured home installed for occupancy in Minnesota must receive the required federal-standards inspection, but that state rule does not decide where local zoning allows the home²⁴. Off-grid sanitation is also unresolved locally; Kandiyohi County's verified rule requires permits for SSTS work, so discuss any alternative sanitation proposal with the SSTS Office before purchase⁶²².

Building a home in Kandiyohi County: what are the steps?

1. Use the county GIS or township map to identify the zoning district, then confirm the administering authority, allowed use and setbacks²⁵.

1. Establish septic feasibility with the SSTS Office, or contact the applicable public sewer district if the parcel is served by one⁶⁴.

1. Before drilling a water-supply well, submit the required notification and fee to the Minnesota Department of Health⁹.

1. Obtain access approval from MnDOT for a state highway, County Public Works for a county road, or the township clerk for a township road²⁵.

1. Have Planning and Zoning review wetlands, shoreland and floodplain constraints, then obtain any required floodplain permit²⁶²⁷.

1. Submit the building application, site plan and building plans, start construction within 1 year of land-use permit issuance, and schedule inspections at least 24 hours ahead¹⁶¹⁷.

What should you check before buying land in Kandiyohi County?

Start with the zoning district, administering authority, allowed use and setbacks, because Kandiyohi County's mapped zoning does not mean the county administers every local ordinance²⁵. Ask for the septic compliance record before closing because a sale or transfer can trigger a county compliance inspection²⁰. Conventional drain-field conditions are severely limited across most county soils, with only 4.6% rated without severe limitations²¹. Determine whether the parcel uses an SSTS or a public sewer district, and plan a well notification if private water is needed⁴⁹. Confirm driveway approval before treating frontage as usable access²⁵. If land is being split, a registered surveyor's certificate is required for a subdivision smaller than a full government lot or full quarter-quarter section²⁸. Have Planning and Zoning review wetland, shoreland and floodplain constraints before treating the lot as buildable²⁶.

Watch-outs

• A property sale or transfer can trigger a Kandiyohi County septic compliance inspection even when no new house is planned²⁰.
• A homeowner may perform work on the homeowner's own property, but applicable building-code requirements and permits still apply⁸.
• Kandiyohi County access approval comes from MnDOT, County Public Works or the township clerk depending on who controls the road²⁵.
• We could not confirm local RV occupancy, tiny-home occupancy or minimum dwelling-size rules; ask Kandiyohi County Planning and Zoning about the parcel and proposed use⁷¹⁴.

Sources

1. Planning & Zoning, quoted and re-checked
2. Planning & Zoning, quoted and re-checked
3. Subsurface Sewage Treatment Systems (SSTS), quoted and re-checked
4. Subsurface Sewage Treatment Systems (SSTS), quoted and re-checked
5. Planning & Zoning, quoted and re-checked
6. Subsurface Sewage Treatment Systems (SSTS), quoted and re-checked
7. Planning & Zoning (2026 county census)
8. Minnesota State Building Code Adoption Guide, quoted and re-checked
9. Constructing a New Water-Supply Well in Minnesota, quoted and re-checked
10. Planning & Zoning, quoted and re-checked
11. Overview of the Minnesota State Building Code, quoted and re-checked
12. Overview of the Minnesota State Building Code, quoted and re-checked
13. Planning & Zoning, quoted and re-checked
14. Kandiyohi County Planning and Zoning Department (kcmn.us)
15. Kandiyohi County Building Department (kcmn.us)
16. Planning & Zoning, quoted and re-checked
17. Building Permits/ Information, quoted and re-checked
18. Planning & Zoning, quoted and re-checked
19. Layer: County Zoning (ID: 6), quoted and re-checked
20. Subsurface Sewage Treatment Systems (SSTS), quoted and re-checked
21. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
22. Kandiyohi County SSTS Office (kcmn.us)
23. 2025 Minnesota Statutes, Chapter 327 (Minnesota statewide rule), quoted and re-checked
24. Manufactured home information (Minnesota statewide rule), quoted and re-checked
25. Planning & Zoning, quoted and re-checked
26. Planning & Zoning, quoted and re-checked
27. Floodplain Regulations (Minnesota statewide rule), quoted and re-checked
28. Planning & Zoning, quoted and re-checked

Written September 29, 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.