Olmsted County, Minnesota administers the Minnesota Building Code and building permits in Byron, Chatfield, Eyota and Stewartville and in Eyota, Marion and Quincy townships1. Other townships administer their own land-use controls, so the correct zoning and permit office depends on the parcel2. County septic permits cover unincorporated Eyota, Marion, Oronoco and Quincy townships3.
At a glance
- Building permit
- County-administered in Byron, Chatfield, Eyota and Stewartville and in Eyota, Marion and Quincy townships1
- Zoning
- Varies by location; other townships administer their own land-use controls2
- Septic permit
- County SSTS permit required in unincorporated Eyota, Marion, Oronoco and Quincy townships; elsewhere ask the local jurisdiction3
- Well permit
- County-administered countywide for any property not on municipal water4
- Owner-builder exemption
- Yes, a statewide contractor-licensing exemption; the building permit itself is still required5
- County-highway access
- An approved access permit is required6
- Property tax
- About 1.1% effective rate; median bill around $3,314/year78
- Distance to a city of 100,000+
- About 5 miles, to Rochester, the county's own city9
Who to call
Building permits
Olmsted County Planning Department - Inspections Division
Building permits, inspections and zoning review for the cities of Byron, Chatfield, Eyota and Stewartville and the townships of Eyota, Marion and Quincy
2122 Campus Drive SE Suite 100 Rochester, MN 55904
Septic permits
Olmsted County Planning Department - Septic (SSTS) Program
Subsurface sewage treatment system (SSTS/septic) permits for unincorporated Eyota, Marion, Oronoco and Quincy townships
Well permits
Olmsted County Planning Department - Well Program
Water well construction, sealing and maintenance permits for any Olmsted County property not on a municipal water supply
Roads & driveways
Access (driveway) permits for County Highways, plus overweight/over-width move and utility/right-of-way permits
1188 50th St SE Rochester MN 55904
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 Olmsted County, Minnesota?
A building permit is required for new construction, additions and alterations in the jurisdictions served by Olmsted County Inspections10. The county administers the Minnesota Building Code for Byron, Chatfield, Eyota and Stewartville and for Eyota, Marion and Quincy townships; that county service does not cover Rochester, the remaining townships or every small city1. County-administered projects receive field inspections, and the division enforces work performed without required permits11. Minnesota's State Building Code is the statewide standard for covered construction, reconstruction, alteration and repair, but local administration still matters12. A qualifying agricultural building used strictly for agricultural purposes does not need a building permit in the county's jurisdiction, but it does need an agricultural use permit; camper storage, family or commercial vehicle storage, workshops and other nonagricultural uses do not qualify13.
Who issues building permits in Olmsted County, and how do you reach them?
For a county-administered parcel, contact the Olmsted County Planning Department's Inspections Division at (507) 328-7100 or [email protected]; the office is at 2122 Campus Drive SE Suite 100 Rochester, MN 5590414. The division administers the Minnesota Building Code in Byron, Chatfield, Eyota and Stewartville and in Eyota, Marion and Quincy townships1. The division also performs field inspections for each county-administered building project11. For other townships, start with the township zoning administrator or the Township Cooperative Planning Association because those townships have adopted and administer their own land-use controls2. Permit fees are set locally and may use fixed charges, construction value or both, so ask the issuing office for the current fee before filing15.
Does Olmsted County have zoning?
Zoning in Olmsted County varies by location rather than operating as one uniform countywide system2. Townships outside the county-administered group have adopted and administer their own land-use controls, with permits potentially issued by a township zoning administrator or the Township Cooperative Planning Association2. Minimum lot size is therefore not one countywide number. In the applicable floodplain and shoreland tables, an unsewered lot must contain at least 2 acres, and Planning may require more land to satisfy well and septic requirements16. Subdivision and platting are also regulated under county ordinances, while township or municipal controls may add another layer17. Confirm the parcel's zoning authority before relying on a setback, dwelling-size, tiny-home or accessory-use assumption; we could not confirm one countywide rule for those questions.
How do septic and well permits work in Olmsted County?
Olmsted County issues septic permits in unincorporated Eyota, Marion, Oronoco and Quincy townships318. Elsewhere, the applicable city or township generally handles the permit because Minnesota counties, cities and townships review designs and issue construction permits for most septic systems19. A habitable building in the area governed by the county septic ordinance may not be occupied or used without a compliant wastewater treatment system; a surface-discharge system requires an MPCA permit20. Only about 7.7% of county soils are rated without severe limits for a conventional drain field, so arrange the soil and site evaluation before finalizing a house site21. The county well program covers properties throughout Olmsted County that are not on municipal water4. Minnesota permits limited toilet-waste treatment devices for primitive dwellings in low-density areas, but local ordinances control owner disposal and state safeguards still apply22.
Can you live in an RV or tiny home on your land in Olmsted County?
We could not confirm a single Olmsted County rule allowing RV or tiny-home occupancy on private land. The answer depends on the city, township or county authority that administers zoning for the parcel2. Minnesota's recreational-camping-area license applies to sites accommodating 5 or more tents or recreational vehicles, but that rule does not answer whether one RV may be occupied on a private parcel23. A habitable building governed by the county septic ordinance cannot be occupied without compliant wastewater treatment, so an off-grid sanitation plan cannot bypass the local septic rules20. Before buying, ask the parcel's zoning administrator specifically about duration, seasonal use, construction-period occupancy, dwelling classification and required utilities. For a county-administered parcel, the Olmsted County Planning Department can be reached at (507) 328-7100 or [email protected]14.
Building a home in Olmsted County: what are the steps, in order?
- Identify the parcel's zoning and permit authority; other townships administer their own land-use controls2.
- For Byron, Chatfield, Eyota or Stewartville, or Eyota, Marion or Quincy township, contact County Planning for the building permit and code review114.
- Confirm zoning, setbacks and lot standards before design; an unsewered lot in the applicable floodplain or shoreland area needs at least 2 acres and may need more for well and septic16.
- Arrange septic review early; the county handles unincorporated Eyota, Marion, Oronoco and Quincy townships18.
- Contact the county well program if the property is not served by municipal water4.
- Obtain an access permit before creating or changing access to a county highway or County State-Aid Highway6.
- Apply for the applicable permit before any development in floodplain or shoreland anywhere in Olmsted County24.
- Schedule each required field inspection and do not treat permit issuance as final approval11.
What should you check before you buy land in Olmsted County, Minnesota?
Confirm the parcel's jurisdiction first because Olmsted County townships do not all use the same zoning administrator2. Check whether a proposed split or boundary change triggers county subdivision or platting review and any additional municipal controls17. Verify county-road access before relying on an existing field entrance or planning a new driveway6. Ask for floodplain and shoreland status because development anywhere in those areas requires the applicable permit24. Septic suitability deserves early attention: only about 7.7% of county soils are rated without severe limits for a conventional drain field21. About 91.4% of the county is at a slope of 15% or less, but parcel-level grades still determine the practical house, driveway and septic layout25. Budget around an effective property-tax rate of about 1.1% and a median annual bill of about $3,31478.
Watch-outs
- Other Olmsted County townships administer their own land-use controls, so identify the parcel's zoning authority before relying on county permit guidance2.
- An agricultural building exemption requires strictly agricultural use and an agricultural use permit; storage or workshop uses outside that definition do not qualify13.
- Only about 7.7% of Olmsted County's soils are rated free of severe limits for a conventional septic drain field, so budget time and money for a site evaluation and a likely engineered or mound system21.
- Development within floodplain or shoreland anywhere in Olmsted County requires the applicable development permit24.
Sources
- Building, Well, & Septic Inspections, quoted and re-checked
- Olmsted County plans and ordinances, quoted and re-checked
- Olmsted County - Building, Well & Septic (2026 county census)
- Olmsted County Planning Department - Well Program (olmstedcounty.gov)
- Sec. 326B.805 MN Statutes (2026 county census)
- Olmsted County Access Management Ordinance, quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Olmsted County - Building, Well & Septic Permit Applications & Fees (2026 county census)
- Building, Well, & Septic Inspections, quoted and re-checked
- 2025 Minnesota Statutes, section 326B.121 (Minnesota statewide rule), quoted and re-checked
- Building, well, & septic permit applications & fees, quoted and re-checked
- Olmsted County Planning Department - Inspections Division (olmstedcounty.gov)
- Minnesota State Building Code Adoption Guide (Minnesota statewide rule), quoted and re-checked
- Floodplain-Shoreland Ordinance, quoted and re-checked
- Ordinances & Codes, quoted and re-checked
- Olmsted County Planning Department - Septic (SSTS) Program (olmstedcounty.gov)
- SSTS design (Minnesota statewide rule), quoted and re-checked
- OC Code of Ordinances Chapter 3400: Subsurface Sewage Treatment Systems Ordinance, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Minnesota Administrative Rules, part 7080.2450 Maintenance (Minnesota statewide rule), quoted and re-checked
- 2025 Minnesota Statutes, Chapter 327 (Minnesota statewide rule), quoted and re-checked
- Development applications and fees, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
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.