Fillmore County, Minnesota requires a county land-use permit before covered construction, although general structural building-code review and inspections remain unconfirmed1. The county administers zoning and septic, while a township with its own zoning ordinance may also require approval234. Permanent use of an RV as a dwelling is prohibited where the county ordinance applies5.
At a glance
- Building permit
- Required before covered construction; general structural-code enforcement remains unconfirmed1
- Zoning
- County zoning applies outside incorporated limits, with separate township approval where applicable24
- Septic
- The county administers septic; new and replacement SSTS need a permit and compliance inspection367
- Permanent RV living
- Prohibited where the Fillmore County Zoning Ordinance applies5
- Tiny home
- No direct county tiny-home occupancy rule was confirmed; ask the Land Use Department8
- Owner-builder
- A qualifying owner may be exempt from contractor licensing, but county permits still apply9
- Agricultural exception
- Only portable agricultural buildings on skids have the stated building-permit exception10
- Minimum lot size
- District-specific: 2.5 buildable acres in Agricultural and 10,000 square feet for an R-1 single-family lot1112
Who to call
Building permits
Fillmore County Land Use Department
County land-use permits, planning and zoning, floodplain and shoreland rules, septic systems and feedlots
Courthouse, 101 Fillmore Street PO Box 466 Preston, MN 55965
Planning & zoning
Fillmore County Land Use Department
Published application, permit-duration, setback and septic guidance
101 Fillmore Street Preston, MN 55965
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 Fillmore County, Minnesota?
Fillmore County requires a zoning or land-use permit before erecting, installing, altering, converting, moving or demolishing covered structures13. The county permit is not proof of general structural plan review, building inspections or a certificate of occupancy; ask the Land Use Department who administers those requirements for the project8. The stated agricultural exception is narrow: a portable agricultural building must be placed on skids, while other agricultural work may still face land-use rules1014. A fee is due with the application under the schedule posted in the Zoning Administrator’s office15.
Who issues Fillmore County building and land-use permits?
Start with the Fillmore County Land Use Department at the courthouse in Preston; the office is open weekdays and can be reached at 507-765-33258. The department handles county land-use permitting and oversees planning, zoning, floodplain, shoreland, septic and feedlot matters8. Applications may be mailed, and the county does not accept credit or debit cards16. A complete ordinary application typically takes 1–2 days, while a conditional-use permit or variance generally requires notice and a public hearing within a 60-day process17. Significant construction must begin within one year, and the structure must be ready for its permitted purpose within two years1.
Does Fillmore County have zoning?
Fillmore County zoning covers land, structures and waters outside incorporated municipal limits, and it can apply inside a municipality that adopts the county ordinance2. A township with its own zoning ordinance must supply a permit, resolution or other approval before the county application is complete4. Lot rules depend on the district: an Agricultural dwelling needs 2.5 buildable acres; an R-1 single-family lot needs 10,000 square feet and an R-1 two-family lot needs 15,000 square feet1112. Shoreland uses follow the underlying district’s lot area plus shoreland standards18. Agricultural setbacks include 73 feet from the road center and 10 feet from a property line; R-1 setbacks and residential height limits differ1920.
How do septic permits work in Fillmore County?
Fillmore County administers septic systems and related land-use controls3. New and replacement subsurface sewage treatment systems require an approved construction permit before work begins and an independent compliance inspection by an authorized employee or licensed inspection business67. In the Shoreland Overlay District, a sewage-system inspection certificate is also required before a building-permit, variance or rezoning application and before recording a transfer of developed property; a nonconforming system must be corrected within 90 days21. Only 9.9% of county soils lack severe limitations for a conventional drain field, and the county says better soil improves the chance of a traditional in-ground system2216.
Can you live in an RV or tiny home in Fillmore County?
A trailer or recreational camping vehicle cannot serve as a permanent dwelling where the Fillmore County Zoning Ordinance applies5. County campground rules do not answer whether occasional camping is allowed on an individual private parcel: regulated campgrounds need a conditional-use permit, must close during December, January and February, and cannot discharge RV wastewater onto the ground23. We could not confirm a specific tiny-home category, so ask the Land Use Department how the unit’s foundation, width, utilities and zoning district affect approval8. A manufactured-home park is limited to R-1, needs a conditional-use permit and has specific lot, setback, coverage and construction standards2425.
Building a home in Fillmore County: the steps in order
- Ask the Land Use Department to identify the district, overlays and any separate township approval264.
- Check the district’s lot area, setbacks, coverage and height standards before drawing the site plan12192720.
What should you check before buying land in Fillmore County?
Confirm jurisdiction first because township zoning can add an approval before the county application is complete4. Check the district and every overlay rather than relying on acreage alone; shoreland lot area follows the underlying district, with added shoreland standards2618. Ask whether a proposed split triggers subdivision review, because subdivisions are conditional uses in R-1 and other standards may apply32. Verify driveway location early because county-road access review considers sight distance and road speed30. Budget cautiously for septic because only 9.9% of county soils lack severe conventional-drain-field limitations22. The effective property-tax rate is about 0.9%, and the median annual bill is about $1,9323334.
Watch-outs
- A township with its own zoning ordinance may require separate approval before the county application is complete4.
- Permanent RV dwelling use is prohibited where county zoning applies; campground rules do not establish a right to camp on an individual private parcel523.
- Fillmore County structural building-code inspections and certificate-of-occupancy requirements remain unconfirmed; ask the Land Use Department who has jurisdiction before construction8.
- Floodplain development must meet the county overlay standards and may require a qualified engineer or hydrologist’s evaluation35.
Sources
- Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Land Use, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- Minnesota Rules 7082.0500: Permit Program for SSTS, quoted and re-checked
- Minnesota Rules 7082.0700: Inspection Program for SSTS, quoted and re-checked
- Fillmore County Land Use Department (co.fillmore.mn.us)
- Sec. 326B.805 MN Statutes (Minnesota statewide rule), quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Land Use Department (co.fillmore.mn.us)
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- Zoning FAQs, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore 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
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- 2024 Fillmore County Zoning Ordinance, quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Fillmore County Land Use, 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.