Off-Grid Living in Fillmore County, Minnesota

I've been digging through Fillmore County, Minnesota's official pages for anyone thinking about going off-grid there, and the short version is: this is a real zoning county, not one of those "no rules" spots people hope for in the driftless region. Here's what I found, and where I hit dead ends.

Zoning first. Fillmore County has a countywide Zoning Ordinance (most recently updated in 2024) run by the county's Land Use / Planning & Zoning Department. What you can do with raw land depends on the zoning district your parcel sits in, so this isn't uniform across the county. The county's Subdivision Ordinance also says that on a subdivided lot, the primary dwelling has to be the first structure built there, and minimum lot size in that ordinance is 2.5 acres. If you're eyeing a specific parcel, I'd call Zoning before buying.

Tiny homes and RVs. I see claims floating around online about a specific square-footage and ceiling-height standard for tiny houses in Fillmore County, but I could not confirm that on any official county or Minnesota DLI page, so I'm treating it as unconfirmed. What is solid: Minnesota's state building code has adopted Appendix Q-style tiny house provisions, and site-built tiny houses fall under the Minnesota Residential Code. Manufactured homes need a building permit and have to meet state siting/anchoring rules. Whether the county allows an RV as a permanent residence is a question only Fillmore County Zoning can answer.

Building permits. The Land Use Department administers permitting, and its own septic paperwork ties construction to Minnesota Rules 7080-7083. I could not confirm from the county's own text whether the full State Building Code has been formally adopted countywide, so ask the Zoning office directly.

Septic is the most clearly documented area. Fillmore County runs its own SSTS ordinance under the Land Use Department, inspections follow Minnesota Rules Chapter 7082.0700, and only licensed inspectors can sign off. Permits are valid one year, renewable if the design hasn't changed. Notably, the county now requires an SSTS inspection at property sale, with noncompliant systems needing correction within a set window after transfer, and escrow may apply. Composting toilets are allowed under state SSTS rule chapters referenced in the county's own permit forms.

Greywater and rainwater have no dedicated county ordinance I could find; greywater likely falls under the SSTS framework generally, and rainwater collection generally follows the light-touch state baseline (rain barrels largely unregulated, indoor plumbed systems reviewed under state plumbing code). Confirm specifics with the county.

Wells are governed by the state Well Code (Minn. Stat. ch. 103I, Minn. Rules ch. 4725), administered by the Minnesota Department of Health's Rochester district office, which covers Fillmore County. Property owners can drill their own well for personal farm or household use; otherwise a licensed contractor is required. Big withdrawals (over 10,000 gallons/day) need DNR review.

Utility disconnection rules aren't spelled out anywhere I found. Ask Zoning whether occupancy permits require a grid hookup.