Off-Grid Living in Hennepin County, Minnesota

I'll be upfront about the biggest quirk of researching Hennepin County: there's almost no unincorporated land left here. The county is carved up into 45 cities, so for zoning, dwelling standards, and building permits, you're really dealing with whatever city (or in a few edge cases, township) your parcel sits in, not the county itself. That's a structural fact worth internalizing before you get too deep into planning.

Zoning and raw land. Minnesota state law (Minn. Stat. §462.357) hands land-use authority to municipalities, and Hennepin County doesn't zone in any meaningful sense because it has so little unincorporated territory. So whether you can camp on raw land, live in something unconventional, or build below typical size minimums depends entirely on the city where the parcel is. I'd call that city's planning or zoning office before assuming anything.

Tiny homes, RVs, and dwelling standards. I couldn't find a county-level answer here, and I don't think one exists, this is a city-by-city call layered on top of the state building code baseline. Ask the local building department directly.

Building permits. The Minnesota State Building Code is mandatory across the seven-county metro, Hennepin included, but the city where your land sits issues the actual permits and does inspections. The county isn't in that loop.

Septic and composting toilets. This is where Hennepin County actually has teeth. Its Subsurface Sewage Treatment System (SSTS) ordinance, Ordinance 19, governs septic systems in unsewered areas countywide, including inside city limits in many cases, and it layers on standards beyond the state minimum, like a setback of at least fifty feet from certain wetland types, tighter than what state or federal rules alone would require. Hennepin County Environmental Health handles permitting and inspection here.

Greywater. No dedicated county greywater ordinance that I could find. It likely falls under the same SSTS rules that bar wastewater, greywater included, from reaching the ground surface or surface water without an MPCA permit, but that's my inference rather than an explicit county rule. Worth confirming directly with Environmental Health.

Rainwater harvesting. No county-specific restriction found. This looks like it defaults to the state baseline: rain barrels unregulated, plumbed indoor systems reviewed under state plumbing code.

Wells. Minnesota Department of Health licenses well contractors and requires most wells to be installed by a licensed contractor, with an exception for personal wells on your own farm or abode land. Hennepin County isn't among the counties delegated to run its own well-construction permitting program, so MDH is your primary contact, though the county does participate in well-sealing and disclosure-adjacent programs.

Utility disconnection. I found nothing at the county level requiring or forbidding grid disconnection. That's a city/township building-code question, and Hennepin's regulatory reach here really stops at septic compliance.

Bottom line: treat Hennepin County government as your septic and well-adjacent authority, and your city hall as your zoning, dwelling, and building-permit authority. Confirm everything locally before you buy land or build.