Off-Grid Living in Ravalli County, Montana

Ravalli County, Montana is one of the more freedom-friendly spots in the state for off-grid living, but "freedom" here comes with a big asterisk: septic compliance, not zoning, is the real gatekeeper.

Zoning: Ravalli County has no countywide zoning ordinance. I know that sounds like a green light to do whatever you want, and outside certain neighborhoods, it largely is. The county only gets zoning authority where residents have voluntarily formed a Citizen-Initiated Zoning District (CIZD) under state law (Montana Code Annotated 76-2-101). If your parcel sits inside one of those districts, the county enforces it. If not, raw land use is essentially unregulated by zoning. The Ravalli County Planning Department is the office to call to find out if your land falls inside a CIZD, and they also run subdivision review under the state Subdivision and Platting Act if you're splitting land.

Dwellings, tiny homes, RVs: I couldn't find a Ravalli County ordinance that specifically restricts tiny homes or alternative dwellings. The state's Appendix Q tiny-home provisions apply as the default baseline. RVs are addressed in county subdivision code for RV parks and campgrounds, but the bigger issue for someone wanting to live in an RV on their own land isn't zoning, it's wastewater (see below). Be skeptical of third-party sites claiming the county "allows" tiny homes outright; I couldn't confirm that on an official county page.

Building permits: Ravalli County doesn't appear to run its own building-permit department. Building code enforcement is handled by the state's Montana Building Codes Program, and single-family homes are generally exempt from state permit jurisdiction unless the county has opted in, which I could not confirm one way or the other. Call the state program or the county Planning Department to clarify your situation.

Septic: This is the rule that actually controls off-grid habitation here. Ravalli County Environmental Health (RCEH) requires an approved septic permit before you start construction or move a structure onto a parcel, and this explicitly applies to RVs used as dwellings: an occupied RV or building needs an approved wastewater system, full stop. If your site hasn't already gotten state DEQ approval, RCEH requires a site evaluation, including a soil test hole dug by an excavator with an RCEH rep present, and it's the property owner's job to schedule and pay for that. Composting toilets aren't addressed on the county's public pages I found, so confirm directly with RCEH whether one satisfies the code alone.

Greywater, rainwater, wells: None of these have a Ravalli County-specific ordinance that I could locate. Greywater and septic questions fall back to state DEQ rules. Rainwater harvesting for personal, non-potable use doesn't appear restricted by the county or state. Wells are permitted through the state DNRC, not the county, under the statewide exempt-well framework.

Utilities: There's no direct rule forcing you to connect to the electrical grid. But since occupancy of any structure hinges on an approved wastewater system, going off-grid on power is fine; going off-grid on septic is not.

Bottom line: talk to Planning about zoning status and RCEH about septic before you do anything else.