Off-grid site report

Treasure County, MT

46.2908, -107.1018 · 2,608 ft elevation

Read this before you act on anything below. This is my researched starting point for Treasure County, MT, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.

The local rulesTreasure County, MT

Zoning & raw-land occupancy

Unclear - verifyMontana has no statewide zoning code; counties can only create zoning via a landowner petition process under Mont. Code Ann. § 76-2-101. No document confirms Treasure County has adopted countywide zoning, so raw-land occupancy rules are not confirmed at the county level. source

Dwellings, tiny homes & RVs

Varies locallyNo Treasure County ordinance on tiny homes or RVs was found, so the state baseline (Appendix Q for foundation-built tiny homes, RV treatment for wheeled ones) applies by default.

Building permits & codes

Unclear - verifyMontana exempts single-family homes from state building permit jurisdiction unless a county opts in, and it's not confirmed whether Treasure County has opted in. Confirm with the county and the Montana Building Codes Bureau. source

Septic & composting toilets

Generally allowedSeptic systems are permitted statewide under DEQ's minimum design standards (Circular DEQ-4), with local health departments or sanitarians issuing permits; Treasure County's specific administering office isn't confirmed and may be shared with a neighboring county. source

Greywater reuse

RestrictedNo county-specific rule was found, so Montana's state administrative rule applies: limited in-home reuse is allowed without a permit, but subsurface irrigation with greywater is restricted. source

Rainwater harvesting

Generally allowedNo Treasure County restriction was found on rooftop rainwater collection for personal, non-potable use, consistent with Montana's generally permissive state stance. source

Private wells & water rights

Generally allowedNo county-specific well ordinance was found; Montana's exempt-well provisions, administered by DNRC, govern private wells countywide, including small-volume wells developed without a pre-drilling permit. source

Living disconnected from utilities

Unclear - verifyNo Montana statute or Treasure County document requires grid electric or municipal water/sewer hookup for a private home, but septic and water rules for any permitted structure may create indirect requirements. Confirm with county planning and health contacts. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.8 hrs/day
Worst month (sizes an off-grid array): 2.8 hrs/day
Yearly output per 1 kW of panels: 1,376 kWh

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Weather1991-2020

Precipitation: 14 in/yr
Snowfall: 37 in/yr
Heating degree days: 7,184 (cold)
Frost-free season: May 15 to Sep 25

How far help isstraight-line

Hospital Rosebud Health Care Center: 20.7 mi
Fire station: none within range
Hardware store Hysham Hardware & Ag Supply: 6.3 mi
Grocery Picchioni's IGA: 20.4 mi

From OpenStreetMap. Road miles will be longer, often much longer in hill country.

Plan this spot

These open with this location's real numbers already filled in (ZIP 59076).

Size a solar system Heat loss & insulation Firewood per winter Rainwater harvest Garden size Panel tilt

Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 21, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.