Off-grid site report

Fremont County, WY

43.0106, -108.9410 · 5,929 ft elevation

Read this before you act on anything below. This is my researched starting point for Fremont County, WY, 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 rulesFremont County, WY

Zoning & raw-land occupancy

Generally allowedFremont County has no countywide zoning ordinance, except floodplain zoning near Lander, Riverton, Dubois, and Hudson, and separate zoning on the Wind River Reservation. Incorporated towns have their own zoning that overrides this permissiveness within town limits. source

Dwellings, tiny homes & RVs

Varies locallyNo general county rule against tiny homes or single RVs on private land was found, but RV/mobile home parks require a site plan for electrical and fire safety. Individual towns may have their own restrictions, not confirmed here. source

Building permits & codes

Generally allowedFremont County has no county building code and does not issue Certificates of Occupancy; it recommends but does not require following state-adopted construction codes. Commercial/public buildings may trigger a State Fire Marshal review under state law. source

Septic & composting toilets

RestrictedFremont County Planning, under authority delegated by Wyoming DEQ, requires a Small Wastewater Permit for any new septic installation, replacement, or repair for systems under 2,000 gallons/day; larger systems go to state DEQ. source

Greywater reuse

Unclear - verifyNo Fremont County-specific greywater page was found; this is not confirmed at the county level. Ask the county's Small Wastewater Specialist whether state DEQ provisions apply as-is.

Rainwater harvesting

Generally allowedNo county ordinance on rainwater harvesting was found; this inherits Wyoming's state baseline, which has no statute prohibiting residential rainwater collection.

Private wells & water rights

RestrictedFremont County has no independent well permitting authority; any well for personal or commercial use must be permitted through the Wyoming State Engineer's Office at the state level. source

Living disconnected from utilities

Generally allowedNo countywide code requires connecting to utilities, consistent with the county's no-code approach. Alternative energy installations like solar or wind are flagged as having some review requirement, so confirm details directly with Planning. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 5.5 hrs/day
Worst month (sizes an off-grid array): 3.8 hrs/day
Yearly output per 1 kW of panels: 1,599 kWh

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Weather1991-2020

Precipitation: 11 in/yr
Heating degree days: 8,449 (severe)

How far help isstraight-line

Hospital SageWest Health Care – Lander: 17.0 mi
Fire station Fort Washakie Fire Station: 3.0 mi
Hardware store Ace Hardware: 16.1 mi
Grocery Hines General Store: 3.7 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 82514).

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 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.