Off-grid site report

Sublette County, WY

42.6930, -109.2684 · 9,108 ft elevation

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

Zoning & raw-land occupancy

RestrictedSublette County has adopted countywide zoning for all private unincorporated land under state enabling law (Wyo. Stat. 18-5-201 to 207); it doesn't apply to federal/state public land. Check your parcel's district before building. source

Dwellings, tiny homes & RVs

Varies locallyAllowed uses, guest houses, and height limits (30 or 35 ft) depend on the zoning district; mobile home districts are defined separately from standard residential ones. RV-as-permanent-residence rules were not confirmed. source

Building permits & codes

Varies locallySublette County has not adopted a residential building code or IBC standards and has no building department, but it does require permits for septic, road access/utility crossings, signs, mailboxes, and certain zoning-related building activities. source

Septic & composting toilets

RestrictedThe county issues septic permits for conventional systems under a set daily flow; larger or non-domestic systems must go through Wyoming DEQ's Underground Injection Control program. Composting/incinerating toilets may need a separate state DEQ permit. source

Greywater reuse

Unclear - verifyNot confirmed at the county level; no Sublette County page addresses greywater separately, so it likely falls under Wyoming DEQ's general wastewater/reuse permitting. Confirm directly with DEQ. source

Rainwater harvesting

Unclear - verifyNot confirmed at the county level, no ordinance found addressing rainwater harvesting, and no known state prohibition either.

Private wells & water rights

RestrictedWyoming's State Engineer's Office issues all well permits statewide (application required before drilling), and Sublette County additionally requires a full acre for a domestic well plus septic system siting. source

Living disconnected from utilities

Generally allowedThe county does not require connection to electric, gas, or municipal water/sewer; it's a personal choice, though those near Pinedale, Big Piney, or Marbleton can check municipal hookup options voluntarily. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 5.4 hrs/day
Worst month (sizes an off-grid array): 3.3 hrs/day
Yearly output per 1 kW of panels: 1,555 kWh

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Weather1991-2020

Precipitation: 10 in/yr
Snowfall: 42 in/yr
Heating degree days: 10,584 (severe)

How far help isstraight-line

Hospital SageWest Health Care – Lander: 28.9 mi
Fire station: none within range
Hardware store: none within range
Grocery: none within range

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 82923).

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.