Off-grid site report

Natrona County, WY

43.0296, -106.8095 · 5,607 ft elevation

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

Zoning & raw-land occupancy

RestrictedNatrona County has adopted a formal countywide Zoning Resolution administered by the Planning Department, applying to all unincorporated land; this is stricter than the 'no zoning' reputation some rural Wyoming counties have. source

Dwellings, tiny homes & RVs

RestrictedTiny homes on wheels are classified as trailers/manufactured homes; foundation-built tiny homes fall under efficiency-dwelling-unit rules with size minimums that aren't confirmed in the county's own text. RVs generally must go in designated manufactured-home-park zones; confirm specifics with Planning. source

Building permits & codes

RestrictedNatrona County has adopted ICC building codes and requires permits for most residential and commercial construction, including additions, decks, and utility systems; sheds need a zoning certificate, but fences under 7 feet don't need a building permit. source

Septic & composting toilets

RestrictedThe Casper-Natrona County Health Department, under delegation from Wyoming DEQ, permits and licenses all small wastewater system installation, repair, and use countywide, capped at a set daily gallon threshold per property. source

Greywater reuse

Unclear - verifyNo Natrona County-specific greywater ordinance was found, so this likely defers to Wyoming DEQ's general permit-by-rule framework; confirm with CNCHD or DEQ directly if you're planning a greywater system.

Rainwater harvesting

Generally allowedNo county ordinance addresses rainwater harvesting, and the state has no statute prohibiting it, so this follows Wyoming's generally permissive state baseline.

Private wells & water rights

RestrictedWell permitting is entirely a state matter through the Wyoming State Engineer's Office; the county has no independent well-permitting authority, though CNCHD's septic siting review can affect well placement on a lot.

Living disconnected from utilities

Varies locallyNo countywide ordinance requires connection to electric, gas, or municipal water/sewer, but any structure still needs zoning/building review, and going off the sewer grid triggers the septic permit requirement instead. 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): 3.8 hrs/day
Yearly output per 1 kW of panels: 1,570 kWh

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Weather1991-2020

Precipitation: 10 in/yr
Snowfall: 42 in/yr
Heating degree days: 8,001 (severe)

How far help isstraight-line

Hospital Banner Wyoming Medical Center: 28.2 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 82646).

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.