Off-grid site report

Tooele County, UT

40.5308, -112.2983 · 5,063 ft elevation

Read this before you act on anything below. This is my researched starting point for Tooele County, UT, 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 rulesTooele County, UT

Zoning & raw-land occupancy

RestrictedTooele County's Land Use Ordinance regulates dwellings by zone through use tables, and raw or ag-partitioned land often isn't a buildable residential lot until it goes through subdivision approval under the county's Development Department. source

Dwellings, tiny homes & RVs

RestrictedThe county allows a mobile home or RV as a temporary residence while building a permanent home or in emergencies, but only via a zoning administrator permit and only for a limited time; permanent manufactured homes must meet Chapter 10 placement and code rules. source

Building permits & codes

RestrictedTooele County's Development Department enforces the state construction code locally; permits are required for construction and utility connections, and site plans are checked against well/septic setbacks. source

Septic & composting toilets

RestrictedSeptic systems require permitting and inspection by the Tooele County Health Department under Health Regulation #12, including a certified designer's plan; composting toilet rules specific to the county were not confirmed, so ask TCHD Environmental Health directly. source

Greywater reuse

Unclear - verifyNo Tooele County-specific greywater ordinance was found; the state rule (Utah Admin. Code R317-401) likely applies but local implementation is not confirmed, so check with TCHD Environmental Health.

Rainwater harvesting

Unclear - verifyNo county-specific rainwater harvesting rule was found; the state framework (Utah Code 73-3-1.5) is presumed to apply until a county rule is confirmed.

Private wells & water rights

RestrictedWells require a permit and inspection from the Tooele County Health Department under Health Regulation #5, in addition to the state water right (Start Card) from the Utah Division of Water Rights. source

Living disconnected from utilities

Unclear - verifyNo explicit county ban on disconnecting from utilities was found, but permitting requirements (certificate of occupancy, capped RV occupancy, required utility sign-off before connection) mean off-grid systems still go through county inspection and approval.

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 5.3 hrs/day
Worst month (sizes an off-grid array): 3.1 hrs/day
Yearly output per 1 kW of panels: 1,508 kWh

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Weather1991-2020

Precipitation: 20 in/yr
Snowfall: 83 in/yr
Heating degree days: 5,464 (moderate)
Frost-free season: Apr 27 to Oct 23

How far help isstraight-line

Hospital Riverton Hospital: 16.7 mi
Fire station South Jordan Fire Station 64: 14.6 mi
Hardware store CAL Ranch Store: 1.1 mi
Grocery Lucky: 1.0 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 84074).

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.