Off-grid site report

Pennington County, SD

44.1033, -103.1783 · 3,160 ft elevation

Read this before you act on anything below. This is my researched starting point for Pennington County, SD, 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 rulesPennington County, SD

Zoning & raw-land occupancy

Varies locallyPennington County has adopted a countywide Zoning Ordinance and 2020 Comprehensive Plan under state authority (SDCL 11-2); zoning district and setbacks control raw-land occupancy, and the Board of Adjustment can grant variances. source

Dwellings, tiny homes & RVs

Varies locallyThe county ordinance lists Accessory Dwelling Units, Efficiency Dwellings, Temporary Living Quarters, Caretaker's Residences, and RV Parks as regulated conditional uses; whether a tiny house on wheels can be a standalone permanent residence outside an RV park is not confirmed, so ask the Planning Department.

Building permits & codes

RestrictedPennington County requires a Building Permit for construction and has adopted International codes, with electrical/gas/fire code administration handled by the State of South Dakota even though the county issues the permit. source

Septic & composting toilets

RestrictedThe county incorporates South Dakota's statewide OSWTS minimum standards (ARSD 74:53:01) but adds its own Operating License system with periodic re-inspection and a license check before property sale; holding tanks are permitted only as a last resort. Composting toilets are not separately addressed, so confirm with Planning. source

Greywater reuse

Unclear - verifyNo official Pennington County or state page specifically addresses residential greywater reuse; ask the Planning Department directly since wastewater systems fall under their purview.

Rainwater harvesting

Unclear - verifyNo Pennington County ordinance addressing rainwater harvesting was found; this inherits the state's unaddressed status.

Private wells & water rights

Unclear - verifyNo Pennington County-specific well ordinance was located; wells appear to fall under the statewide DANR Water Rights Program with no confirmed county addition.

Living disconnected from utilities

Varies locallyThere's no blanket county ban on living disconnected from utilities, but any built structure still needs a Building Permit and code compliance, and any wastewater system still needs the county's OSWTS operating license. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 5.2 hrs/day
Worst month (sizes an off-grid array): 3.5 hrs/day
Yearly output per 1 kW of panels: 1,496 kWh

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Weather1991-2020

Precipitation: 18 in/yr
Snowfall: 26 in/yr
Heating degree days: 7,324 (cold)
Frost-free season: May 11 to Sep 29

How far help isstraight-line

Hospital Monument Health Rapid City Hospital: 4.0 mi
Fire station Rapid City Fire Department - Fire Station 7: 0.3 mi
Hardware store Menards: 1.0 mi
Grocery Walmart Supercenter: 1.1 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 57701).

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.