Off-grid site report

Fall River County, SD

43.4204, -103.4796 · 3,455 ft elevation

Read this before you act on anything below. This is my researched starting point for Fall River 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 rulesFall River County, SD

Zoning & raw-land occupancy

Unclear - verifyFall River County has no planning and zoning department or ordinance for unincorporated land; the county instead publishes informal 'Code of the West' guidance. Land inside Hot Springs or Edgemont follows that city's own zoning rules. source

Dwellings, tiny homes & RVs

Unclear - verifyNo county ordinance addressing tiny homes or RVs as dwellings was found. Manufactured/mobile homes must be registered and titled with the State of South Dakota in the buyer's name; cities may impose their own rules, not confirmed at county level. source

Building permits & codes

Varies locallyThe county says a building permit is only required if a structure is in the flood plain; property changes must still be reported to the Director of Equalization, and larger commercial/ag structures trigger a valuation call to that office. Hot Springs and Edgemont run their own separate building permit systems inside city limits. source

Septic & composting toilets

Generally allowedSeptic systems must comply with South Dakota DANR regulation, including a state minimum lot size under SDCL 74:53:01:16; no separate county septic ordinance was found. source

Greywater reuse

Unclear - verifyNo Fall River County page addresses greywater reuse; this isn't confirmed one way or the other, so ask DANR or the county directly.

Rainwater harvesting

Unclear - verifyNo formal county rule on rainwater harvesting was found, though the county's own materials suggest cistern use is common given limited water access in rural areas. source

Private wells & water rights

Generally allowedWells are regulated by the State DANR Water Rights Program; the county warns that water access is inconsistent across the county and should be confirmed before purchase. source

Living disconnected from utilities

Varies locallyNo county ordinance bars off-grid or utility-disconnected living, consistent with the lack of zoning/building code on most unincorporated land; electrical and plumbing work still falls under state licensing rules. 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: 1,555 kWh

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Weather1991-2020

Precipitation: 18 in/yr
Snowfall: 28 in/yr
Heating degree days: 6,523 (cold)
Frost-free season: May 14 to Sep 26

How far help isstraight-line

Hospital Monument Health Custer Hospital: 24.9 mi
Fire station Hot Springs Volunteer Fire Department: 0.8 mi
Hardware store Hot Springs Ace Hardware: 0.7 mi
Grocery Lynn's Dakotamart: 0.7 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 57747).

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.