Off-grid site report

Corson County, SD

45.6697, -101.4551 · 2,090 ft elevation

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

Zoning & raw-land occupancy

Unclear - verifySouth Dakota counties are only permitted, not required, to adopt zoning under SDCL 11-2. Corson County's official site lists no Planning & Zoning department and no zoning ordinance was found published anywhere official, so it's unclear whether one exists. Confirm with the County Commission. source

Dwellings, tiny homes & RVs

Unclear - verifyNo Corson County rule on tiny homes, RVs, or manufactured housing was found on the county's official site, and this would depend on a zoning ordinance that I could not confirm exists. Ask the County Commission/Auditor directly.

Building permits & codes

Unclear - verifySouth Dakota has no mandatory statewide building code outside local adoption, and Corson County's official site lists no building permit office. It's unclear whether the county issues building permits at all; confirm with the County Auditor or Commission. source

Septic & composting toilets

Generally allowedOn-site wastewater (septic) systems are regulated statewide by South Dakota under Administrative Rules of South Dakota Chapter 74:53:01, using certified installers. No Corson County health or environmental office administering septic permits was found, so administration at the local level is unconfirmed; ask DANR or the County Auditor who handles it locally.

Greywater reuse

Unclear - verifyNo statewide South Dakota rule and no Corson County rule on greywater reuse turned up in official sources. Not confirmed either way.

Rainwater harvesting

Unclear - verifyNo state or Corson County-specific regulation on rainwater harvesting was found. South Dakota generally treats domestic water use as exempt from water-rights permitting, but that's a state baseline, not a county confirmation.

Private wells & water rights

Generally allowedPrivate wells statewide are regulated by the South Dakota Department of Agriculture and Natural Resources (DANR) Water Rights Program under state well-construction standards. No Corson County-specific well ordinance was found, so the state rule applies as the baseline.

Living disconnected from utilities

Varies locallyNo South Dakota law bars off-grid living, and electrical work is licensed statewide by the SD Electrical Commission with an owner's exemption for work on your own residence. No Corson County-specific ordinance on utility disconnection was found.

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 5.0 hrs/day
Worst month (sizes an off-grid array): 2.8 hrs/day
Yearly output per 1 kW of panels: 1,449 kWh

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Weather1991-2020

Precipitation: 17 in/yr
Snowfall: 41 in/yr
Heating degree days: 7,838 (severe)
Frost-free season: May 7 to Sep 28

How far help isstraight-line

Hospital: none within range
Fire station: none within range
Hardware store: none within range
Grocery Country Market Grocery: 24.7 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 57641).

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.