Can you live off-grid in Corson County, South Dakota?
74
of 100
Significant challenges
Possible, but water will be hard. Only about 18 inches of rain falls a year, so you will rely on a well (near 110 feet here) or hauled water. The ground is mostly flat and drains well, which keeps building simple. The growing season is only about 142 frost-free days, so plan on cold-hardy crops and a greenhouse.
What the land says
Rain
Too dry to live on rain. Plan on a well, and on irrigating anything you grow.
About 18 inches a year (PRISM, 1991 to 2020 average)
Wells
Shallow wells, so drilling should be one of the cheaper costs.
The typical well here is about 110 feet deep; a well typically runs $6,000 to $13,000
Growing season
Short. Start seeds indoors and favor cold-hardy crops.
About 142 frost-free days, USDA zone 4a; last frost about May 9, first about September 29
Sun
Good sun. Size the array and battery bank for winter.
About 4.9 hours of full sun a day, averaged over the year
Flood
Flood zones are rare here. Still, look up the parcel on FEMA's flood map.
FEMA maps no flood zones nearby
Wildfire
Low wildfire risk.
U.S. Forest Service wildfire hazard map: Very Low to Low here
Storms
Hurricanes and strong tornadoes are rare here.
NOAA: no hurricane-strength storm within 50 miles since 1975; no strong (EF2 or stronger) tornado within 25 miles since 1990
Terrain
Flat to gentle, easy to build on.
Slopes average about 3%, about 2,090 feet above sea level
Soil
Good ground for a standard septic system. The county's soil test decides.
Loam, well drained (USDA soil survey). A standard system typically runs $5,000 to $10,000
Road
Paved roads are close by.
Nearest paved road usually within about 1 mile (OpenStreetMap)
Check a South Dakota parcel, or plan the one you own
Get a free 0-100 off-grid score.
A step-by-step build plan, sizing your solar, water, garden, septic, heat, and buildings.
Is it legal here?
Zoning
Rural land here is often unzoned. Confirm with the county before you build.
Building code
South Dakota has no statewide residential building code: a city that chooses to regulate houses must use the 2024 International Residential Code and may not be stricter, and the state's default building standard excludes homes and farmsteads. Whether a rural house needs a building permit depends on the county, so ask before you buy.
Rainwater
Collecting it is allowed.
Composting toilets
Allowed.
Water rights
Water belongs to whoever claimed it first. A new well or pond may need a state permit, and a creek may already be claimed.
Drilled to about 110 feet, with pump and pressure tank
Septic
$5,000 to $10,000
Standard system
Solar and batteries
$18,000 to $34,000
Sized for a modest household
Road or driveway
$3,000 to $8,000
From the nearest road to a house site
Clearing
$1,000 to $4,000
A house site, solar, and garden
Total
$33,000 to $69,000
Before the house
Before you make an offer on land here
Zoning
Confirm with the county whether the parcel is zoned.
Rural land in South Dakota is often unzoned.
Soil test
Get a soil test before you count on septic.
The county has to approve the ground before it issues a septic permit.
Road access
Confirm the parcel fronts a public road or has a recorded easement.
Without one, you may not have a legal way in.
Nearby counties
3,782 people live in Corson County, about 1.5 per square mile. It ranks tied for 37th of the 66 South Dakota counties we scored, and South Dakota ranks 39th of 50 states.