Can you live off-grid in Twin Falls County, Idaho?
70
of 100
Significant challenges
Possible, but water will be hard. Only about 11 inches of rain falls a year, so you will rely on a well or hauled water. The ground is mostly flat and drains well, which keeps building simple. The growing season is only about 130 frost-free days, so plan on cold-hardy crops and a greenhouse.
What the land says
Rain
Desert rain. Plan on a well or hauled water, and on irrigating anything you grow.
About 11 inches a year (PRISM, 1991 to 2020 average)
Wells
Well depth varies a lot here. Get a local driller's quote before you offer.
Typical well depths here range from 160 feet to 670 feet
Growing season
Short. Start seeds indoors and favor cold-hardy crops.
About 130 frost-free days, USDA zone 6b; last frost about May 17, first about October 5
Sun
Good sun. Size the array and battery bank for winter.
About 5.4 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
Wildfire risk is high in places. Check the risk for the parcel you want.
U.S. Forest Service wildfire hazard map: Very Low to Very High 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 4,390 feet above sea level
Soil
Good ground for a standard septic system. The county's soil test decides.
Silt 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 0.8 miles (OpenStreetMap)
Check an Idaho 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
Twin Falls County zones land outside its towns and publishes its zoning map. Our free lookup shows the district for any address.
Building code
Idaho's residential code (the 2018 International Residential Code with state changes) is enforced only by cities and counties that choose to run a building permit program; where a county has none, there is no county building permit for a house.
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.
Depends on depth, which varies here. Get a driller's quote.
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 $9,000
From the nearest road to a house site
Clearing
$1,000 to $5,000
A house site, solar, and garden
Total
$28,000 to $57,000
Before the house, plus the well
Before you make an offer on land here
Well depth
Get a local driller's depth estimate.
Typical well depths here range from 160 feet to 670 feet.
Wildfire
Ask an insurance agent whether they will write a policy.
The U.S. Forest Service rates wildfire risk high in places.
Zoning
Look up the parcel's zoning district with our free tool.
The county publishes its zoning map.
Nearby counties
95,156 people live in Twin Falls County, about 49.5 per square mile. It ranks tied for 33rd of the 44 Idaho counties we scored, and Idaho ranks 40th of 50 states.