Bolthole Index

South Dakota · Off-grid & homestead potential

Dewey County

44Index Score / 100
#41 of 66 in South Dakota

Dewey County scores 44/100 on the Bolthole Index, a marginal county profile. Its strengths are manageable long-term carry cost and deep seclusion — about 144 people within a 30-minute drive. The trade-offs: thin water margin (18.7″/yr rainfall) and elevated current hazard exposure.

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County locator

Dewey County in South Dakota

44
County map
Dewey County highlighted among the South Dakota counties · colored by Index score

How Dewey County scores

Seclusion8280% ev.
Self-Sufficiency16100% ev.
Admin Boringness5935% ev.
Durability38100% ev.
Property Autonomy67100% ev.
Carry Cost83100% ev.

Evidence strength: 85%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$75kTypical home
1.3%Property tax
$1,109Land / acre
18.7"Annual rain
14.7% of yrsSevere drought
13 / yr (+9.5)Mid-century 100°F days
22.4 daysMid-century dry spell
1.28" (+7.8%)Mid-century 1-day rain
1.39×Wildfire change factor
100%Forward climate coverage
$1,694Home insurance / yr
1.6% / yrInsurance growth
1.41%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
144People within 30 min
18,158People within 2 hr
713Radius comparison (15 mi)
2.3People / sq mi
6.8%Federal land
92.2%Land at 15% slope or less
3.9%Septic soil without severe limits
53,869 acWorkable land screen
1.9%Wooded land
10 tonsBiomass / forest ac
45.1°FAvg temp

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Property hunt

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A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.

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Building & land-use rules in Dewey County

What it takes to build here — permits, zoning, and septic — scouted from Dewey County’s own official sources.

  • Building permitNot published

    Not published on an official source — confirm with the county.

  • County zoningNot published

    Not published on an official source — confirm with the county.

  • Septic permittingSouth Dakota Department of Agriculture & Natural Resources (DANR)

    Onsite wastewater/septic systems are regulated statewide by SD DANR under Administrative Rules Chapter 74:53:01, with installer certification via the SD Plumbing Commission.

    South Dakota DANR - Septic Tank Systems ↗
  • Owner-builderNot published

    Not published on an official source — confirm with the county.

  • Building inspectionsNot published

    Not published on an official source — confirm with the county.

  • Occupancy certificateNot published

    Not published on an official source — confirm with the county.

  • Septic permitNot published

    Not published on an official source — confirm with the county.

  • Septic inspectionNot published

    Not published on an official source — confirm with the county.

  • Off-grid sanitationNot published

    Not published on an official source — confirm with the county.

Always confirm current rules with South Dakota DANR (septic); no county planning/zoning department identified before you buy or build. Scouted Jul 2026 from official county sources.

Living off-grid in Dewey County, South Dakota

Is Dewey County a good place to live off-grid or homestead?

Dewey County scores 44/100 on the Bolthole Index, a marginal county profile. Its strengths: manageable long-term carry cost and deep seclusion — about 144 people within a 30-minute drive. Watch-outs: thin water margin (18.7″/yr rainfall) and elevated current hazard exposure.

Do you need a building permit in Dewey County, South Dakota?

Building-permit rules for unincorporated Dewey County are not published on an official source. Onsite septic is permitted by South Dakota Department of Agriculture & Natural Resources (DANR). Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Dewey County, South Dakota?

Land in Dewey County runs about $1,109 per acre, based on the latest county data.

What is the water situation in Dewey County?

Dewey County gets about 18.7" of rain a year, with severe drought in roughly 14.7% of years.

How remote is Dewey County?

A representative private-land location has about 144 people within a 30-minute drive and 18,158 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Off-grid gear

Going off-grid in Dewey County means bringing your own water and power. The kit we’d start with:

WaterCrystal QuestFilter any source — well, rain, or creek — to drinking-clean.PowerBluettiSolar generators and home battery backup for living off the grid.

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How Dewey compares in South Dakota

Compare side-by-side →See all 66 South Dakota counties ranked →