Montana · Off-grid & homestead potential
Custer County scores 48/100 on the Bolthole Index, a solid county profile. Its strengths are deep seclusion — about 10 people within a 30-minute drive and manageable long-term carry cost. The trade-offs: weak self-sufficiency basics: only 14.5″ of rain a year.
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Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →
Scout Custer County
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Property hunt
Search live inventory elsewhere, then cost and vet each candidate here. No copied listings, account, or paid data feed.
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Working estimate
A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.
Before an offer
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What it takes to build here — permits, zoning, and septic — scouted from Custer County’s own official sources.
No residential structural-code building permit is required. However, County has adopted Zoning Regulations (Resolution #2016-31); no structure (including houses) may be erected without a Zoning Permit from the Custer County Zoning Administrator. Because that pre-construction land-use/zoning approval can gate an ordinary dwelling, this record is classified as limited.
Custer County Zoning Regulations ↗County has adopted Zoning Regulations (Resolution #2016-31); no structure (including houses) may be erected without a Zoning Permit from the Custer County Zoning Administrator.
Custer County Zoning Regulations ↗The county Environmental Health/Sanitarian office administers county Onsite Wastewater System Regulations, site evaluations and septic permits, coordinating with Montana DEQ.
Custer County Environmental Health ↗Not published on an official source — confirm with the county.
Not published on an official source — confirm with the county.
Not published on an official source — confirm with the county.
Not published on an official source — confirm with the county.
Not published on an official source — confirm with the county.
Not published on an official source — confirm with the county.
Always confirm current rules with Custer County Planning / Environmental Health before you buy or build. Scouted Aug 2026 from official county sources.
Custer County scores 48/100 on the Bolthole Index, a solid county profile. Its strengths: deep seclusion — about 10 people within a 30-minute drive and manageable long-term carry cost. Watch-outs: weak self-sufficiency basics: only 14.5″ of rain a year.
Custer County requires a building permit only in limited cases (such as floodplains or specific zones), and it enforces county zoning. Onsite septic is permitted by Custer County Environmental Health / Sanitarian (with Montana DEQ liaison). Rules change and cities within the county differ — always confirm with the county before you buy or build.
Land in Custer County runs about $1,017 per acre, based on the latest county data.
Custer County gets about 14.5" of rain a year, with severe drought in roughly 11.4% of years.
A representative private-land location has about 10 people within a 30-minute drive and 2,881 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 Custer County means bringing your own water and power. The kit we’d start with:
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