Texas · Off-grid & homestead potential
Castro County scores 39/100 on the Bolthole Index, a marginal county profile. Its strengths are low administrative friction for a quiet rural property and manageable long-term carry cost. The trade-offs: thin water margin (19.3″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.
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Evidence strength: 96%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →
Scout Castro 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 Castro County’s own official sources.
Under Texas Local Government Code, counties lack authority to require residential building permits in unincorporated areas; Castro County's website shows no building/permitting department, consistent with the statewide framework.
Texas county authority for building permits/zoning (Local Gov't Code framework) ↗Texas counties have no zoning authority in unincorporated areas ('there are no zoning regulations'), and Castro County maintains no planning/zoning department.
Texas county authority for building permits/zoning (Local Gov't Code framework) ↗OSSF/septic permits are required under Texas Health & Safety Code Ch. 366; with no local authorized agent identified for Castro County, the TCEQ Region 1 (Amarillo) office is the default permitting authority.
TCEQ - Getting a Permit for an OSSF (Septic System) ↗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.
Texas TCEQ requires OSSF permits but recognizes statutory exemptions including qualifying single-family tracts under the 10-acre rule.
Texas Commission on Environmental Quality OSSF Permits ↗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 TCEQ Region 1 (OSSF) / Castro County before you buy or build. Scouted Jul 2026 from official county sources.
Castro County scores 39/100 on the Bolthole Index, a marginal county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: thin water margin (19.3″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.
Castro County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Texas Commission on Environmental Quality (TCEQ) Region 1 - Amarillo. Rules change and cities within the county differ — always confirm with the county before you buy or build.
Land in Castro County runs about $2,130 per acre, based on the latest county data.
Castro County gets about 19.3" of rain a year, with severe drought in roughly 40.3% of years.
A representative private-land location has about 22,509 people within a 30-minute drive and 771,695 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 Castro County means bringing your own water and power. The kit we’d start with:
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