New Mexico · Off-grid & homestead potential
Union County scores 34/100 on the Bolthole Index, a marginal county profile. Its strengths are manageable long-term carry cost and deep seclusion — about 50 people within a 30-minute drive. The trade-offs: thin water margin (16.2″/yr rainfall) and elevated current hazard exposure.
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Evidence strength: 93%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →
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Property hunt
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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.
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What it takes to build here — permits, zoning, and septic — scouted from Union County’s own official sources.
Union County has no local building department; the NM Construction Industries Division (CID) is the authority having jurisdiction and issues residential building permits in unincorporated areas of the county.
NM Regulation and Licensing Dept - Construction Industries Division ↗Not published on an official source — confirm with the county.
Septic (liquid waste) systems statewide, including Union County, are permitted by the NM Environment Department; a permit is required before installation.
New Mexico Environment Department - Onsite Wastewater Program ↗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 NM Construction Industries Division (building) / NM Environment Department (septic) before you buy or build. Scouted Jul 2026 from official county sources.
Whether a new home can legally get its own water here — the sub-state groundwater regime, from New Mexico’s water agency.
This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.
Nearly all developed New Mexico lies inside an OSE 'declared' underground water basin, but a household 72-12-1.1 domestic well is a by-right permit the State Engineer issues even in closed/over-appropriated basins (metering can be required). The by-right amount is cut to 0.25 acre-ft/yr in a declared Domestic Well Management Area, and a few basin-specific orders cap it further (Gallup Order 197, Zuni Order 199) or stop issuing new domestic permits entirely (Hot Springs Order 198).
Limit: 1 acre-ft/yr by right (NMSA 72-12-1.1); 0.25 acre-ft/yr in a declared Domestic Well Management Area
NM OSE domestic well rules, 19.27.5 NMAC ↗OSE-declared Article-7 groundwater basin; new non-domestic (72-12-3) appropriations require an OSE permit showing unappropriated water. The 72-12-1.1 household domestic well remains by-right — no Domestic Well Management Area is declared in New Mexico. OSE-declared basin centered on Quay County (Order 155, 1998).
NM OSE Article 7 (Declared Underground Water Basins) ↗OSE-declared Article-7 groundwater basin; new non-domestic (72-12-3) appropriations require an OSE permit showing unappropriated water. The 72-12-1.1 household domestic well remains by-right — no Domestic Well Management Area is declared in New Mexico. OSE 2019 guidelines apply block administration to the thin (<50 ft) Ogallala/High Plains aquifer; guidelines expressly exempt 72-12-1.1 domestic wells.
NM OSE Eastern Clayton Basin Guidelines (2019) ↗Prior-appropriation state (first in time, first in right). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the New Mexico state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.
Union County scores 34/100 on the Bolthole Index, a marginal county profile. Its strengths: manageable long-term carry cost and deep seclusion — about 50 people within a 30-minute drive. Watch-outs: thin water margin (16.2″/yr rainfall) and elevated current hazard exposure.
Union County generally requires a residential building permit. Onsite septic is permitted by New Mexico Environment Department - Onsite Wastewater (Liquid Waste) Bureau. Rules change and cities within the county differ — always confirm with the county before you buy or build.
Land in Union County runs about $852 per acre, based on the latest county data.
Union County gets about 16.2" of rain a year, with severe drought in roughly 46.8% of years. On water rights, Union County lies in the Tucumcari Underground Water Basin — OSE-declared Article-7 groundwater basin; new non-domestic (72-12-3) appropriations require an OSE permit showing unappropriated water. The 72-12-1.1 household domestic well remains by-right — no Domestic Well Management Area is declared in New Mexico. OSE-declared basin centered on Quay County (Order 155, 1998)..
A representative private-land location has about 50 people within a 30-minute drive and 27,826 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 Union County means bringing your own water and power. The kit we’d start with:
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