Research posture

No market-specific certification rule published yet — rows are held to the global standard on the methodology page.

What keeps candidates out

Our researchers reviewed 131 candidates for United States: 85 made it in, 38 were rejected, 8 are still being verified. Top rejection reasons:

Source Unreachable ×5Missing Underground Area ×3No Bunker Evidence ×3Broader Farm Property Price ×2Broader Large Acreage Property Price ×2Source Unreachable Rejected ×2

Diligence notes

▸ Transferable lease assignment rather than fee-simple ownership

▸ Discreet broker-tour article with exact location masked; buyer must verify current status title and the first earth-home area with broker records

▸ Archived or secondary evidence; current transferability not confirmed

▸ FSBO listing masks exact map location for security; buyer access requires advertiser vetting

▸ FSBO listing is a discreet sale; detailed location and shelter dimensions are available only to qualified buyers

▸ Listing is pending rather than fully active; buyer must verify status and underground-home scope before treating as available supply

▸ Land listing is an underground-build opportunity rather than a completed bunker; buyer must verify permits and construction feasibility

▸ Broader rural property sale; hidden bunker is included but not separately measured or priced