Personalised disaster prep has grown into a multimillion-dollar business, fueled by a seemingly endless stream of new and revamped threats.

In his pitch to potential buyers, Larry Hall touts his condominium's high ceilings and spacious living rooms. Then there are the swimming pool, saunas and movie theatre. But what really sets the development apart, in his view, is its ability to survive the apocalypse.

Hall has converted a former military nuclear missile vault into a luxury condominium built 15 stories into the Earth's crust. He is a leader among a new group of real estate developers investing in the nation's

Advertisement
Advertisement