It is the first time the federal government has required real estate companies to disclose names behind all-cash transactions, and it is likely to send shudders through the real estate industry, which has benefited enormously in recent years from a building boom increasingly dependent on wealthy, secretive buyers.
The initiative is part of a broader federal effort to increase the focus on money laundering in real estate. Treasury and federal law enforcement officials said they were putting greater resources into investigating luxury real estate sales that involve shell companies like limited liability companies, often known as L.L.C.s; partnerships; and other entities.
Officials said the new government efforts were inspired in part by a series last year in The New York Times that examined the rising use of shell companies as foreign buyers increasingly sought safe havens for their money in the United States.
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The department will focus on sales that are both paid for all in cash and conducted using shell companies. The government is requiring title insurance companies, which are involved in virtually all sales, to discover the identities of buyers and submit the information to the Treasury. The government will put the information into a database for law enforcement.
The Treasury’s program will affect billions of dollars in real estate transactions. In Manhattan, the initiative requires buyers in sales of more than $3 million to be reported; in Miami-Dade County, it requires reporting on sales of more than $1 million. In Manhattan, 1,045 residential sales cost more than $3 million in the second half of 2015, worth some $6.5 billion in aggregate, according to PropertyShark, a real estate data company.
In addition to starting in only two markets, the requirement runs from March through August. If Treasury officials find that many sales involved suspicious money, Ms. Calvery said, they would develop permanent reporting requirements across the country.
In New York, The Times examined a decade of ownership at an iconic condominium complex near Central Park, the Time Warner Center, and found a number of hidden owners who had been the subjects of government investigations. They included former Russian senators, a former governor from Colombia, a British financier, and a businessman tied to the prime minister of Malaysia, who is now under investigation…