New York City Mayor Zohran Mamdani's administration released a massive public database listing the names and addresses of property owners who could face a proposed pied-à-terre tax, and critics from both parties say the move endangers residents.
The NYC Department of Finance published the searchable database as part of what City Hall called a transparency effort tied to the proposed non-primary residence property surcharge. But instead of narrowly targeting the ultra-wealthy second-home owners Mamdani promised the tax would hit, the list ballooned to more than 960,000 entries, sweeping in middle-class homeowners, elected officials, and even a shopping mall, the New York Post reported.
The database allows anyone to search and download property owners' full names and home addresses. Mamdani originally pitched the pied-à-terre tax as applying to secondary homes worth more than $5 million owned by "ultra-wealthy and global elites." The final rules, however, use different Department of Finance valuation thresholds depending on property type, and the result is a list thirty times larger than the roughly 31,000 homes the tax was supposedly designed to reach.
The errors are not subtle. Properties in working-class neighborhoods like Throggs Neck in the Bronx and homes on Challenger Drive on Staten Island, valued far below any reasonable pied-à-terre threshold, appeared in the database. So did the Breezy Point Shopping Center in Queens. Even the homes of sitting elected officials, including Council Minority Leader David Carr and Councilwoman Gale Brewer, were incorrectly flagged.
Carr, a Staten Island Republican, did not hold back.
"It's a reckless and foolish move, especially considering there are potentially thousands of properties on this list that do not qualify as second homes or whose owners will successfully dispute their inclusion."
A Department of Finance spokesperson defended the release, telling Fox News Digital that state law required a property roll to be published for public inspection. From that list, the spokesperson said, the department would identify properties actually subject to the surcharge.
A person familiar with the process said the city has released similar property tax rolls for years under state law. But critics argue this release goes well beyond a routine administrative filing. The database is fully searchable and downloadable, not a dusty binder in a municipal office.
James Whelan, president of the Real Estate Board of New York, said the database exposed a fundamental problem with the proposal itself, not just the way it was rolled out.
"By publishing a database of properties that might be subject to this tax before the tax has even been enacted, City Hall has only added to the confusion surrounding this proposal."
Whelan went further, arguing policymakers needed to examine how many ordinary homeowners stood to be caught in a net built for billionaires.
"What this database really demonstrates is that the second-home tax is far broader and more complicated than its supporters have suggested. Policymakers should take a hard look at the many homeowners who could be swept in despite not fitting the profile of the ultra-wealthy residents this tax was supposedly designed to target."
That gap between the promise and the product is the core issue. Mamdani sold the tax as a tool aimed at global elites parking money in Manhattan penthouses. The database his administration published tells a different story, one where a middle-class homeowner in the Bronx and a hedge-fund billionaire on Central Park South sit on the same list.
Steven Fulop, president and CEO of the Partnership for New York City, framed the release as something more corrosive than mere bureaucratic sloppiness.
"Publishing names and addresses singles out people who have done nothing wrong, at a moment when the far-left already treats success itself as something to be punished."
Mamdani's broader political alignment, he is a product of the Democratic Socialists of America movement, makes the release harder to dismiss as accidental. His administration has repeatedly used class-based rhetoric to frame policy, and the database fits a pattern of publicly identifying private citizens as political targets.
The database did not arrive in a vacuum. On April 15, Mamdani posted a video outside the Manhattan penthouse of Citadel founder Ken Griffin, a 24,000-square-foot residence on Central Park South that Griffin purchased for a record $238 million. The video promoted the pied-à-terre tax and singled Griffin out by name.
Griffin, whose fortune Forbes estimates at roughly $50 billion, called the video "creepy and weird" and argued it put him in harm's way by highlighting his home while promoting higher taxes on the wealthy.
Griffin's experience with hostile city governance is not new. He moved Citadel's global headquarters from Chicago to Miami in 2022 after years of criticizing that city's tax policies and public safety failures. He has warned New York could face similar consequences if officials pursue an agenda hostile to high-income residents and businesses.
The numbers suggest that warning carries weight. Manhattan attracted the nation's most new tax filers between 2022 and 2023, yet the borough still saw a sharp decline in reported income as wealthy residents left. Driving those residents out faster, or making them feel targeted, would shrink the very tax base Mamdani claims he wants to tap.
That tension has become a recurring theme in Mamdani's approach to city finances, where ambitious spending pledges keep colliding with the practical limits of a tax base that can walk away.
Colin Reed, a longtime Republican strategist, connected the database to a broader pattern of political recklessness from Mamdani's office.
"In this era of heightened political violence, this type of inflammatory and divisive rhetoric is not only reckless, but outright dangerous, especially from a public official who not that long ago pledged to be a mayor for all New Yorkers."
Reed argued the mayor was undermining the values New York City has historically represented.
"It's bad enough that the mayor is demonizing success and upward mobility that has so long defined the American dream, and doing so within the city that has defined American capitalism. But to do so by pitting various classes against one another is beneath the office he holds."
John Ashbrook, co-host of the "Ruthless" podcast, was blunter about who he believed would use the database and why.
"Nobody wants this database more than Mamdani's band of communist social media agitators salivating to harass Americans at every turn."
Ashbrook added that Mamdani's online supporters already go after anyone who questions the mayor's decisions, and predicted the same treatment for property owners on the list.
That concern is not abstract. Mamdani has drawn sharp criticism across the political spectrum for his conduct in office, including his controversial posturing on international affairs and a governing style that seems to prioritize ideological performance over competent administration.
Fox News Digital put two straightforward questions to the mayor's office: Why did the administration choose to publish a searchable database rather than notify affected property owners privately? And did the city conduct a legal or privacy review before making the information available online?
Mamdani's office did not immediately respond.
Those unanswered questions matter. The city claims state law required publication of a property roll. But whether the law required, or even contemplated, a searchable, downloadable database that exposes nearly a million residents by name and address is a separate question entirely. The distinction between a routine administrative filing and a public targeting tool is not trivial.
The condemnation has come from both sides. Republicans and Democrats have called the release reckless. The real estate industry says it will undermine confidence in the city. And ordinary homeowners who have nothing to do with the "ultra-wealthy" profile Mamdani described now find their personal information available to anyone with an internet connection.
Meanwhile, the broader socialist movement Mamdani represents continues to gain footholds in Democratic politics, a trend that has prompted calls from figures like James Carville for a full party split over the direction the left is heading.
A city that publishes its residents' home addresses to build support for a tax that hasn't even been enacted is not governing. It is organizing, and the people on that list are the ones who pay the price.