Judge blocks NYC pied-à-terre tax rollout as Trump weighs federal intervention

A Staten Island judge halted Mayor Zohran Mamdani's pied-à-terre tax after the city published the names and addresses of more than 900,000 homeowners without following basic state tax law, and now President Trump says he may step in.

Staten Island Supreme Court Justice Wayne Ozzi issued a temporary restraining order blocking key parts of the rollout, finding the Mamdani administration failed to make required individualized determinations before mailing notices to roughly 17,000 property owners. The order requires the city to take down the disputed property list and bars officials from imposing or collecting the surcharge until at least an August 31 hearing.

One day later, Trump took to Truth Social to warn that the tax would drive wealthy residents out of New York for good. He said his administration is examining whether the federal government has legal authority to intervene, though neither the White House nor Trump identified a specific statute or executive power that would apply.

City Hall skipped required steps and exposed 900,000 homeowners

The surcharge targets second homes valued at $5 million or more, along with condominiums and co-ops worth more than $1 million, at rates reaching as high as 6.5 percent. The Mamdani administration projected the tax would generate roughly $500 million a year. But the rollout went off the rails almost immediately.

Three homeowners filed suit, arguing the city botched implementation by publishing a massive online database listing names, addresses, and property values of more than 900,000 New York City homeowners, the vast majority of whom do not owe the surcharge. Some homeowners flagged by the list complained they had lived in their properties for years as primary residents and should never have been included.

Justice Ozzi agreed. Fox News reported the court found the administration caused irreparable harm by publishing the list without first conducting the individualized reviews that state tax law requires. Instead of vetting properties before sending notices, City Hall shifted the burden onto homeowners to prove they did not owe the tax, a process the judge found likely violated the law.

The ruling found the plaintiffs were likely to succeed on the merits. That is not a final judgment, but it is a sharp rebuke of how the administration handled a program it had months to prepare.

Randy Mastro, the attorney representing the homeowners, did not hold back outside the courthouse. Just The News reported his remarks after the ruling:

"The city screwed this up... got it wrong... stop the train and make them do it over. The city is to bear the burden. They didn't do their homework."

Mamdani's spokesman calls the surcharge a matter of 'fair share'

The mayor's office pushed back. Spokesman Matt Rauschenbach said in a statement that the administration disagrees with the ruling and remains confident in the surcharge and the city's ability to carry it out. He framed the tax as a question of equity:

"This surcharge asks those who own second homes valued at $5 million or more to contribute their fair share to the city they benefit from."

Mamdani has said approximately 17,000 homeowners in a city of 8.5 million are potentially affected. His administration has filed an appeal. But the gap between 17,000 targeted owners and 900,000 names dumped onto a public website is the heart of the legal problem, and the political one.

New York City Councilwoman Inna Vernikov offered a harsher assessment. The Washington Examiner quoted her calling the surcharge "Marxism in practice: consistently promising to better the lives of the middle class by punishing the wealthy."

That label carries extra weight given Mamdani's broader policy record. The mayor, a self-described socialist, has already drawn national attention for a plan to open city-run grocery stores with taxpayer-subsidized prices, a proposal critics said amounted to government competing with private business using public money.

Trump frames the tax as an accelerant for New York's wealth drain

Trump's Truth Social post, published the day after the court order, cast the surcharge as part of a broader pattern of fiscal recklessness in New York. Fox Business reported his full statement, in which he argued the revenue the city hopes to collect is dwarfed by the taxes lost when wealthy residents leave permanently:

"The NYC Pied-a-Terre Tax is costing New York City and State a fortune in that the money, eventually to be gotten, is very little compared to to the TAXES PAID by the tens of thousands of people who are fleeing the City, never to return."

He named Florida and Texas as states benefiting financially from the exodus. And he linked the surcharge to New York's congestion pricing program, calling the combination a path to certain ruin.

Trump also raised the possibility of direct federal action, though he stopped short of identifying a specific legal mechanism:

"I am looking to see if the Federal Government has any legal right to avert this disaster, before it is too late, for the millions of people who cherish New York and want to see it thrive."

The White House did not respond to Fox Business' request for additional details about what federal authority or action the administration is considering. Governor Kathy Hochul's office also declined to comment. Whether the federal government has any direct legal lever to block a city-level tax surcharge remains an open question, one neither the president nor his staff has yet answered publicly.

Mamdani's relationship with both Washington and his own constituents has grown increasingly strained. Earlier this year, roughly 3,500 New Yorkers booed him off stage at an NYPD event on Staten Island, the same borough whose court just blocked his tax rollout.

A pattern of confrontation with federal authority

The pied-à-terre fight is not the first time Mamdani has found himself at odds with the Trump administration. The mayor previously pledged to defy a Supreme Court ruling on Temporary Protected Status, a stance that drew criticism from figures as ideologically varied as Senator John Fetterman, who warned it invited a constitutional crisis.

Trump himself has previously called socialist primary winners in New York a national threat, singling out the policy direction that Mamdani now represents from City Hall.

Whether the federal government ultimately has a role to play in a city tax dispute is far from settled. But the court record so far tells a simpler story: the Mamdani administration rushed a tax rollout, cut procedural corners, exposed hundreds of thousands of homeowners who had nothing to do with the surcharge, and got stopped by a judge who said the city did not do its homework.

Breitbart reported that some of the homeowners caught up in the list were long-term primary residents who should never have been flagged, collateral damage from an implementation that prioritized speed over accuracy.

The New York Post noted that Governor Hochul distanced herself from the botched rollout, a signal that even Albany sees political risk in standing too close to the mayor's handling of the surcharge.

The next court date is August 31. The Mamdani administration has appealed. And the 900,000 homeowners whose names and addresses were published without cause are left waiting to see whether the city that exposed their information will face any real accountability for doing so.

When a city government cannot even implement its own tax without a judge ordering it to start over, the problem is not the wealthy residents heading for the exits, it is the people running the building they are leaving behind.