New York City Mayor De Blasio Mamdani ( Zohran Mamdani ) has just achieved a major victory – and those who own luxury second homes in New York may soon have to pay for it.

On Wednesday, the Appellate Division of the New York State Supreme Court ruled that the city of New York may implement its “pied -à- terre” surcharge. Previously, this tax faced obstacles in September: a judge from Staten Island supported the New York City homeowners who filed a lawsuit against the implementation of this tax. The ruling stated that this tax, which targets second homes valued over $5 million, caused confusion during its implementation and exposed personal information, therefore its method of enforcement needs to be redone. On the same evening, the city of New York applied to suspend the execution of the tax and filed an appeal against the September ruling.

The appellate court overturned this decision and ruled in favor of New York City, explaining that these property owners did not have the legal standing to file a lawsuit and were unable to prove that they had suffered any damages. The ruling stated that the "confusion" cited by the owners was not sufficient to prove actual damage, as it was "too general, far-fetched, and brief." The court also noted that the owners' concerns about potential future damages were "based on speculation about possible scenarios," rather than evidence of actual harm.

Regarding the concerns raised by homeowners—that is, in order to avoid paying this tax, they would have to spend time and money to prove that their home is actually their primary residence—the court stated that tax documentation work usually takes time anyway, and no documents were submitted to substantiate these costs.

Landy Mastro ( Randy Mastro ), the attorney representing the property owner plaintiff, stated in a statement that it is "regrettable" that the court has decided to overturn the ruling from September.

He said, "What New York City is doing here is unacceptable – trying to drag thousands of people who do not owe this additional tax into it, forcing them to prove that they live in their own homes, or else they will have to pay the tax. Now, this lawless and chaotic data collection scheme will not be corrected."

However, this tax still faces other legal challenges before its official introduction.

Wealthy individuals who reside in Florida but own property in New York, as well as businessman Steve Wynn ( Steve Wynn ) and former U.S. Secretary of Commerce Wilbur Ross ( Wilbur Ross ), also filed a lawsuit against the state of New York in September regarding the constitutionality of this tax. Debates surrounding this lawsuit are scheduled to take place in December.

Mastero said, "The day when this 'pied -à- terre' surcharge will finally be put to trial will come next month, and its constitutionality will be determined at that time. We still believe that we will win and completely end this unconstitutional surcharge."