Appeals Court Clears Mamdani’s Pied-à-Terre Tax on Luxury Second Homes

A New York appeals court has cleared the way for Mayor Zohran Mamdani’s tax on luxury second homes, throwing out a lawsuit that challenged how the city rolled out the surcharge. A unanimous four-judge panel of the Appellate Division, Second Department, ruled on Wednesday, 4 November, that the homeowners who sued had not shown the tax’s implementation caused them a concrete injury — and so lacked standing to bring the case. The decision lets New York City press ahead with collecting the levy, known as a pied-à-terre tax, while separate constitutional challenges to the tax itself remain pending.

What the court decided

The panel reversed a 29 September ruling by Staten Island Supreme Court Justice Wayne Ozzi, who had ordered the city’s Department of Finance to withdraw about 17,000 tax notices and scrap a supplemental property roll listing more than 900,000 residential properties. Ozzi found that finance officials had improperly required homeowners to prove their primary residency before granting exemptions.

The appeals court disagreed that the homeowners had been harmed. Receiving an informational notice about potential tax liability, or appearing on a publicly available property roll, was not enough to establish a legal injury, the judges held. The panel compared the notice to a debt-collection letter, which alone does not amount to harm, and rejected the argument that the time and cost of seeking an exemption counted as injury, noting that all taxpayers bear compliance costs. Commercial Observer reported that the judges wrote: “These public and published assessments contain much of the same information as the supplemental roll at the heart of this appeal.”

“Today, an appeals court rejected an attempt by the ultrawealthy to avoid paying their fair share and ruled in favor of the City in a lawsuit challenging the rollout of the pied-à-terre surcharge,” Mamdani said in a statement on Wednesday.

The tax at a glance

The surcharge was proposed by Mamdani and Governor Kathy Hochul on Tax Day 2026 and signed into law by Hochul in May as part of the 2026–27 state budget. It took effect on 1 July. It applies to single-family second homes valued at $5 million or more, and to condominium and cooperative units worth at least $1 million.

The tax was projected to bring in more than $500 million a year. A report by Comptroller Mark Levine put the potential revenue at up to $510 million, while cautioning that the realistic yield could be between $340 million and $380 million once exemptions and appeals are taken into account. The Real Deal reported that exemptions granted by the Department of Finance have already shrunk the pool of properties potentially liable to fewer than 9,000 homes, with more appeals expected when the Tax Commission hears cases.

The ruling lands in a week when voters elsewhere weighed in on taxing the wealthy: California voters rejected a billionaire tax in Tuesday’s election. Mamdani’s office was also involved this week in helping a grieving Ghanaian mother secure an emergency US visa to attend her teenage son’s funeral in New York.

The fight is not over

Wednesday’s ruling settles only how the city administered the tax, not whether the tax itself is lawful. Two separate lawsuits challenging the surcharge on constitutional grounds are still pending, including one brought by billionaire casino developer Steve Wynn and former US Commerce Secretary Wilbur Ross, who argue that it unlawfully discriminates against non-residents and burdens interstate commerce. Those cases are due to be argued in December.

Randy Mastro, the former deputy mayor representing the homeowners in the dismissed rollout challenge, said the appeals court “avoided addressing the merits of this case” and that he would continue to pursue the constitutional challenge, arguing that the “ultimate day of reckoning” for the surcharge will come next month.

Mamdani said his administration would keep defending the law. “We will continue working with our partners in Albany to defend this law against the ongoing challenges in Suffolk County — brought by some of the same uberwealthy interests whose arguments just lost in court today,” he said.

The decision is the latest in a run of court rulings shaping national policy, after a federal judge blocked a US deportation flight that would have sent Afghans back to Taliban-controlled territory. For now, though, New York City can continue preparing to collect a tax its mayor has made a centrepiece of his agenda — while its opponents prepare for a bigger test in December.