Mamdani Wins Court Victory as Judges Clear Way for Controversial Second-Home Tax

New York City Mayor Zohran Mamdani scored a significant legal victory Wednesday when a state appeals court overturned a ruling that had threatened to derail his administration’s controversial tax on luxury second homes, allowing the city to continue implementing the surcharge despite ongoing challenges to its constitutionality.

The unanimous decision by a four-judge panel of the Appellate Division in Brooklyn reversed a September ruling by Staten Island Supreme Court Justice Wayne Ozzi, who had ordered the city to redo its rollout after homeowners complained that thousands of residents were improperly threatened with tax bills.

The tax, known as the pied-à-terre surcharge, targets expensive residential properties that are not used as their owners’ primary residences. It applies to qualifying one-, two-, and three-family homes valued at $5 million or more, as well as certain condominiums and cooperative apartments valued at $1 million or more.

Mamdani welcomed the ruling, saying he was “heartened” by the outcome and promising to continue defending the measure against additional lawsuits.

“From day one, those with the most have attempted to use every legal avenue available to shield their wealth and avoid contributing more to our city,” Mamdani said. “We will implement the pied-a-terre surcharge fairly and efficiently, ensuring that those most able to contribute do their part to build a city that works for everyone.”

The lawsuit was brought last summer by seven New York City homeowners represented by prominent attorney Randy Mastro, a frequent legal adversary of City Hall. The plaintiffs accused the administration of a “botched” implementation process that improperly placed the responsibility on property owners to establish whether they were subject to the new tax.

The controversy erupted after the city’s Department of Finance distributed approximately 17,000 notices to homeowners who potentially owed the surcharge and published a supplemental property tax list containing information about roughly 900,000 properties.

The plaintiffs maintained that city officials should have conducted a more thorough examination of residency records before issuing the notices, rather than requiring homeowners to demonstrate that their properties were their primary residences.

They described the administration’s handling of the process as “arbitrary and capricious,” arguing that people who did not owe the tax were nevertheless forced to navigate a confusing exemption system.

Justice Ozzi initially agreed with the homeowners, determining that recipients of the notices had been “substantially harmed and penalized needlessly.” His September ruling directed the city to restart the notification process.

Wednesday’s appellate decision rejected that conclusion, finding that the plaintiffs had failed to establish the concrete harm necessary to pursue their lawsuit.

“All taxpayers incur time, effort, and costs in determining and complying with their various tax obligations,” the judges wrote, addressing the homeowners’ complaints about the burden of seeking exemptions.

The court also observed that the plaintiffs “have not documented and quantified any actual costs incurred.”

According to the appellate panel, receiving a preliminary tax notification did not, by itself, establish grounds for a lawsuit.

“The mere receipt of the initial determination notices … does not qualify as an injury,” the judges concluded, explaining that the correspondence served “an informational purpose.”

The court also dismissed complaints about the publication of the property information, noting that much of the material was already available through existing public assessment records. The homeowners’ reported “confusion” about the tax was likewise insufficient to establish a legally recognizable injury.

Five of the seven plaintiffs had received notices and were subsequently granted exemptions, while the other two had not alleged receiving notices at all.

The decision did not determine whether the city had followed every administrative requirement correctly. Instead, the judges concluded that the homeowners lacked legal standing to pursue their claims.