A Staten Island judge has temporarily blocked New York City Mayor Zohran Mamdani’s controversial tax on certain second homes, handing his administration a legal setback just as the city was preparing to move forward with the new surcharge.
The order does not permanently kill the tax, but it puts enforcement on hold while a lawsuit challenging the city’s handling of the program moves through the courts. A hearing is scheduled for August 31.
The so-called pied-à -terre tax applies to certain properties that are not used as an owner’s primary residence. Under the city’s rules, one-, two-, and three-family homes with a Department of Finance market value above $5 million may be subject to the surcharge. Condominiums and cooperative apartments valued at $1 million or more can also fall under the program.
That distinction matters because simply receiving a notice does not necessarily mean a homeowner owes the tax. The city has required property owners who believe their homes qualify as primary residences to apply for an exemption.
🇺🇸 Mamdani is getting sued over that 2nd-home tax.
He put out a public list of nearly 1M properties with owners’ names and addresses that might get hit, and now homeowners are in court saying the whole rollout was a mess that opens people up to targeting.
A judge will hear the…
— Mario Nawfal (@MarioNawfal) August 10, 2026
And that is where much of the controversy began.
Homeowners challenging the rollout argue that the city effectively put the burden on residents to prove they should not be taxed, even in cases where people say they have lived full-time in the properties for years. The lawsuit was brought after thousands of notices were mailed and a much larger database of potentially affected properties was made publicly searchable.
According to reporting on the court fight, nearly one million properties appeared on the broader list, while roughly 17,000 addresses received notices connected to the surcharge. Critics complained that the database unnecessarily exposed information about homeowners while also sweeping in properties that ultimately might not be subject to the tax at all.
That rollout created a political headache for Mamdani’s administration well beyond the usual conservative criticism of higher taxes. Even some New Yorkers who might otherwise support raising revenue from wealthy property owners objected to the way the city identified and publicly listed potentially affected residents.
The administration has defended the tax as a way to raise additional revenue from expensive properties that are not being used as primary homes. City officials have said the program is intended to help address New York’s budget pressures without shifting more of the burden onto working residents.
Estimates have suggested the surcharge could generate roughly $500 million, although the exact amount would depend heavily on which properties ultimately qualify, how owners respond and how many successfully claim exemptions. A New York City Comptroller analysis of similar tax parameters found that revenues could approach that level before accounting for behavioral changes and other uncertainties.
🚨 BREAKING: A New York judge has BARRED Mamdani from enforcing his new property tax on secondary residences in the city while a homeowners’ lawsuit proceeds
Yet another “promise” made by Mamdani that’s falling through 🤣
Mamdani’s “pied-à -terre” tax was put on hold by Staten… pic.twitter.com/qjtTuAD6ch
— Nick Sortor (@nicksortor) August 10, 2026
For now, however, the bigger problem for City Hall is not how much money the tax could raise. It is whether the city can legally and competently administer it.
The Staten Island ruling temporarily stops enforcement while the homeowners’ lawsuit proceeds. The Mamdani administration has indicated it intends to fight the decision, meaning the dispute is far from settled.
What was supposed to be a straightforward attempt to squeeze more revenue out of wealthy second-home owners has instead become a fight over due process, privacy and the basic question of whether residents should have to prove to the government that the homes they actually live in are, in fact, their homes.
