NYC Judge Orders Mamdani To Redo Second-Home Tax Rollout

A Staten Island judge has ordered New York City Mayor Zohran Mamdani’s administration to overhaul its rollout of a tax on high-value second homes, siding with residents who said the city wrongly flagged their primary residences and forced them to prove they should not be taxed.

Justice Wayne M. Ozzi ruled Tuesday that officials must replace a sweeping public property list and cancel approximately 17,000 notices sent to homeowners.

The city immediately appealed, invoking a stay that pauses the judge’s order and allows the administration to continue implementing the surcharge while the dispute proceeds.

The result leaves homeowners in an uncertain position: they secured a ruling against the city’s procedures, but those procedures have not immediately stopped.

Ozzi’s decision concerns how the administration identified potentially taxable properties. It does not invalidate the pied-à-terre tax itself.

The surcharge applies to non-primary residences valued above $5 million and certain co-ops valued at $1 million or more. Backed by Gov. Kathy Hochul, the measure forms part of Mamdani’s fiscal 2027 strategy for closing New York City’s budget gap.

The administration promotes the tax as a means of financing public services. The homeowners’ successful challenge, however, centered on whether the government had done the necessary work before telling residents they might owe it.

Three petitioners said the city incorrectly treated their primary homes as possible second residences. That designation required them to seek exemptions or risk facing the surcharge, even though they maintained their properties should never have been flagged.

Attorney Randy Mastro, who represents the plaintiffs, argued that the administration had transferred its own responsibility to the people it sought to tax.

In his account, officials should have examined available records to determine which properties qualified before requiring homeowners to establish that they did not.

The judge’s ruling addresses both the public tax roll and the notices sent directly to residents.

In July, the Department of Finance published a roll containing the names and addresses of more than 900,000 homeowners. According to the report, that list included owners whose properties were not subject to the surcharge.

Ozzi ordered the city to remove the roll and replace it with one identifying properties actually covered by the tax.

He also directed officials to cancel the approximately 17,000 notices that instructed recipients to claim exemptions or face the surcharge.

Before sending replacement notices, the city must make an individualized initial determination using information already available to it, the ruling said.

That requirement places the first step back with government officials. Rather than broadly warning residents and leaving them to correct mistakes, the administration would have to assess a property’s status before initiating the notice process.

The ruling arrived roughly a week before the October 6 deadline for homeowners to seek exemptions, making its practical effect particularly consequential for recipients still determining how to respond.

Mamdani’s administration rejected the decision.

A spokesman for the mayor called the ruling “wrong.” Spokesman Matt Rauschenbach defended the underlying policy, arguing that owners of luxury second homes should help support schools, streets and parks.

He presented the surcharge as a question of fairness and accused wealthy opponents of seeking to preserve their privilege.

That political defense does not resolve the procedural question before Ozzi: whether the city properly identified affected properties before placing the burden of seeking relief on homeowners.

The administration’s appeal, filed Tuesday evening, prevents the lower court’s order from taking immediate effect. Officials can therefore continue the existing implementation process while the order requiring a new rollout remains stayed.

The appeal also leaves unresolved when a revised tax roll might appear or whether replacement notices will be issued.

For residents, the dispute extends beyond the amount of a potential bill. The publication of more than 900,000 names and addresses has raised privacy concerns, particularly for owners whose properties do not qualify for the tax.

The mailed notices create a separate burden. Seeking an exemption can require time, records and paperwork, even when a homeowner believes the city’s initial classification was mistaken.

Neither concern means the tax has been abolished. The enacted surcharge remains in place, and Ozzi’s ruling addresses its administration rather than its constitutional validity.

A separate lawsuit filed Tuesday takes aim at the law itself.

Suffolk County homeowners and a co-op allege that the measure discriminates against nonresidents, applies retroactively and imposes unconstitutional burdens. Those claims have not been established by Ozzi’s ruling and belong to a different case.

According to CNN, that lawsuit also raises concerns about confusion, privacy and the alleged transfer of responsibility from city officials to homeowners.

The administration now faces challenges on two fronts: defending the tax’s legal foundation and defending the way it has attempted to collect it.

For homeowners who say they were wrongly targeted, Tuesday’s ruling establishes an important point about government accountability. The city’s revenue goals do not eliminate its obligation to determine whom a tax actually covers before demanding that residents prove they are exempt.