A group of New York City homeowners filed a lawsuit against Mayor Zohran Mamdani and the city’s finance director over the pied-à-terre tax rollout, alleging errors in how the tax roll and notices were released.

A Staten Island judge temporarily blocked the pied-à-terre tax, pausing enforcement on second homes as the case moves forward.

The pause follows claims that the city wrongly identified properties as subject to the surcharge, arguing they are primary residences.

The court set dates for further proceedings, including an order to show cause, replies, and merits arguments, signaling the case will advance in court.

The Department of Finance had sent up to 17,000 exemption notices and posted an assessment roll, with deadlines for exemption applications extending to September 18.

City Hall said it will appeal the ruling and argued the rollout is fair, even as the pause complicates plans to implement the tax.}

Reporting confirms the temporary halt and related court action, with notes that the pause affects notices and the rollout timeline.

About 2,000 residents had completed exemption applications as authorities work through eligibility questions.

The restraining order requires removal of the public assessment roll and bars the city from acting on notices during the lawsuit.

The court order blocks issuing new notices or maintaining the 17,000-name candidate list while the case proceeds.

The exemption deadline was extended to September 18 to give homeowners time to prove primary residence or obtain guidance.

Legal lead is Randy Mastro, former city official, with supporters claiming the ruling protects homeowners’ rights and due process.