NYC homeowners sue over pied-a-terre tax rollout

A group of New York City homeowners filed a lawsuit on Friday, August 7, 2026, seeking to delay the rollout of a new tax on luxury second homes, arguing the city's chaotic implementation has unfairly burdened residents with proving their primary residency. The suit, filed in New York State Supreme Court in Staten Island, names Mayor Zohran Mamdani, the city, and its Department of Finance as defendants.

The legal challenge does not contest the "pied-à-terre" tax law itself, which was approved by the state legislature and signed by Governor Kathy Hochul in May. That law imposes an annual surcharge on non-primary residences valued at $5 million or more for one-to-three family homes and $1 million or more for condominiums and cooperatives. Officials have estimated the tax could generate at least $500 million in annual revenue for the city.

The plaintiffs' complaint centers on the city's administrative rollout, which they describe as arbitrary and capricious. The controversy began last month when the Department of Finance published an online assessment roll containing nearly one million properties it said "may be subject" to the new surcharge. The city subsequently mailed...