Mayor Mamdani Releases Searchable Database of Luxury Property Owners

New York City Mayor Zohran Mamdani authorized the publication of a searchable database through the Department of Finance identifying property owners potentially subject to a new state pied-à-terre tax on unoccupied, non-primary residences. While City Hall defended the move as a transparency requirement under state law, the list drew immediate backlash for its scope. Although intended to target luxury homes, the database contained over 960,000 entries—vastly exceeding the 31,000 targeted homes—and reportedly included middle-class residences and a shopping center.

Critics, including Council Minority Leader David Carr and the Real Estate Board of New York, characterized the publication as a form of doxxing that exposes affluent homeowners to harassment and security risks. Steven Fulop of the Partnership for NYC called the move a dangerous precedent, while some business leaders cited the murder of United Healthcare CEO Brian Thompson as a reason to fear targeted violence. The list reportedly includes high-profile figures such as Michael Dell and James Dolan.

By July 30, the administration began rolling out the tax by sending notices to 17,000 residents. Homeowners must prove their properties are primary residences by August 24 to avoid the surcharge. Mamdani defended the tax as a tool to ensure the wealthiest residents pay their fair share, stating it was specifically designed for the richest of the rich. In response, the Partnership for NYC is developing a strategy to elect officials opposed to Mamdani's Democratic Socialists of America affiliation.