New York City Mayor Mamdani just uploaded searchable database in an Excel sheet containing home addresses of thousands of wealthy residents online.

The claim is true because multiple reliable sources confirm that New York City Mayor Zohran Mamdani's administration publicly uploaded a searchable database containing the names and home addresses of thousands of wealthy property owners potentially subject to the new pied-à-terre (second home) tax.

At a glance

Key Evidence

Verified July 28, 2026

Multiple sources including The Post Millennial, Times Now, Yahoo News, and silive.com report that the Mamdani administration published a searchable database with names and addresses of wealthy NYC property owners potentially liable for the pied-à-terre tax.
The Times of India confirms notification letters were sent to these homeowners.
Critics warn that this database exposes residents to privacy violations and safety risks.

The reporting

What the Evidence Shows

Several independent news outlets and reports from July 2026 verify that Mayor Zohran Mamdani's administration released a publicly accessible, searchable database listing names and addresses of property owners whose homes might be affected by the city's new pied-à-terre tax. This database includes thousands of wealthy residents owning expensive second homes or properties valued over one million dollars that are not primary residences.

The release has sparked significant controversy and criticism over privacy and security concerns, with some sources describing it as effectively 'doxxing' these individuals. The data was derived from public property assessment records but was compiled in a way that made it easily searchable online, raising fears about safety risks for those listed. The mayor also sent notification letters to these property owners as part of the tax enforcement process.

While the information is based on public records, the manner of publication and accessibility is unprecedented and has drawn widespread media attention.

Primary trail