New York City property-owner advocacy groups are sharply criticizing Mayor Zohran Mamdani's housing agenda, including a new report that blames landlords for the city's affordability crisis and a searchable database of owners who could be affected by a proposed tax on second homes.

Mamdani, a democratic socialist who campaigned on freezing rents, released the «Rental Ripoff Report» recently. The report argues that residents of the nation's largest city are paying too much rent while getting too little in return and offers 23 proposals to address the problem. His administration has also drawn criticism for publishing a searchable database that identifies property owners whose non-primary residences could be subject to the proposed pied-à-terre tax.

The database, released by the city's Department of Finance, allows users to search properties and view the names and addresses of owners who could be covered by the tax. A department spokesperson said publication of the property roll was required by state law. Critics say the move could expose owners to harassment and public safety risks.

James Whelan, president of the Real Estate Board of New York, said the report focuses on symptoms rather than causes. «New Yorkers are paying record-high rents because there is not enough housing, and many of the reported conditions are concentrated in heavily rent-stabilized buildings that are facing significant operational and financial challenges,» he said. He accused the administration of painting property owners with a broad brush and unfairly characterizing an entire industry.

«Seven months into this administration, it is time to prioritize policies that will truly make New York more affordable by increasing housing supply and preserving existing housing,» Whelan said.

Whelan also warned about the publication of the property database, saying it could put smaller owners in the crossfire of a clumsily directed policy. Publishing a list of properties that might be subject to a tax before the tax has been enacted has only added to the confusion, he said. The database shows that the second-home tax is broader and more complicated than supporters have suggested, and policymakers should take a hard look at homeowners who could be swept in despite not fitting the profile of the ultra-wealthy residents the tax was designed to target.

Ann Korchak, board president of Small Property Owners of New York, delivered a harsher assessment. She said Mamdani put a target on the backs of property owners from the start of his mayoral campaign and accused him of using political stunts such as what she called «rental rip-off hearings.» Korchak said city officials have gone door-to-door to organize tenants while on the taxpayer's dime.

«They are not tenant organizers, they're city officials who represent all New Yorkers — including thousands of small owners,» Korchak said. She described the hearings as political theater, saying the process was no more independent or objective than the Rent Guidelines Board that she said delivered the rent freeze Mamdani demanded. She cited a board member who resigned because of what she described as a rigged process.

Korchak said the mayor's housing agenda will punish small businesses and immigrant families who own buildings. The rent freeze sets owners up for failure, she argued, because operating costs for insurance, utilities, energy, repairs, and labor continue to rise even as rents stay frozen. Many rent-stabilized buildings, she said, are already at the edge of an economic cliff. If they fall into disrepair because of Mamdani's policies, she predicted, the city will illegally take private buildings from mom-and-pop, immigrant, and multi-generational owners and convert them into socialized housing or give them to preferred nonprofit providers.

The proposed pied-à-terre tax would add further pressure, Korchak said, calling it «another nail in the coffin.» Creating fear and financial pressure on modest owners who have put their life savings into their properties would destroy the fabric of neighborhoods, she said.

«His list is a database that proves he is targeting property ownership as a whole. No one is safe,» Korchak said.

The mayor's office did not immediately respond to a request for comment.