He’s trying to Trump the pied-à-terre.

President Trump on Tuesday blasted New York’s new pied-à-terre tax on luxury second homes as “pure Amateur Hour” that will “RUIN” the Big Apple.

Trump, in a Truth Social screed, said he’d direct the federal government to look into the tax before calamity strikes his hometown.

Mamdani’s pied-à-terre tax takes aim at owners of luxury second homes in New York City worth $5 million or more, or $1 million if a co-op or condo. X/SaraEisen

President Trump on Tuesday blasted NYC Mayor Zohran Mamdani’s troubled pied-à-terre tax on luxury second homes as “pure Amateur Hour” that will “RUIN” the Big Apple. BONNIE CASH/POOL/EPA/Shutterstock

“I am looking to see if the Federal Government has any legal right to avert this disaster, before it is too late, for the millions of people who cherish New York and want to see it thrive, as opposed to becoming a filthy, crime ridden, decrepit place of mockery and scorn,” he wrote.

“This dangerous political ‘experiment’ in New York will destroy what was once a great City and State. It is pure Amateur Hour, and it’s hard, as President of the United States of America, to sit back and watch it happen, especially to a place I once loved,” the characteristically bombastic post read.

The post came a day after a Staten Island judge temporarily halted Mayor Zohran Mamdani’s rollout of the surcharge over a lawsuit claiming the city was bungling it and unfairly burdening homeowners.

The Post’s cover on the lawsuit over Mamdani’s pied-à-terre tax.

Mamdani’s administration filed an appeal of the temporary restraining order, meaning the tax remains in effect pending a hearing with a higher court, to be set at a later date.

The tax, approved by state lawmakers and Gov. Kathy Hochul, takes aim at owners of luxury second homes in New York City worth $5 million or more, or $1 million if a co-op or condo.

Hochul, who has championed the levy on pricey pads alongside Mamdani, shot back at the president’s comments during a press conference on the Lower East Side touting summer food assistance for low-income city kids.

Gov. Kathy Hochul speaking at a press conference on the Lower East Side on Aug. 11, 2026. Matt Roberts/Shutterstock

“New Yorkers are feeling the squeeze of all of his policies,” the Democratic incumbent, who is seeking a second, four-year term in November, told reporters when asked about Trump’s post, arguing that grocery prices have increased as a result of his tariff policy.

“It’s about paying your fair share,” she claimed. “Donald Trump ought to focus on all the pain he’s causing New Yorkers and knock it off, and don’t worry about us.”