The sky-high property-tax hike will be a big “negative” for the city, Donald Trump warned yesterday.

The owner of such glitzy properties as Trump Tower, the former General Motors Building and Trump World Tower said he is worried the double-digit increase is “overkill” that will hurt the city when employers seek cheaper quarters elsewhere.

“It’s a very negative thing for the city, and it’s a shame that it had to be increased by such a tremendous margin,” Trump said.

The megadeveloper said that at the end of their leases, commercial tenants – facing a hike in their leases – “could say, ‘Maybe we’ll move out of New York.’ “

The Donald added, “It’s certainly going to hurt the city.”

Trump is already suing the city for allowing corrupt tax assessors to unfairly jack up the values on his Trump World Tower condo units in order to offset lowered assessments for buildings where bribes were paid.

“Everyone asked why the taxes were so much higher than the other buildings,” Trump said.

Robert Nelson, who owns and manages about 1,000 rental units, is worried that the combination of higher real-estate taxes, insurance, water and oil costs will cause the Rent Guidelines Board to increase stabilized rents.

“At the end of the day, every New Yorker will be affected,” Nelson said.