A judge has halted a plan by Mayor Michael Bloomberg's administration to rezone an 18-acre site in Brooklyn known as the Broadway Triangle.
Wednesday's preliminary injunction came in response to a lawsuit filed in state Supreme Court in Manhattan.
A judge said the city cannot move forward with the plan until a hearing in March.
The plan seeks to develop a portion of forlorn land situated between Williamsburg, Bushwick and Bedford-Stuyvesant.
A group of opponents complains that the rezoning process has been too secretive.
The proposal calls for 1,800 new housing units, and 44 percent are "income-targeted" affordable housing. That means they are for low-income and moderate-income families.