The developers of the massive Hudson Yards project on Manhattan's West Side filed a lawsuit in state court in Manhattan claiming that the building trades routinely violated the project labor agreement covering work on the project.

The allegations include no-show jobs and padded hours that cost the developer "in excess of $100 million" in additional wages, benefits and insurance costs.

The building trades say they have been trying to prevent the developer, the Related Cos., from building the project's next phase using nonunion employers. "This lawsuit is clearly in retaliation," the Building and Construction trades Council of Greater New York said in a statement.