A 30-foot chunk of facade tumbled from a Tribeca high-rise across the street from the Department of Buildings headquarters on Monday, slowing morning commutes.

The rubble fell from 291 Broadway, a 19-story building undergoing facade repairs and surrounded by scaffolding and netting. No one was injured.

A buildings department spokesperson said decorative stone had fallen from between the 15th and 16th floors.

The debris appeared to have cut open holes in the netting and knocked off a part of a wooden awning atop the scaffolding. It landed in a crosswalk and bike lane on Reade St.

Building department records show the site was hit with a violation of the buildings code on March 11 for failure to secure the netting surrounding the building.

Department of Buildings officials at the site of the construction accident.

“Major concern for falling objects construction debris, material creating possible hazard situation,” the violation reads.

A spokesperson for the buildings department confirmed the violation remains open.

Buildings Commissioner Ahmed Tigani was among the many officials on the scene.

“We're getting good cooperation from the building's hired professionals,” he said.

Buildings department headquarters is at 280 Broadway, just across the street from the job site.

This article has been updated with additional info from the Department of Buildings.