A construction worker fell to his death from a Brooklyn Heights building Wednesday morning, authorities said.

The 23-year-old was working on the roof of a building on Pierrepont Street near Columbia Heights shortly after 10 a.m. when he somehow lost his footing and plummeted 12 stories, cops said.

A woman called 911 after finding the victim in the rear of the building.

The victim, whose name was not immediately provided, was pronounced dead at the scene.