An NYPD inspector who oversaw the department’s construction projects died of a self-inflicted gunshot wound yesterday at a police facility in Fort Totten, Queens.

Anthony Tria, 48, joined the department 26 years ago, police sources said.

The NYPD issued few details about the tragedy.

Tria, a former Marine, began his career as a housing cop, and was among the youngest officers ever promoted to captain, a colleague said.

“Inspector Tria was a consummate professional who worked tirelessly on behalf of the Police Department and the people of New York,” Commissioner Raymond Kelly said.