Dozens of construction workers are quickly laying steel rebar and concrete for the foundations and lower floors of 1 Willoughby Square in Downtown Brooklyn. Located at 420 Albee Square, the 34-story, 495-foot-tall, 500,000 square foot Class-A office tower is being developed by JEMB and designed by FXCollaborative. It broke ground in February, and sits directly across the street from the City Point residential and retail complex to the west.