New York

The second-tallest building on our year-end construction countdown is PENN 15, a 1,200-foot commercial supertall at 15 Penn Plaza in Midtown, Manhattan. Designed by Foster + Partners and developed by Vornado Realty Trust, the 56-story skyscraper will yield 2.7 million square feet of office space and stand as the centerpiece of the 7.4-million-square-foot Penn District master plan. Northstar Contracting Group is the demolition contractor for the property, which is located along Seventh Avenue between West 32nd and 33rd Streets.