"The fundamental approach to the design is two-fold – a minimalist tower that achieves an appropriate presence, quiet but with dignity, becoming a tribute to the Memorial, and a podium that becomes a catalyst in activating and enlivening the immediate urban environment as part of the revitalization of downtown New York."
- Fumihiko Maki, Tower 4 Architect

Tower 4

Tower 4, also known by its street address, 150 Greenwich Street, will face directly onto the World Trade Center (WTC) Memorial Park from the west. Rising 975 feet, it will be the fourth-tallest skyscraper on the WTC site. Designed by Maki and Associates, the 64-story tower is intended to assume a quiet but dignified presence at the site while also serving to enliven the immediate urban environment as part of the redevelopment efforts of downtown New York.

The building's first five floors will house retail space, and the remaining 56 floors will be filled with offices, totalling 2.3 million rentable square feet. The Port Authority of New York and New Jersey and the City of New York will occupy two-thirds of the office space, and Silverstein Properties will retain the rest for commercial tenants.

The retail portion of the building will make up its "podium," consisting of a ground floor level, three levels above grade, and two levels below grade. The tower also will provide primary access from Wall Street to the below-grade transportation and retail concourse, which will connect to the central PATH terminal.

The tower portion of the building will accommodate office spaces in two distinctly shaped floor plates. The lower- and mid-rise sections, floors 7 through 46, will feature a typical floor plate size of 44,000 rentable square feet in the shape of a parallelogram echoing the configuration of the site. These floors will be served by two elevator banks, each equipped with eight cars and one elevator bank with six cars. The high-rise section of the tower, from floors 48 to 63, will feature a trapezoidal floor plate measuring 34,000 rentable square feet. The trapezoid will be shaped and fluted to open toward the tip of Manhattan and triangulated from the lower floors to face the Freedom Tower. These floors will be served by two elevator banks, each with six cars. Both office floor plans contain a central core with a 45-foot span on the west side facing the memorial, as well as on the north and south. The east side has a 35-foot span.

Building Systems

The building will feature many structural enhancements, including a reinforced concrete core and columns with steel girders and beams. Safety systems will be designed to exceed New York City building code and Port Authority of New York and New Jersey requirements. Designed in accordance with the highest energy efficiency standards, 150 Greenwich Street will seek to achieve the Gold standard under the Leadership in Energy and Environmental Design (LEED) by the U.S. Green Building Council.