4 WTC is expected to start taking tenants in 2015.
One World Trade Center is the marquee skyscraper at ground zero in lower Manhattan. But the first office tower to officially open there will be its shorter neighbor, 4 World Trade Center.
The ribbon-cutting will be next Wednesday for 4 World Trade. The 978-foot building was designed by prize-winning architect Fumihiko Maki.
The building is on the southeast corner of the trade center site. It faces the Sept. 11 memorial's south reflecting pool.
The Port Authority of New York and New Jersey expects to move into 4 World Trade in early 2015.
Next week's official opening means that the authority can start building out the office space on the floors it is leasing.
The Port Authority lost its home in the twin towers during the 2001 terror attacks.