One World Trade Center had their final component of the skyscraper's spire installed in 2013.
One World Trade Center . The tower 's steel structure was topped out on August 30 , 2012 . On May 10 , 2013 , the final component of the skyscraper 's spire was installed , making the building , including its spire , reach a total height of 1776 ft. Its height in feet is a deliberate reference to the year when the United States Declaration of Independence was signed .