Taipei 101’s main construction phase ran from 1999 to 2004, and the tower officially opened on 31 December 2004.

Quick Scoop

  • Groundwork and early site preparation started in the late 1990s, with sources noting a groundbreaking around 1998.
  • Full tower construction is generally cited as beginning in 1999 under the design of C.Y. Lee & Partners.
  • The structure was topped out in 2003, when the main frame and roof were completed.
  • Construction was completed in 2004 , and Taipei 101 opened to the public at the end of that year, becoming the world’s tallest building at the time.

So if you’re asking “when was Taipei 101 built,” the concise answer is: it was built between 1999 and 2004, with its official opening on 31 December 2004.

A simple way to remember it: think of “101” as a kind of skyscraper course that ran from ’99 to ’04, graduating with a New Year’s Eve opening in 2004.

TL;DR: Built roughly 1999–2004, officially opened 31 December 2004.

Information gathered from public forums or data available on the internet and portrayed here.