[3] It operates on most holidays (the exceptions being Good Friday, Easter Sunday and Christmas Day), making it the only shopping mall in the city and one of the few in the Greater Toronto Area that does so.

Some stores such as Ashbrook's and Mark & Spencer's were closed in the late 1990s order to make way for the Cityside expansion, which was completed in the early 2000s.

[citation needed] During January 2011, Target acquired the leases of most Zellers stores, including their location at Square One.

[citation needed] In January 2013, Square One started a major renovation on the main corridor from the Target store to the centre court/food court.

[8][9] It was announced on December 6, 2013 that La Maison Simons would take over most of the space occupied by Sears, with a flagship store which opened in Spring 2016.

[11] In June 2018, Square One announced the West Expansion, which took place in the former Target location that closed in 2015.

The expansion opened between Fall 2018 and Spring 2019 and added several brands like Uniqlo and The Rec Room, as well as a 34,000 sq.