Commerce Tower January 10, 2018 0 Facebook Twitter Google+ Pinterest WhatsApp The 30-story Commerce Tower was downtown's largest building when it opened in 1965. 911 Main St. | 355 apartments, 100,000 square feet commercial space | Cost: $139 million | Opened Fall 2017 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window)MoreClick to print (Opens in new window)Click to email this to a friend (Opens in new window)Click to share on LinkedIn (Opens in new window)