McCownGordon Construction headquarters January 10, 2018 0 Facebook Twitter Google+ Pinterest WhatsApp McCownGordon plans to spend $10.5 million to renovate 850 Main for its new headquarters. (Rendering by Helix) 850 Main St. | 45,000 square feet office space | Cost: $10.5 million | Architect: Helix Architecture + Design | General Contractor: McCownGordon Construction | Completion: 2018 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)MoreClick to share on Reddit (Opens in new window)Click to print (Opens in new window)Click to email a link to a friend (Opens in new window)