Groupon isn't leaving its Chicago HQ in the near future. The online daily deal pioneer is in the process of renewing its lease on its River North offices at 600 W Chicago Ave that'll include expanding its office size and overall footprint in the eight-story building. Plans call for Groupon's office space to grow to 380k SF and its overall footprint, including affiliated ventures, to 450k SF. Building owner Equity Commonwealth also plans to upgrade the building's lobby and elevators, build a rooftop deck with views of downtown and add more food options in the retail area, reports Crain's. The building, a former Montgomery Ward mail order warehouse, was one of the first buildings outside of downtown repurposed for creative office space and helped spark the current office development in River North, River West and Goose Island. [Crain's]