Construction has begun on a mixed use development on the Metrorail’s Silver Line less than a mile from Washington Dulles International Airport. The developer of the Hub, as it is called, is a joint venture between Chicago-based Origami Capital Partners and an affiliate of Westport, CT-based Greenfield Partners. The project is approved for 1,265 multifamily residential units, 400,000 square feet of retail space, 3.5 million square feet of office space, and 350 hotel rooms. A central promenade will serve as the focal point of the project’s retail component offering outdoor recreation, retail, and entertainment space. The facility will also feature up to a dozen full-service restaurants with an outdoor plaza and water features.