Redeveloping the MacKimmie Complex was nothing short of ambitious. They removed the exterior of the 1970 tower and retrofitted it with an energy-efficient double-skinned façade, and expanded the building from 13 to 15 stories. They also replaced the adjacent MacKimmie Block building built in 1963 with a contemporary four-story hub for connection, classes, and administrative services. The four-story building is also the permanent home of the Hunter Student Commons, which includes the Innovation Sandbox and the Hunter Hub for Entrepreneurial Thinking.