Professor Hubbard teaches architectural history courses, focusing on American, Japanese, and Italian Renaissance architecture. In addition, she teaches a course on law and professional practice for architects, drawing on her experience as a management consultant to Chicago-area architectural firms.

Professor Hubbard established the historic preservation certificate program in the M.Arch curriculum in 1992, and served as the program director until 2002. She has worked as a preservation consultant to several municipalities, the United States Forest Service, the Department of Veterans Affairs, the Wisconsin Historical Society, and the Wisconsin Department of Transportation.

Her current research focus is the exportation of American reinforced concrete construction techniques to Japan in the 1920s, and the role of American construction companies in the development of modern Japanese architecture. In addition, she continues to study the architectural and social history of the American poorhouse, the cultural meaning of Civil War military cemeteries, the structural form of Luxembourger stone farmhouses in southeastern Wisconsin, and the standardized design of Depression Era park and conservation facilities