On August 1, 2007, BIA moved the entire school from two facilities at the University of Bridgeport into the Seaside Institute building, which serves as the headquarters for BIA and is adjacent to the university campus. That move allowed the school to expand, as student enrollment steadily increased by an average of approximately 10 % per year for each of the last five years.

Established in 1886 as a boarding school for teenage girls, the Seaside Institute was converted during the 1980s into thirty apartments plus a commercial area. BIA restored that building to its original purpose, by converting those apartments into classrooms, offices, a dormitory, and residences for teachers and staff. Renovation of the Seaside facility included construction of a science classroom with storage for chemicals, seven other classrooms, a state-of-the-art server room, two student computer labs for students, a health center, an assembly room, a student lounge, a lunch room, a records room, a conference room for faculty and staff, and a suite of five administrative offices with a reception area. The classrooms are equipped with phones, whiteboards, networked computers, printers, multi-media projectors, and SMART boards. The history and ELL classrooms have maps of the history of America and the world.

In addition, another dormitory is named "Seaview House", because it overlooks the Long Island. In 2004, BIA purchased the Seaview property and converted the structure into a state-licensed dormitory that meets all codes, laws, and ordinances.