Northern Arizona University built Women's High Rise dorm in 1968 for $2.3 million. Originally, this building served as an all-female dormitory. The building went through a series of name changes during planning and construction, including Dorm L and High Rise #2. In 1980, NAU renamed the building West High Rise Dorm. It is seven stories tall and houses 544 students. Currently, it is co-ed and hosts the Freshman Connection Program. The building also contains an exercise room, in-hall tutoring, and a 24-hour computer lab.
In 1987, the Arizona Board of Regents (ABOR) renamed the building Reilly Hall in honor of William P. Reilly. He served as a member of ABOR and was the former president of Arizona Public Service Company.