Unlike many other urban universities, Columbia has a residential campus. Nine out of ten undergraduates live in campus residence halls; 70 percent of those students have private rooms. Some 99 percent of all first-year students live on campus. Housing is guaranteed for all four years at Columbia. View some dorm rooms This is Carman. Located at the corner of 114th Street and Broadway, Carman is one of two dorms exclusively reserved for College and Engineering first-year students. Like many of Columbia's dormitories, Carman has a typical New York high rise setup with thirteen floors of suites. Although the majority of its floors are coed, the suites themselves are single sex. Each suite has two rooms (approximately 180 square feet each), a bathroom and four students; therefore, living in Carman means sharing a suite with three classmates. Every floor is provided with a common area and television. The suite setup of Carman is indeed a socially conducive one, but the thick cinder block walls ensure a good night's sleep. Also important to note about Carman are the computer lab located on the ground level of the building -- an attractive feature to those students who will not be able to bring or buy a computer -- and Carman's prime location adjacent to Alfred Lerner Hall, Columbia's new, multi-million dollar student center, completed in the fall of 1999. This is John Jay, another first-year dormitory. Although there are a handful of walk-through doubles in the corners of the building, the majority of the rooms in John Jay are singles. The setup in John Jay is quite different from Carman in this respect. Rather than a suite situation, John Jay has a hall setup. The singles in John Jay average approximately 90 square feet in size, and each room has a window overlooking either campus, 114th Street or Amsterdam Avenue. Each of John Jay's sixteen floors has separate men's and women's bathrooms complete with shower facilities. Also, John Jay is home to the only undergraduate dining hall, as well as to JJ's Place, an eatery/mini-mart open until 2:00 am daily -- a convenient option for those who would rather not venture off-campus for a midnight snack or toiletries. Hartley and Wallach are the third option for first-year students. Unlike Carman and John Jay, Hartley and Wallach are not exclusively freshman dorms, but two-thirds of their suites are reserved for freshmen. Each Hartley/Wallach suite has nine singles, one double, a kitchen and a bathroom with two showers, two toilets and three sinks. Although the double is single-sex, the rest of the suite is coed, and a rather large common room within the suite gives it a "homey" feel. The singles in Hartley/Wallach are generally a bit larger than those in John Jay, and windows in these rooms overlook either campus or Amsterdam Avenue. Hartley, Wallach and John Jay are all connected, thus living in Hartley/Wallach gives a student the same access to John Jay's eateries. The East Campus residential complex is an exclusively upper-classmen housing facility. Suites and townhouses occupy this large housing facility, which is home to a significant portion of Columbia's student body. Located next to Columbia's graduate law school on 116th Street and Amsterdam, East Campus is just a step outside of Columbia's immediate campus, giving its residents a close yet private sanctuary to which they can go home at the end of the day.