Housing Services administers undergraduate housing. It is based at 125 Wallach.
Columbia has 17 undergraduate residence halls in an area bounded by Riverside Drive, Morningside Drive, 113th St, and 119th St. The residence halls accommodate 5,200 beds. First-year students usually live in one of the residence halls situated around South Lawn: Hartley, Wallach, John Jay, Furnald, or Carman. Upperclass students may also live in Hartley and Wallach, which are collectively part of the Living and Learning Center (LLC), through a highly selective application process. Other upperclassmen participate in a housing lottery. Rising sophomores may also live in Furnald Hall if their lottery numbers are good enough. The other upperclassmen students can choose, in order of class seniority and a random lottery number, among Broadway, East Campus, 47 Claremont, Hogan, McBain, River, Ruggles, Schapiro, 600 W 113th St, Watt, Wien, and Woodbridge. The best housing options, usually only available to seniors, are considered to be a townhouse in East Campus or a suite in Hogan. Seniors with the very best lottery numbers can get their own studio apartment in Watt.
= List of residence halls
Rising sophomores, rising juniors, and rising seniors select their rooms in the annual Room Selection process, also known as the Housing Lottery. In deciding where to live, you should consider housing factors, and also housing strategies that may help you in the room selection process.