Westchester began as an agricultural area in the early 20th century. In the 1930s the area transitioned into a residential community resulting from the rapid development of the aerospace industry at LAX, known at the time as Mines Field. Today Westchester is home to some 48,000 residents. Approximately 50% of the local housing stock consists of single-family detached homes, most of which are modestly sized on small lots. Westchester is also home to a number business and commercial districts along its main arteries of Lincoln Boulevard, Sepulveda Boulevard and Manchester Avenue. Loyola Marymount University and Otis College, both well respected institutions of higher learning, are also located within the area.