William Lyon Homes, Inc. engages in the design, construction, and sale of single family detached and attached homes. It operates through the following geographical segments: California, Arizona, Nevada, Colorado, Washington, and Oregon. The California segment consists of operations in Orange, Los Angeles, San Diego, Riverside, San Bernardino, Alameda, Contra Costa, and San Joaquin counties. The Arizona segment operates in Phoenix metropolitan area. The Nevada segment includes the operations in Clark and Nye counties. The Colorado segment comprises of the operations in Douglas, Grand, Jefferson, and Larimer counties. The Washington Segment constitutes of the operations in King, Snohomish, and Pierce counties. The Oregon Segment composes of operations in Clackamas and Washington counties. The company was founded in 1954 and is headquartered in Newport Beach, CA.