Sangji Construction, Inc. engages in real estate development. Its brands include Ritzvil, Caelum, and Caelus. It operates through the following divisions: Sales Construction, Contract Work, and Others. The Sales Construction division deals with real estate development, housing construction, and land development businesses. The Contract Work division includes engineering work, along with electrical, information and communication, and specialized firefighting facility construction. The Others division covers real estate-related services. The company was founded on June 21, 1979 and is headquartered in Seoul, South Korea.