ISARIA Wohnbau AG engages in project development for residential real estate in the greater Munich metropolitan region. It operates through the following segments: New Developments, Revitalisation, One Group, and Other. The New Developments segment involves the acquisition, purchase, and clearing of land, as well as planning and development of projects including construction and sale of apartments. The Revitalisation segment covers acquisition of existing properties, subsequent planning and realization, and, in some cases, expansion as well as breaking up and selling the apartments. The One Group segment refers to the business activities of the One Group sub-group. The Other segment mostly includes rental income from real estate. The company was founded by Josef L. Kastenberger in 1995 and is headquartered in Munich, Germany.