Michael Belschak

Bien-Zenker GmbH is a holding company, which develops and produces prefabricated houses. The firm specializes in the design, construction, and marketing of prefabricated houses of various sizes and architectural styles. Its product portfolio encompasses single-family and two-family dwellings, multi-family houses, bungalows, row houses, apartments, duplexes, maisonettes, and townhouses. It also provides construction design, home automation, and consulting services. The company was founded by Heinrich Bien in 1906 and is headquartered in Schluechtern, Germany.

SCHWABENHAUS GmbH & Co. KG engages in the manufacture of prefabricated houses. It also offers geothermal heating, air-to-water heat pumps, as well as ventilation and photovoltaic systems. The company was founded in 1966 and is headquartered in Heringen, Germany.

HANSE HAUS GmbH & Co. KG is a holding company, which engages in the sale of pre-manufactured homes. It offers mansions, town houses, pent roof houses, cottage and regional type houses, Mediterranean-style houses, architect-designed houses, as well as single-family and semi-detached houses. The firm also offers development and planning services. The company was founded by Hermann Wandke in 1929 and is headquartered in Oberleichtersbach, Germany.