Jan Beermann

Oikos Group GmbH is one of the largest prefabricated house manufacturers in Germany. The company is based in Schluechtern, Germany, and has subsidiaries in Germany. The German company focuses on sustainable, modern, and high-quality construction. Oikos Group values building in a community with shared values. The CEOs of the company are Marco Hammer, Christian Garke, Marcus D'Agostino.

Oikos Holding GmbH is a German company that specializes in prefabricated houses. The company is based in Schluechtern, Germany, and has subsidiaries in Germany. The private company offers intelligent overall systems that save money and nerves. The company combines the expertise of three brands in prefabricated construction and strategic partnerships. Oikos Holding invests in the OIKOS-Gruppe and aims to fulfill people's dreams of owning a home. The company provides professional and personal service with a focus on sustainability. Oikos Holding was founded in 2018, and the CEO is Marco Hammer.

Bien-Zenker Holding GmbH provides business and economic services. The private company is based in Schlüchtern, Germany. The CEOs of the German company are Marco Hammer, Christian Garke.

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.