Lübke Kelber AG engages in the acquisition, sale, leasing, and management of residential properties. It operates through the Acquisition and Operation of Residential Portfolios and Geothermal Social Housing segments. The Acquisition and Operation of Residential Portfolios segment specializes in the energy-efficient renovation of housing and residential spaces. The Geothermal Social Housing segment focuses on operating the cost optimization for social housing constructions. The company was founded in 2013 and is headquartered in Frankfurt, Germany.