The Seestern 3 office building was designed for the Horten Group in 1961 by renowned Düsseldorf architect Helmut Rhode. At the time, it was the first building in Germany to be designed purely for open-plan office use. After extensive repositioning by Union Investment, the LEED Gold certified property is again one of the most prestigious and stylish office properties in the Düsseldorf area. The 11,500 sq m grounds belonging to the property have also been revamped to create an attractive area for tenants to use in addition to the office space.

The Seestern 3 office building is located in the Niederkassel district of Düsseldorf, on the left bank of the Rhine. It enjoys excellent transport links, with the A52 motorway and Kaarst motorway intersection being within easy reach, as is Düsseldorf city centre. After extensive repositioning by Union Investment, Seestern has been given a new lease of life.