The moated castle lies on a peninsula in an exposed position between two canals: at the confluence of Wandrahmsfleet and Holländischbrookfleet. The official address is: Dienerreihe 4, 20457 Hamburg. The street Dienerreihe connects the streets Alter Wandrahm and Brooktorkai. Nearest subway stop is the Meßberg station. Since 1991, the moated castle is a listed building.
Built between 1905 and 1907 during the third phase of the Speicherstadt (1899-1912), the four-storey building is one of the most famous landmarks and oldest buildings in the historic warehouse complex.
Originally the moated castle was used as a shelter and workshop for the dockers, who carried out the maintenance and repair of the hydraulic storage winches. They were called Windenwächter or Windenwächter and had - in addition to other technical personnel - the privilege to live in the Speicherstadt.
The winches were an important component of the storage buildings: there were - and still are today - no freight elevators. All goods were drawn with winches on the outside to the facades to or from the storage floors of the store.
Nowadays the building is used commercially. On the ground floor there is a commercial space for tea trade with attached gastronomy. On the first floor, a provider of oxygen therapy is located. Because of its location and architecture, it also served as a backdrop for television productions, such as the TV series "Die Pfefferkörner".
The Wasserschlösschen also trades under the name "Außenentraustelle" of the registry office Hamburg-Mitte.