The project's estimated cost was $900 million.[5] The windfarm is sited in water depths of 21–31 metres (69–102 ft).[4] The turbines were kept warm and healthy with diesel generators for 6 months before onshore cabling was fixed.[6] The farm sent first power to shore in December 2014.[7]
Initially the project was developed by Geo Gesellschaft für Energie und Ökologie. The project was purchased by Vattenfall in 2007. In 2010, Vattenfall sold 49% stake in the project to Stadtwerke München.[4][8]
The SylWin transformer platform connects the power from DanTysk, Butendiek and Sandbank offshore wind farm to shore.[9] A DKK 375 million accommodation platform for 50 people is being built to service both DanTysk and Sandbank, inspired by Poseidon at Horns Rev 2.[10][11]