The construction of the suburban line finally began in December 1893, when the substructure work for the section Heiligenstadt-Gersthof was commissioned and started in the same month. By the end of 1894, the sections Heiligenstadt-Westbahnhof, Heiligenstadt-Hernals and Hütteldorf-Hacking-Hietzing were under construction. 1895 followed the upper Wientallinie, 1896 finally also the lower Wientallinie. The last step was the construction of the Danube Canal Line on January 13, 1898, whereby no separate date has been handed down for the connecting sheet - which was erected along with it.