When they were integrated into the city of Vienna in 1892 together with Unterdöbling, Oberdöbling, Heiligenstadt, Nußdorf, Grinzing, Josefsdorf and Kahlenbergerdorf, Obersievering had 626 inhabitants and Untersievering 1,996. Obersievering consisted of 78 houses, Untersievering 214. Around 1900, large apartment blocks were thrown up in the lower Sieveringer Straße, and the surrounding hills were gradually built over. The old centres of Obersievering and Untersievering are nonetheless still recognisable. Tram line 39, which used to run to Sievering, was opened in 1902.
