Formally divided into lower and upper Ullern in 1740, both farms were bought by Herman Severin Løvenskiold, in 1878 and 1866 respectively.

In 1942, a connection between the two lines, between Jar and Sørbyhaugen, was opened, providing public rail transportation to the northern part of Ullern.

In the post-World War II period, the villa-dominated housing was supplemented by tower blocks, scattered across the borough.

The stations within the borough are Øraker, Lilleaker, Sollerud, Furulund, Bestum, Ullern, Abbediengen, Hoff and Skøyen (Oslo Tramway); Bjørnsletta, Åsjordet, Ullernåsen and Montebello (Oslo T-bane); and Skøyen (Drammen Line).

The Ring 3 starts at Lysaker, crosses the Oslo-Bærum border in the southern Granfoss Tunnel, emerges at Mustad before entering the northern Granfoss Tunnel, finally emerging near Ullern Church.

It passes the Radium Hospital before continuing into Vestre Aker at Smestad.

The shopping mall CC Vest is located at Lilleaker, partially utilizing the former locales of the manufacturing company O. Mustad & Son.

Until the 2000s, Norges Varemesse ran a large convention center at Skøyen.

Slightly east of the Radium Hospital is Smestad fire station, opened in 1947.

Their home field, used for football and bandy matches, is located near Lysakerelven station.

Notable players include Thorvald Moe and Jan Frode Andersen.

The 15 seats are distributed among the following political parties for the 2019-2023 term:[8] The administration is headquartered at Hoff.