After the Second World War, the municipality bought large areas in Aker municipality, which was combined into Oslo in 1948, and began building large numbers of apartments in what is now called the outer east.
Efter andra världskriget köpte kommunen stora områden i Aker kommun (som slogs samman med Oslo 1948), och satte i gång bostadsbyggande i stor omfattning i det som i dag kallas yttre öst.