Södermalm [sødərˈmalm] (or just Söder) is the southern borough of central Stockholm, consisting of the island of Södermalm proper, two smaller islands connected to it from the west (Långholmen [ˈlɔŋˈhɔlmən] and Reimersholme [rejməʂˈhɔlmə]), as well as the neighbourhood of Hammarby Sjöstad on the opposite bank of the Hammarby Sjö in the east, which is a redeveloped former industrial area that was transformed into a model sustainable residential community.