A clearly urban development of Kypseli began in the 1930s with the construction of family houses and the first modern apartment buildings in Athens. The development of apartment buildings was contemporary with Kolonaki and other central neighbourhoods. Although many of the earlier houses were built in a neoclassical or eclectic style, from the 1930s onwards, the designs of newer houses and apartment buildings were influenced by international trends such as modernism, Bauhaus and Art Deco. Adjacent large green areas such as Pedion Areos and Fokionos Negri Street pushed Kypseli to become an upmarket district with many apartment buildings built until the 1960s that addressed to the middle and upper-middle class.