Istanbul, progressing rapidly in the way of being a global city has a different socio cultural and physical structure which has been shaped by different life styles and requirements just as rapidly. It keeps in stock different socio cultural formation bringing-along physical structures amounting from squatters in slum areas to ramshackle buildings in ghettos, from cooperatives in the suburbs to mass housing surroundings of the city, from apartments alongside of luxurious avenues to five star residence towers in the city-center, from luxurious villas inside and outside of the city to waterside mansion in Bosporus and Prince Islands. Physical development of the city and existing housing stock cannot adjust to evolution of the social structure in the city despite of this diversification in Istanbul. The aim of this paper is to discuss and reevaluate the tends of the rapid alteration in Social Life of Istanbul since 1990, the multifarious typologies of life style (or family) emerging as a result of this alteration and requirements of diverse housing typologies in this changing life styles. The first step of the method in this study is to assign housing typologies and their numbers, extraordinary groups, their life styles and concomitant their population via by way of statistical data and literature and to compare the two kinds of data. Second step is to determine and classify the needs of extraordinary groups appertaining to housing through literature and researches about it. In the last and third step, existing housing stock is to aim adapting and revising according to the needs by means of the first two steps and suggesting the new housing typologies. Family type, which will be dealt-with in this paper, consists of extraordinary groups or togetherness called single-family appearing as the needs of modern life style in the modern societies latterly, excepting core or extended family in traditional sense. Seniors (managers), students and single academic staff, widowed people (with or without child) and elderly people constitute the widest part of these extraordinary groups, which has arisen in Istanbul during last two decade. On the other hand, Istanbul, which has rapidly gained the population since 1950, has obtained the glut of the mass housing since 1980’s. Until the end of 1990’s housing production of the city has appeared as three roomed housing typology on the average. These houses, building in the formal housing market commonly, have been supplied to core family in the upper and upper-middle income groups. In Istanbul being Metropolitan City Municipality in 1985, an unlike housing typology and needs belonging to different and peculiar requirements for people in the assorted groups mentioned above have begun to occur frequently recently. Hence defining and classification of persons and groups having different social life style, and determining and matching of the needs of these classes and researching flexible, transformative compatible solution proposals for these needs considerably contribute to housing planning of Istanbul for today and for the future.