Abstract : This growing appeared in the form of a spread out of the agglomération of Tunis towards the North and the West by the prolifération of the spontaneous housing. In front of such situation, the authorities decided to orientate space dynamics towards the meridian outskirts, known traditionally for their industrial activities. The new residential area of "El Mourouj" is in keeping with this context; created in the 80's it constitutes a wide-ranging opération of urbanism. Many actors of the urban development will confrontate in this territory in gestation with stratégies and lines of arguments always contradictory public powers representing the principal actor through its différent institutions and organizations has practiced along the three last décades the monopole of management and offer, construction and financing of the land. ( housing). They tried to précède to the development of an urban model which privilège the mixed quarters of housing from/the point of view social content and encouraging the vertical constructions do to avoid the " urban invasion". Thèse policies, which aim to reduce the space consumption, don't match with the household. Infàtuation who prefer individual houses and often do many transformations in their new inhabitations they purchase in order to adapt them to their daily custom and way of life. With the graduai disengagement of state from housing, the private property developers will impose themselves in the scène of built-up site and will make profit of the raising priées of and market fluctuations of real estate to realize perceptible profit margin. Through our research, we tried also to show that there is a lack of coordination among différent operators from public and private sectors, the partitioning which exist at the level of administration and the purchasing out of citizen from the management of daily afifairs of the city, explains the delay which occurred in the carrying out of basic equipment such as the case of métro line of El Mourouj and the difficultés of communal ruling in this news suburbs in recombining of the periphery of Great Tunis.