This article explains the genesis, effects of different factors (historical, economic, political- strategic, urban planning ones), and dynamics of spatial-social differentiation of the employed population in Belgrade. Special attention is paid to analysis of recent migration of employees during the period 1991-2002, which corresponds to the initial phase of liberalization of the housing market when financial constraints and subjective preferences of families and households started to act. This analysis represents the basis for scientific forecast of trajectories of socio-residential development of the city. [Projekat Ministarstva nauke Republike Srbije, br. 176017]