Existing middle-income housing projects are one of the elements of the built environment, which represents a source of environmental damage and resource depletion. The study aimed to activate sustainability in existing middle-income housing projects due to the cultural, social and economic level that characterizes the members of this class, which allows them to respond to the application of mechanisms for activating sustainability. To achieve this, the standards and needs of the middle class were studied. And the architectural and urban standards for middle-income, in order to identify the most important problems affecting the provision of the needs of the middle class, represented by the lack of proportionality of economic capacity with the needs of this class. Which led to the emergence of several economically  appropriate means to fulfill these needs. Among them is cooperative housing, which is the type to which the study area belongs (Saqr Quraish - Sheraton Housing). In order to find ways to activate sustainability in existing middle-income housing, ways to activate sustainability in the architectural and urban spaces of middle-income housing were studied. To determine the mechanisms for activating sustainability in existing middle-income housing projects, similar examples were analyzed and selected according to the factors for developing residential projects and activating sustainability in them. The analysis relied on the inductive and deductive method in analyzing the study samples In order to activate the mechanisms of sustainability in the study area, the study area was identified through studying the area and analyzing the architectural and urban spaces in it, to reach the extent to which the mechanisms for activating sustainability have been achieved in it, with the help of a field study of the area and a questionnaire to determine the extent of awareness of the importance of activating sustainability in the region and The possibility of residents participating in sustainability activation processes in order to determine the mechanisms that can be activated in the study area.