As part of the international project City, Identity and Sustainability, a study was done in two popular neighborghoods of Guadalajara (México). One of them traditional and well consolidated (Analco) and the other, a new one and in the process of consolidation (Los Colorines). An adapted survey was applied for evaluating identity, sustainability and demographic data. When compared, it was evident, that the relation between greater or lesser consolidation, and practices of sustainability, is mediated mainly by factors of identity and colective satisfaction with the place.