City of Nezahualcóyotl: Self-built cityThe peripheral community of the City of Nezahualcóyotl (“Neza”), the largest unplanned community in Mexico, becomes the paradigm of informal development. Since its inception in the 1950s, the city-suburb has grown in only 40 years into a 4,000ha city with some 1.5 million inhabitants. Numerous economic, political and environmental factors have contributed to this exponential growth. Its development is closely related to the drainage operations of Lake Texcoco in the Mexico City Valley. Neza developed both through illegal land subdivisions and sales by developers defaulting on the provision of service. It began as an informal settlement; the area was developed prior to the provision of city services. The architecture and urban space in Neza have no fixed image: they are constantly evolving. Neza has become a fully mature city with a level of social interaction, plurality, and spatial complexity to which other “planned” communities can only aspire. Despite its deficiencies, this settlement has developed a distinct and often successful urbanity. The banal, vulgar, generic, and sometimes mediocre qualities of the built environment are overcome through creative transgressions and subversions that take place every day.