What does it take to generate reliable data in places where official records do not exist?
Collecting Community-Based Data in Informal Urbanism is a research project exploring diverse methods for generating reliable and meaningful data about informal settlements and translating that knowledge into community-driven interventions. Through a multi-year case study in Lomas del Centinela, Mexico, the project combines participatory approaches, surveys, structured interviews, spatial analysis, sensing technologies, remote sensing, and visual documentation to better understand everyday infrastructure, resource use, and community practices. These data collection methods informed the co-design and implementation of practical interventions, including renewable energy solutions, food production systems, water monitoring technologies, and community safety mapping. The work demonstrates how flexible, context-sensitive research can both deepen understanding and support inclusive, locally grounded urban transformation.