Global city theories and urban policy frameworks often conceptualize city-making through the lenses of economic competitiveness, elite-driven strategies, and formal governance, and sideline the contributions of the urban poor. This chapter challenges such perspectives by integrating insurgent citizenship theory with the concept of the urban mosaic to highlight the active role of grassroots initiatives in shaping urban space. Through a case study of Kampung Marlina’s housing cooperative in North Jakarta, alongside a complementary case of Kampung Keranggan’s ecotourism in South Tangerang, we explore how residents navigate the tensions between informality and formal institutions to secure resources and legitimacy. These insurgent citizenship practices not only resist exclusion but also build networks with external actors, creating their own pathways to inclusivity. We conceptualize these practices as interconnected “tiles” within a broader mosaic of insurgency, demonstrating how seemingly localized struggles form part of a larger, networked urban phenomenon. Collectively, these decentralized, incremental, and networked spatial practices offer a viable alternative to the dominant, profit-driven models of urban development. This chapter calls for a reevaluation of global city formation in Indonesia, one that acknowledges the strategies of the urban poor and encourages deeper theorization of the spatial dimensions of insurgent practices. By foregrounding community-driven spatial practices, this chapter shows how the inclusive social development paradigm discussed in this volume can be practically implemented in everyday urban life.