Current research on tactical urbanism suggests that temporary buildings in vacant spaces has given rise to more successful areas and reinvigorated sites for permanent buildings. Tactical urbanism raises three fundamental problems: risks, onsite design, and externalities. This research paper addresses these problems. Specifically, the study focuses on Quartyard in San Diego, California and relies on interviews, participant observation, and reviewing policies. The research will contribute to the literature on tactical urbanism, but it will also be shared with private developers and city officials in the hope of temporary buildings will be used more frequently to revitalize abandoned spaces.