In this paper, we examine two mixed-use redevelopment projects in the United States, including both regulatory and procedural contexts, to assess how decision-making processes affected microclimate outcomes. We investigate Belmar in Lakewood, CO and 29th Street Mall in Boulder, CO. Measurements and simulations of microclimate show that Belmar mitigates urban heat more effectively. Policies including building height, street patterns, and landscaping standards were key variables in this outcome. Through interviews and content analysis, we found five main factors shaping those policy choices: (1) urban vision, (2) land use and form controls, (3) design guidelines, (4) public financing, and (5) ownership/condemnation factors.