It is imperative to integrate nature into urban environments. Well-being, community, environmental stewardship, and the stimulation of the local economy are direct results of green spaces in cities. Nevertheless, the lack of availability, accessibility, and quality of green spaces adversely affect the ability for communities to thrive. This paper explored the potential transformation of a variety of vacant lots into community-led green spaces in three zip codes serviced by the Overbrook Environment Education Center in Philadelphia: 19131, 19139, and 19151. These zip codes were within the bounds of the neighborhoods of Overbrook, Carroll Park, and Haddington, which was the study area of this paper. Tools such as Rhino/Grasshopper (Urbano) for mobility studies and ArcGIS Pro for geographic data analyses were used to identify suitable vacant lots to improve the availability, accessibility, and quality of green spaces based on 5-minute walkability model. One vacant lot was selected based on a numerical scoring system and numerous assessment matrices to be further evaluated. The selected vacant lot 01 underwent multiple environmental analyses using ENVI-met, a microclimate simulation program that was employed to simulate different design strategies and design proposals. This phase assessed environmental parameters such as air temperature, mean radiant temperature, reflected radiation, relative humidity, wind speed and biometeorology such as skin temperature. By leveraging these different tools, the transformation of a selected vacant lot was realized from an idea to a concept, to a finely optimized creation. This paper strived to identify a suitable vacant lot to transform into a green space, assessed the ecological and human impact of a proposed transformation, and guided the optimization of the design. This comprehensive methodology can serve as a model to address urban green space inequities and the optimization of green spaces in cities. This paper does not directly collaborate with a community but proposes a framework of collaboration between designers and communities.