The convenience of using outdoor space directly affects the quality of life and subjective well-being of elderly individuals. This paper studies the availability of outdoor space in the context of aging. By taking the existing community in Chengdu as a case study, the differences between outdoor spaces were compared and analyzed from the perspectives of integration, intelligibility, and availability. The study found that a high-density and relatively regular road network structure has higher overall integration, accessibility, and intelligibility; accessibility and availability are not positively correlated and are also closely related to green space and public service facilities; the availability of the existing community in Chengdu varies greatly.