T The design of an integrated and sustainable mixed-use development within the transit-oriented development (tod) area of gubeng station, surabaya, aims to create a modern transportation hub capable of integrating various urban functions in an effective, efficient, and environmentally friendly manner. gubeng station is one of the primary transportation nodes in surabaya with significant potential as a mobility center through the integration of railway services, mrt, lrt, and public transportation systems, as well as the development of commercial and accommodation facilities. as urban growth and mobility demands continue to increase, a design solution is required to accommodate transportation-related activities while supporting sustainable urban development.the mixed-use concept is implemented through the integration of station facilities, business hotels, transit hotels, commercial areas, and public spaces to improve land-use efficiency and support the principles of transit-oriented development. a biophilic architectural approach is adopted as the primary strategy to enhance environmental quality and user comfort through the application of the thermal and airflow variability and presence of water principles. the thermal and airflow variability principle is achieved through the optimization of natural ventilation, cross-ventilation systems, and climate-responsive building design adapted to surabaya’s tropical climate. meanwhile, the presence of water principle is incorporated through water features within public spaces and transitional areas to improve people, thermal comfort, and spatial experiences for users.this design also optimizes the use of user-friendly and sustainable materials, green open spaces, rainwater management systems, and passive design strategies to reduce building energy consumption. building mass orientation, functional zoning arrangements, and intermodal transportation connectivity are carefully designed to create an accessible, comfortable, and socially interactive environment. through this approach, the mixed-use development is expected not only to address commercial and transportation needs but also to support the future economic growth of surabaya while promoting environmental sustainability and improving users’ quality of life.