Casa Marcelle is located in Tamarindo, Guanacaste, Costa Rica, within a tropical environment offering views of the Pacific Ocean and a warm climate divided between dry and rainy seasons. Designed on a steep 12.5-meter slope, the residence makes the most of the topography by using stilts, minimizing impact on the natural soil and respecting the existing vegetation. The architectural design seeks harmonious integration with the surroundings, promoting passive cross ventilation, domes, and pergolas to reduce solar exposure. With a reinforced concrete structure, the interior and exterior spaces are carefully oriented to maximize views and thermal comfort, achieving a balance between functionality and aesthetics. The house, distributed over three levels, includes social areas, private rooms, and a mechanical room, with terraces and balconies that enhance the connection to nature. The material palette—stucco in sand tones, warm wood, and stone elements—creates an atmosphere that reflects modernity and respect for the environment. In addition, Casa Marcelle incorporates sustainable strategies such as solar panels, rainwater harvesting systems, and wetlands for wastewater treatment. These measures ensure energy efficiency and a reduced environmental impact, highlighting a strong commitment to sustainability. This project exemplifies contemporary architecture, sensitive to the tropical context, offering comfort, aesthetics, and respectful integration with the natural landscape.