This article studies the use of natural ventilation (NV) solutions to reduce energy demand for cooling and mechanical ventilation for application in a design of an office building in Bandar Lampung office buildings with a tropical climate. Using AutoCAD and SketchUp, this method centered on designing and displaying in 3D. The design emphasized reducing the mechanical ventilation system to simplify and enhance the green space of the natural environment. Standard floor heights are not uniform using this method. The height of the employee workstations is 3.50 meters, while the height of the transitional floor is 7 meters. The orientation of the building's floor openings is intended to limit excessive sunlight so that cross ventilation can occur through the building's two large openings—a strategy for natural ventilation on one of the floors containing public spaces. In order to optimize air circulation and reduce the need for air conditioning, the standard floor height of a building has been altered. In addition to utilizing natural ventilation, this office building also employs building envelope features and a Biophilic system to limit heat transfer so that building occupants do not experience excessive heat during the day, even in the absence of an air conditioning system. Artificial wood and water features were used to give the exterior of the building a natural appearance.