OS House is a minimalist residence located in Valencia, Spain, designed by Carlos Segarra Arquitectos. The first steps to begin this project started from the strict decision of dividing the space with the greatest possible symmetry. The designers achieved this by placing the staircase as the organizational core of the space.. This decision allowed the architects to generate a visual connection between the different rooms, which are clearly defined within their space. Natural light has been the main element that marked the second phase of the project. The architects wanted to blur the boundaries between the interior and exterior spaces with the arrangement of terraces and outdoor spaces.