TOWER is a home for two people with antonymous preferences. It is a consideration of the definition of 'shared space'. A central concrete core condenses the second and third floors while expanding the fourth and fifth. The core hovers halfway up from the first floor to the second, the compromise, favoring openness or closedness depending on the location and orientation of the tenant. Water draining on the southern face of the core couples with cross ventilation to cool the spaces, and solar radiation in the winter heats the core homogeneously. Additionally, the core acts as both a chimney for a fire pit and a well for light. While only the footprint of the core is occupiable, it works collectively in terms of organization and performance. (02/19)