To develop health, it is necessary to pay attention to different dimensions of social settings, abilities, and affordance. Behavioral bathhouses compared to the modern day bathrooms are different regarding meanings, function, and properties. The research method in this paper is qualitative using the Grounded Theory methodology. The aim of this paper is to investigate the relationship between the mental health of users and the geometric features (shape & form) of Iranian bathhouses. In conclusion, the research finding revealed that the geometric features of traditional bathhouse of Iran made the different dimensions of mental health.