This study presents an assessment of the health conditions of residential allotment in El-Eulma city, Algeria, using a case study framework. Its aim is to identify the indicators affecting human physiological comfort in the environment of residential housing. The study was carried out in two phases The first phase was conducted on site, revealing that the residential allotment underwent both horizontal and vertical densification, horizontally, nearly half of the initial plots were subdivided into smaller parcels, vertically, building heights were increased, furthermore, the strictly residential function was transformed into a mixed function, incorporating commercial spaces on most ground floors. The second phase involved a simulation generated by the ArcGis10.4 software assess the health conditions on three levels: the first level included a multicriteria analysis, which made it possible to identify adverse health conditions of the building; the second level involved a shading tool, which allowed to detect the zones with external adverse influence on health conditions, and finally, the third level was the evaluation of affected buildings based on four indicators: division, building height, commercial function, degree of change, with the shading indicator supported by the hierarchical analysis process. Finally, the paper concluded that the method and tools employed to address the issue of health conditions can be regarded as preliminary and diagnostic, specifically dedicated to examining the condition of residential allotment, such as the case study.