This study aims to identify the architectural factors that strengthen students' sense of belonging to primary groups and to examine the influence of demographic characteristics in this process. Based on a review of the literature, five key dimensions were identified as foundational to the sense of belonging to primary groups: rootedness, appropriation, regeneration, at-easiness, and warmth. To explore the architectural components associated with these dimensions, data were first collected qualitatively through interviews and observations, and then quantitatively validated using a researcher-developed questionnaire administered in five universities in Isfahan Province. The results suggest that the design of student-centered spaces should include: (1) defining spaces as physical centers for students' daily departure and return, (2) allowing students to feel a sense of possession and control, with the option of privacy when needed, (3) providing opportunities for relaxation and detachment from core academic activities, while accommodating individuals with diverse personality traits, (4) ensuring students have freedom of movement and environmental comfort, and (5) welcoming students with various personality types, fostering familiarity with both the space and the people through time spent there. The study also found that demographic characteristics significantly influence students' needs in university spaces.