The present research aims to evaluate the urban renewal and rehabilitation plan for the Sirous neighborhood located in the dilapidated fabric of Tehran’s District 12. It attempts to assess this neighborhood using the phenomenon of gentrification of natives. This research is applied and practical in nature based on its objectives, and it employs a descriptive-analytical evaluation method. Information was gathered using library-documentary methods and surveys. Given the dilapidation of the Sirous fabric and the proposed reconstruction and regeneration plans, and considering that it is one of the old and central neighborhoods in Tehran, there is a necessity to evaluate the maps and indicators of gentrification in the Sirous neighborhood, which indicates a high emergence of this phenomenon. The goal is to determine how this phenomenon will grow in the near future, especially considering the activities and operations that the neighborhood will face after its reconstruction in subsequent years. The phenomenon of gentrification was first introduced in the 1980s and is still being explored, requiring more research on this subject, particularly in countries like Iran with many valuable historical fabrics and dilapidated areas to test gentrification and its counter-phases. This research, by outlining primary, secondary, and guiding indicators in the Sirous neighborhood, evaluates three items: accessibility to work centers, high architectural value, and low housing value, which received the highest affirmative responses from interviewees. A high level of gentrification and gentrification of natives is expected in this neighborhood.