This paper attempts to identify the effective managerial factors in renovating old building tissues in a city in Iran (Langrud). The present research is practical in terms of purpose, and it is descriptive and contextual in terms of data collection. Furthermore, since this is a mixed research study from both the perspective of its nature and purpose, we conducted the study with both qualitative (interviews) and quantitative (questionnaires) methods. As the statistical population in the qualitative section consists of experts on improving worn-out tissues, we used an available sampling method and took into account the individuals’ characteristics in the sampling process. Seven managers, assistants, and engineers with more work experience than the rest of the managers and assistants were selected. During the quantitative phase, the population included all the municipality staff and the engineering system organization of Langrod city, which contains a total of 650 people. A total of 335 people were selected, and the questionnaire was distributed using Cochran’s formula. A semi-structured interview and a questionnaire were used as research tools distributed among participants. The validity and reliability of the questionnaires were determined based on existing standards. Additionally, the data were analyzed using Factor Analysis (FA), the Fuzzy Analytic Hierarchy Process (FAHP), and Structural Equations Modeling. According to the results, the most effective managerial factors and indicators in the improvement and renovation of the city's old tissues were related to resources. Next, attention to training, commitment to environmental assessment, idea creation, planning, management, technical factors, experience, attention to legal requirements, and attention to external factors are placed.