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Today, urban livability is the key concept in urban planning. At present, the concept of sustainable development and livability is one of the new concepts in developed countries. The city of Bojnourd has witnessed unequal urban spaces due to the increasing population growth, especially in the last three decades, so the necessity and importance of the issue of livability is quite evident in the city today. This study was developed with the aim of evaluating and measuring urban viability and the factors affecting it. The present study is applied in terms of purpose and descriptive-analytical in terms of method. In order to collect the required data and information, library and field methods and questionnaire tools were used. The statistical population of the study consists of citizens living in Bojnourd, the sample size was estimated 384 people using Cochranchr('39')s formula. In order to achieve the objectives of the study, one-sample t-test and linear regression were used in SPSS software. The results of this study showed that the situation of urban livability in Bojnourd, according to the general average obtained, which was equal to 2.75, is in a situation below the average. Also, in terms of the studied dimensions, the social dimension with an average of 2.84 has the highest average and the environmental dimension with an average of 2.67 has the lowest average. Also, the results of this study show that the situation in Region 2 is better than in Region 1 of Bojnourd. Other findings of this study include the positive effect of citizenschr('39') sense of security and health on urban livability.

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The city is a vibrant and dynamic creature whose body is shaped at different times by natural and social economic, political, cultural and economic developments. In a sound and healthy fashion, these developments are such that the old elements of the cities are restored to meet the new needs. In the structure and even in the destruction of these tissues. The purpose of this study was to investigate the feasibility of creating new functions in ancient urban context. The present study is of applied purpose and of descriptive-analytical method. The statistical population of the study was comprised of experts in the field of research and the sample size was 30 persons. The results of the implementation of the Suara model showed that among the indicators identified for the social dimension, the role of owner-investor participation index with a final score of 0.224 was ranked first, for the economic dimension, the index of participation in purchase and construction and Builder in the range with a final score of 0.306 in the first rank, for the physical dimension Paying attention to meet the current needs for physical and functional change with a score of 0.416 in the first rank, and for the environmental dimension Indicator Role of New Construction in the Area Infrastructure With a score of 0.610, it is the highest.