Introduction Housing at first sight as a shelter is one of the basic needs of humans, but at the moment the housing covers a variety of dimensions, including economic, social, cultural and environmental, and is considered to be more than a shelter. But, at the Second United Nations Conference on Human Settlements was held in Istanbul, suitable shelter does not simply mean the presence of a roof over any person, but the proper shelter is defined as follow; the appropriate shelter means convenience, adequate space, physical access, security, property security, stability and structural durability, lightening, ventilation and heating system, primary infrastructures such as water supply, sanitation and education, waste disposal, environmental quality, accessibility to work and primary facilities which should be affordable to all of the people. From this perspective and indexes mentioned by UN-Habitat, housing today in developing countries because of domestic migration, land supply problems, lack of sufficient resources, weak economic management, lack of comprehensive housing planning and other economic failures, on the one hand, and acceleration of the urban population has, on the other hand, is one of the acute problems. In this regard, the city of Karaj, as one of the metropolises of Iran with its features such as proximity to Tehran metropolis, its riverside location and suitable weather conditions, as well as its industrial, agricultural and tourism role, has witnessed a huge increase in population in recent years, which resulted from the migration of the pendulum from Tehran to the city and the natural increase of the population. Considering the increasing population and youth population, it is important to review the housing situation in the city and provide adequate and sustainable housing for all sectors of society. Therefore, in this research, housing sustainability indices in Karaj city are studied. Also, in addition to ranking the areas in term of sustainable housing indices, explaining the housing problems in this city is an effective way for moving toward housing desirability in the cities of Karaj. Methods and Material This research is descriptive-analytic in terms of research method and in terms of its purpose is an applied research. The statistical population is the head of households in 12 areas of Karaj city. The sample size is 486 households head and the sampling method is a probabilistic method or random method. Data collection is based on the survey (questionnaire) and documentary method (Statistics of statistic center of Iran). Also, Data are analyzed by SPSS23 software. Results and Discussion The results of the study on the indices of housing in the studied neighborhoods indicate that in terms of physical dimension, type of materials used in urban housing is the most important variable and the use of the double window is the least important variable. In the dimension of social sustainability, the most important variable is the impact of migration on non-standard housing constructions and the least important variable in access to health centers. In the dimension of economic sustainability, the most important variable is the amount of urban housing with the personal owner and the least important variable is the amount of government loan received for housing improvements. In general, the results indicated that in most of cases, the stability achieved was moderate or less than average, and the results showed a significant difference between the different regions in terms of sustainability indices. So, the results of the research show that the 12 areas of Karaj are located in three levels of stable, semi stable and unstable in terms of housing sustainability. The general results show that regions 4, 7, 8, and 11 are considered as "stable regions", and regions of 1, 5, 6, and 12 are considered as "semi-sustainable regions" of Karaj. Also, regions 2, 3, 9 and 10 are among the "unstable urban areas of Karaj city". Conclusions Today, housing as one of the most important human needs is investigated from a variety of dimensions. Also, housing as an important part of the human environment plays a vital role in sustainable development of cities. Stability and sustainability of housing embrace the environmental, social, cultural and economic aspects of housing that are intertwined. In this regard, the aim of this study was to evaluate the indicators of housing sustainability in Karaj city. Different indices have been used to measure Karaj city districts housing stability in different dimensions. These indices have been designed according to the indicators used in global experiences, internal experiences and in accordance with the region conditions (LOCALIZATION of indicators). This research extracts the strengths and limitations of housing sustainability in Karaj to move towards greater sustainability. In general, it can be concluded that the study area houses, in contrast to the past, have more sustainability, and the indicators for sustainable housing development have been upgraded compared to the past. In the past, for example, most of the houses were built with unstable building materials while today, according to the statistics presented and field observations of writers, we see improvements in the majority of residential units within the study area, which has led to the development of physical indicators.