Apparently, a lack of sociological and psychological understanding of the complex social and individual needs of contemporary humans constitutes a major problem in developmental policies and programs. One of the developmental programs that have been implemented in recent years was the building of Maskan-e mehr project. Since life satisfaction is very important in society’s stability, welfare, and the reduction of social problems, studying this issue and its role in social planning becomes necessary. Hence, this article aims to measure the level of life satisfaction among Maskan-e Mehr residents. This is a quantitative study that utilized a questionnaire and its research population consisted of all the residents of Maskan-e mehr project of Foolad-shar in the province of Esfahan. Using Lin’s table with a 5 percent margin of error, 384 individuals were selected as the sample. Findings indicate that the level of life satisfaction of 22.4 percent of respondents was low, of 51.8 percent was medium, and of 25.8 percent was high. Research findings also show that life satisfaction was positively and significantly related to residential sense of belonging (r=0.593), religiosity (r=0.293), and social capital (r=0.686). The results of regression test showed that the variables like participation, income, residential sense of belonging, education level, household expenditures, previous place of residence, marital status, age, belief orthodoxy and consequential dimensions of religiosity, and social trust would, on the basis of their importance, enter the regression equation and altogether could explain 81 percent of the variance of the dependent variable.