Due to the economic crisis, the Brazilian construction companies faced the challenge of remaining competitive in the market, therefore they need to be restructured. Construction projects are intrinsically risky because it changes the environment both physically and socially. Given this complexity and the great exposure to risk, this research aims to evaluate the market risks in construction projects through a field research, analyzing the perception and judgment of professionals in the area. The data analysis was performed by a multivariate index based on the statistical technique Factor Analysis that can be ordered by risk factors by degree of importance. It was possible to confirm the degree of correlation between the subgroups of risk factors and to establish a ranking of the degree of their importance, and the first one considered more relevant was the risk of reducing the quality of the workforce. It was also identified the low maturity in risk management in organizations, even though in civil works a thorough risk analysis is required.