Socio-economic evaluation can be considered the best choice for selection of the projects to be financed from public sources. The concept of social value, calculeted by means of Cost-Benefit Analysis, is complicated not just by the method itself, but mainly by having to determine the shadow value of goods, which appear on the input and output sides of the project. this text aims to show the theoretical concept of determining a shadow price of the land as one of the factor which enter the evaluation model of infrastructure projects.