The article is devoted to a comprehensive study of methods for risk assessment of investment and construction project. The absence of a universal method of evaluation determined the relevance of the work. The task was to explore the types of risks ICP and methods of evaluation, especially to explore methods of quantitative risk analysis. The object of the study was a construction of unique buildings and structures.The main types of risks inherent in all investment projects and in particular the building have been identified. Special attention to the quantitative methods of risk assessment was given. Some of them were analyzed by the example in relation to investment and construction projects.Selection of the normal distribution to describe the accidental changing of settings was justified in thearticle. It was concluded that the formation representative samples for study may be effected by the Monte Carlo method.