Aim. The presented study aims to create a unified information environment for all participants of construction project implementation and to monitor key indicators of construction during its implementation.Tasks. The authors develop a methodological approach to substantiate a unified information environment for the implementation of capital construction projects; develop modules of the information environment that reflect the processes of designing a facility and managing costs at all stages of its life cycle. Methods. This study uses the methods of analysis and synthesis, graphical modeling, expert and comparative assessments, methods of pricing in construction.Results. An information environment for the implementation of capital construction projects is developed. Its major modules reflect the processes of designing and constructing a facility and managing costs at all stages of its life cycle.Conclusions. Introduction of the proposed information environment for managing construction costs at the enterprise level with an integrated design module based on information modeling technologies will improve the efficiency of interaction between the participants of the investment and construction process and will provide a unified cost management algorithm in the context of the active digitalization of the industry.