The detailed project includes architectural and structural solutions; the project includes engineering solutions for heating and ventilation, water supply and sewerage, power supply, low-voltage networks, engineering preparation of the construction site, internal and external on-site networks. In short, a detailed project is a set of working drawings and text documents developed following state code, regulations, and standards, containing the necessary information about the construction object, and is the basis for the production of building and installation works.

The working documentation is signed by the responsible executors, agreed with the relevant state authorities, and undergoes the project expertise.