This article describes techniques for designing a pedestrian city street in an existing building. At the beginning of this article, methods are described that determine the level of elaboration of the modernization of a city street into a pedestrian. Also publications on research into the problems of modern urban spaces are mentioned. Then the results of the analysis and the concept of the design solution are presented in the article. At the end, the assessment of the developed design solution is given. In conclusion, the results of adapting existing methods for designing urban improvement for modern engineering technologies are presented. As a result of the development of a design solution, wastelands were excluded from urban space and the promising urban development value of the territory as a whole was increased.