This diploma thesis focuses on the construction and technological preparation of the office building in the Lomnického street. The aim of this work is to choose the appropriate construction process. The thesis contains a technical report of a construction and technological project, solutions of wider transport relations, time and financial object plan, itemized budget, design of a site equipment, design of the main building machines and mechanisms, time schedule, technological regulation, inspection and test plan, calculation of two options of the excavation of building pit and details to waterproofing of the substructure. In detail, the thesis is dedicated to secure the building pit enclosed by diaphragm walls.