This book explores various methods for testing the foundations of buildings, construction materials, structures, and entire edifices. It details testing procedures, the instruments and equipment used, and the latest standards for designing and conducting experiments. The text offers practical recommendations for organizing technical inspections of foundations, structures, and buildings, as well as for analyzing the data collected and preparing expert reports. Additionally, it provides modern insights into the mechanisms of deformation and failure in structures, as well as the influence of different factors on the stress and strain states of foundations and constructions. Designed for master's and bachelor's students, construction engineering students, as well as graduate students and professionals in the field.