The uncontrolled and irresponsible release of large amounts of greenhouse gases of anthropogenic origin increases the negative impact of climate change, which represents an ever-increasing threat to society and the economy. The aim of various international climate and energy initiatives is to reduce the negative impact of climate change, which, among a series of directives that have influenced energy consumption reduction, has resulted in the emergence of the smart readiness indicator in the building sector. The purpose of the indicator is to rate the smart readiness of buildings, i.e., the application of digital technologies. This paper discusses the development of the Energy Performance of Buildings Directive, which affects the future introduction of smart readiness analysis for buildings. Ultimately, smart buildings help achieve the goal of decarbonizing the sector through better monitoring, management, and integration of thermal and all other energy systems in buildings. Additionally, this increases the energy efficiency of existing systems, integrates renewable energy sources, improves air quality and comfort, and encourages innovation and investments. In this paper, the smart readiness indicator is described in detail along with two examples of analysis and application in multi-family residential buildings and single-family homes in European countries. A preliminary analysis of two scenarios of technical systems in the Geotechnical Faculty building is also conducted. The technical systems of the building are further described to present their characteristics. The analysis shows that the systems in both scenarios achieve the smart readiness indicator rating which is far from satisfactory. Based on this, an additional analysis was made for the purpose of determining the age and lifespan of technical systems. The results of the analysis show that technical systems are outdated and they are not worth upgrading with smart technologies. Such results further confirm the smart readiness indicator ratings obtained from the scenario analysis. The replacement of all systems is recommended except for the photovoltaic collectors installed in 2023, for which an upgrade is recommended. It is also recommended to analyze various combinations of technical systems with which the Geotechnical faculty building could be upgraded in the future. This analysis would pre-assess the possibility of system integration and joint management, enabling parts of all installed systems to communicate with each other. The goal is to evaluate the building's "smartness" for such scenarios, aiming to reduce energy consumption and provide a smart readiness rating.