The study presents a comparative analysis of technical solutions and technologies for energy-efficient capital repairs of apartment buildings. The purpose of the study is to determine the most effective ways to increase the energy efficiency of a residential building by carrying out repair work. The methodological approaches of the study are based on a statistical analysis of the data on the results of major repairs in the practice of world construction. According to the results of the study, it was found that when planning major repairs in order to reduce energy consumption, special attention should be paid to choosing a set of technical solutions that collectively contribute to improving the energy efficiency of a residential building. The analysis showed that with the introduction of modern energy-saving technologies, the overhaul of apartment buildings makes it possible to modernize each building, increasing its level of energy efficiency and prolong its service life for at least a quarter of a century, which as a result improves the quality of life of citizens and accelerates the economic growth of the country. In our opinion, taking into account the international experience of reducing heat losses and energy consumption in residential apartment buildings, it is necessary to adopt new rules establishing approaches to determining the energy efficiency class and appropriate labeling of construction products, with a transition from using a relative indicator (deviations of the actual or projected annual specific energy consumption from the normative value) to setting minimum and maximum values (ranges of values) of energy consumption in apartment buildings for each energy efficiency class.