The study examines various efficiency indicators affecting economic activity and efficiency assessment methods, the application of which can contribute to increasing the efficiency of economic activity. The research examines the field of management of real estate, especially multi-apartment residential buildings, its most important elements and the factors influencing it, describes the form of management of the apartment owners' cooperative society with its peculiarities, analyses the term efficiency, lists and describes the types of efficiency and related concepts - competitiveness and productivity, as well as the indicators affecting them, the methods of evaluating efficiency and the indicators affecting it are examined and analysed, the consequences of increasing efficiency in economic activity are identified, the risks of economic activity are examined. In the study, an in-depth study of the researched organization from legal and practical aspects is carried out, the involved parties are analysed, a management plan is developed, risks in the researched organization's operation are identified, and the efficiency of the researched organization's operation is evaluated.