The purpose of the article is to present in the historical aspect the results of research of issues related to the construction of library buildings, to characterize their current state (building areas, material and technical characteristics, buildings – objects of cultural heritage, etc.) for to develop recommendations on improving the library space and its organic use. The author analyzed conceptual works on the construction of libraries that define historical stages in the design and construction of library buildings in the USSR and modern Russia. The tradition of considering issues of organizing library buildings in the structure of library science developed at the beginning of the 20th century. The analysis of the study of library science publications revealed absence of complex consideration of the problem of organizing library buildings. Historically, many central libraries occupy buildings dated the 18th–19th centuries, and one of the actual tasks of librarianship is to preserve buildings that present cultural value, to create conditions for the organic use of their space, taking into account new information technologies, the development of the library as a modern multifunctional cultural and information social institution. The library architectural heritage of central libraries of the country constituent entities needs reconstruction and restoration in order to preserve the information potential that their collections contain. The Sector for the Organization of Librarianship of the Scientific and Methodological Department of the Russian National Library carried out the analysis of the database of business cards of central universal libraries of Russia to identify the quantitative characteristics of the buildings of central libraries of the constituent entities of RF, to get information on their current state and to develop further recommendations for improving the library space.