The model for choosing rational diversification strategies of construction companies based on an expert assessment of construction's technical and economic parameters is described, which considers the most significant indicators and the advantages of participants in the construction process. These advantages and the features of diversification strategies are included in the indicators of the diversification center, which should be created in the construction company. Since this task is complex and requires the involvement of a separate team of experts, if it is impossible to create such a center within the st ructure of a construction company, it is necessary to involve a consulting company that deals with this problem. The method of evaluating diversification strategies of construction companies has been improved, which is distinguished by taking into account changes in the structure of companies' organizational environments and allowing them to increase their management efficiency. This method is based on expert assessment and considers the opinions of all participants in the construction process: owners, developers, investors, general contractors and designers. In the future, the method described will be implemented in the activities of construction companies, and the obtained results will be verified. Implementing the method of formation and evaluation of diversification strategies is an essential component of ensuring the stability of the development of construction companies and obtaining their profits. The obtained results, both theoretically and practically, serve as a basis for further scientific and applied research aimed at improving various aspects of the management of construction companies. The described tools are essential practically for construction companies and holdings. In the long term, the use of the developed methods and models will positively impact the development of the country's construction industry as a whole.