Currently, the development of the institution of land lease for construction purposes has led to the formation of a new type of contract, allowing to determine its independent place in the system of contractual obligations for the temporary possession and use of property. The main goal of this article is to study the features of the condition on the subject of the lease agreement for a land plot provided for construction purposes, which are determined by the purpose of the agreement and other factors. The goal is achieved by establishing the legal nature of the lease agreement for a land plot provided for construction purposes, analyzing the features of the existing mechanisms for concluding such a contract and examining its essential terms in detail. In solving the above problems, general scientific (synthesis, system analysis, analogy) and special (formal-legal, comparative-legal) methods are used. Based on the results of the study, it is formulated and substantiated that the technical and economic parameters of the object under construction are an essential element of the condition on the subject of the lease agreement for the land plot provided for construction purposes.