This work studies construction features of the dwelling discovered at the Neolithic site Baibek. Detailed recorded data made it possible to determine its dimensions, shape and structural components. The layer by layer analysis gave grounds to reconstruct its origin and development. Pottery and stone tools, as well as other materials of the cultural layer found in the dwelling pit are similar to the materials of the Kairshak type of the Neolithic in the Northern Caspian Sea Region. A series of radiocarbon dates establishes the chronological interval of the dwelling functioning: the first quarter of the VI millennium BC. The results of spores and pollen analysis indicate the paleogeographic background at that time. The definition of faunal remains indicates the leading hunting species: onager, red deer, corsac, saiga; fish (sterlet, perch, pike, common carp, pike perch) were caught both in open and in closed reservoirs. Judging by the analysis of the crust on the inner side of the vessels, signs of animal and plant food preparation have been established. The studied dwelling complements the characteristics of the Neolithic culture of the Kairshak type bearers and possibly marks the beginning of the transition of the population to a certain sedentary life. In addition, the information obtained gives reasons to speak about the appearance of dwellings in the region of interest starting from the early Neolithic.