Construction is one of the most important branches of the economy. The specificity of this industry causes that logistics plays a huge role in conducting construction works. The metalogistic system related to the delivery of materials to the investment site is particularly important here. The aim of the article is to present the essence of the functioning of construction wholesalers, taking into account logistic support for construction services and to point out the significant benefits for the builders resulting from cooperation with an construction warehouse. The participant observation method was used. Based on the analysis, it was found that construction wholesalers play a very important role in the logistics systems of construction companies. The main benefits that they offer the builders include not only the availability of materials and their timely delivery synchronized with the work schedule, but also the access to many additional services.