This paper describes the topic of deep foundation on piles. Deep foundation is elaborated as well as its division. Piles are described as a type of deep foundation and a division was made according to the type of material, method of execution, diameter and impact on the surrounding soil. The research works are carried out at the subject location for the purpose of collecting informations of soil characteristics for the deep foundation project and their results are described. The geological profile of the soil has been determined, and considering the amount of subsidence, it is necessary to base the construction on piles, and it is neccesary to prepare a deep foundation project. The deep foundation project performed the calculation of the stability of the foundations and regulated tehnical conditions for their construction. The examination established that this is unfavorable ground for the foundation of the type of building envisaged by the project, which is especially true for high parts where subsidence exceeds the permissible limits. The calculation proved that the level of subsidence of a high part of the building was satisfied for the foundations on the piles. The low part of the building, which consist only a basement and a ground floor,has the same level od subsidence as in the case of tall building based on piles. Dilatation is made so both parts of the building affect each other as little as possible.