This paper proposes a potential method to evaluate degree of assumptions precision made during the finite element model construction. It is very important to precisely model the stiffness properties of the whole building in order to choose correct dimensions of the load bearing elements of the building. The finite element models of two 35 story high-rise buildings were verified with the real high-rise buildings structure using the experimental data. The two high-rise buildings' fundamental frequencies data was experimentally obtained during the different stages of the construction process. The data was compared with numerically calculated to evaluate the precision of the assumptions made during the FEM model creation process.