In this paper, we will address the topic of determining the deflection of the balcony edge. We will explain the occurrence and main causes of deflection in detail and demonstrate the procedures for its calculation. We will describe practical methods for measuring deflection, the deformations it causes, and possible solutions for reducing deflection in structures. In the first numerical example, we will determine the elastic line of the beam, as well as the deflection and rotation angle of given points using the graphic-analytical method. In the second numerical example, we will determine the deflection line of the beam using the analytical method and calculate the corresponding deflection and rotation angle of a given point. We will compare the graphical, graphic-analytical, and analytical methods, their practical applications, and their respective advantages and disadvantages. The aim of this thesis is to provide a comprehensive overview of methods for determining the deflection of balcony edges and thereby offer guidelines for future engineers.