The topic of this master thesis is the analysis of a multi story structure building, the dimensioning of its elements, and the life cycle assessment (LCA) of the structure. The paper is divided into three sections. The first part provides a theoretical overview of composite structures, analyzing their advantages and disadvantages. Additionally, it elaborates on t he importance and methodology of conducting a life cycle assessment (LCA), with an emphasis on sustainable design. Fundamental principles and criteria used in the structural design are also addressed. The second part focuses on the practical application of the structural design. It includes load analysis, a global structural analysis, and the preliminary selection of elements for the numerical model. Special attention is given to the design of the structure concerning ultimate and serviceability limit state s, alongside a detailed analysis of seismic actions. Furthermore, a calculation of characteristic connections is performed. The final section of the paper covers the application of LCA analysis. In this stage, three different structures of identical floor plan dimensions but made from different materials are compared. The analysis focuses on quantifying the environmental impact of the structure throughout its entire life cycle, from material production to final disposal, with a particular emphasis on ecolog ical sustainability.