On the base of study of literature, we examined rearing systems of cattle, norms for the new construction of barns and elements necessary to ensure animal welfare and animal health. In the second part of the thesis, we prepared a design for a barn for fattening bulls on the farm Razboršek. The family farm Razboršek is located at an altitude of 660 m, and is considered as a small farm. The cattle barn we currently have in use is no longer suitable for further use, so we decided to build a new barn for fattening bulls on new location. We made a design for the new construction of the barn based on a review of the literature and examples of good practices in the neighbourhood. In this thesis the ground plan of the barn for fattening bulls is presented. A 3D view of the new barn was made with the Sketch Up software. In the new barn we will have space for 16 animals. Fattening bulls will have free access to feeding alley. The manure will be stored in a manure pit under the grates. With free barn we will contribute to the better health and well-being of the animals. The barn will be very simple, built mostly from the wood and we will use wind nets to protect against the wind. Although the herd is very small, the new construction on our farm is of great importance, as it will make our work easier and provide better conditions for the rearing of animals on our farm.