This graduation theses includes a study of the parameters that influence the energy efficiency of the settlement. Influence of factors, that utilization of solar potential depends upon, was observed. According to the discussed apartment building typology, three different, existing urban patterns in Ljubljana were selected; terraced blocks in Koseze, atrium blocks on Vič and skyscraper along Streliška cesta street. For each individual model the building, which is the most unfavorable in terms of solar gains was selected. With the Rhinoceros 3D program, I created the urban patterns models, where a parametric study of the factor which has the greatest influence on the received solar radiation was performed. The first parameter that was observed was the distance between the buildings, where I increased or reduced the spacing between the objects; the second parameter of the observation was the rotation, where the objects were rotated from 0 to 30 ° in the direction from south to west. The next parameter was the range of the inward part of the atrium, which changed the size of the inner courtyard. The last parameter of the discussion was the building height where I changed the level of the adjacent objects. Two types of analysis were performed; the first was done with the software tools Grasshopper and Diva, where I calculated the average annual solar radiation received by the treated object, and the other included the calculation of the energy required for heating the object in the UMI software tool. The analysis showed that when designing energy efficient buildings, the appropriate density should be taken into consideration, where the solar potential depends on the distance between the objects, the floor area ratio and the consequent mutual shading of objects, as well as the orientation where is the most important the maximized exposure of surfaces to sunlight and its associated shape and object geometry.