For sustainable urban development, it is essential to densify existing settlement structures in light of the continuously growing population. In the current discussion about density, the low-rise typology makes an important contribution: with their two- to four-story houses and private gardens, low-rises offer a similarly high degree of individuality as single-family homes, while requiring only a fraction of the land resources. Additionally, they provide collectively used outdoor spaces such as streets, alleys, and squares. Sixty selected low-rise settlements are examined regarding the efficiency of their utilization, occupancy density, and land ratios. The focus is not only on architectural qualities but also on the relationship of the numerical results concerning floor plan typology, apartment keys, settlement structure, access logic, and quality.