This is a collection of three buildings that can be found in a typical downtown city. The ground floors are not just flat textures and have some depth to them.

Polygon counts are suitable for mobile usage and the buildings have some details that allow them to stand out instead of just a flat block with textures

Each building has a diffuse / specular texture as well as a prefab containing three different LOD variations

Triangle (polygon) counts for LOD0 / LOD1/ LOD2 are
Building 1 = 9090 / 6110 / 698
Building 2 = 8406 / 4898 / 930
Building 3 = 6344 / 2506 / 354