Apartment complex Free (Subdivision ready 3D model) is available on CGTrader for free. Original author: Arnold-the-engineer.
STL (Stereolithography, filesize: 216 KB), OBJ (OBJ, filesize: 1010 KB), DXF (DXF, filesize: 3.13 MB), DWG (AutoCAD, filesize: 1.16 MB), USDZ (USDZ, filesize: 366 KB)