Unity overlay AR building

i'm Trying to overlay a .Obj File building on top of the real building but Obj files have no positions / local positions for the elements, Does anyone have an idea of the process ? or even better files to use ? the Obj File is generated from an uploaded IFC (Everything on runtime) i even tried using collada files since they do have positioning but i haven't found any Collada Runtime importer,

Example: of what im trying to do (Picture) (be able to visualize a building on AR)

Thanks in advance!