Hi there,
It is not clear what apartment you are referring to. The blocks in Phase 2 of Don Juan have a semisotano (semi-basement) floor which is the lowest floor and the next one up is Bajo or ground floor. So are you referring to Semisotano or Bajo?
You do not explain who the person is that you call Harry Smith.
Your best bet is to contact the community administrator of Phase 2 for more information. They might be able to confirm who the owner is assuming it is the original promoter.