Section 17-162. Admissible evidence

In such proceeding, evidence shall be
  receivable by the court without a jury to prove:
    1. That the rental of the building was enhanced by reason of the  same
  being  used  for  illegal  purposes,  or  being  so overcrowded as to be
  dangerous or injurious to the health of the inmates; or
    2. That the building is in a state of defective sanitation, or is  not
  in reasonably good repair; or
    3.  That  the  building  is unfit, and not reasonably capable of being
  made fit, for human habitation.