They caused damage and the kitchen appliances and flooring and I found out that they were housing a cat without permission which led to a flea infestation when they moved out.

I was able to raise rents, paint, landscape, and remediate an insect and bat infestation.

A structure is unfit for humanoccupancy whenever the code official finds that such structure is unsafe, unlawful or, becauseof the degree to which the structure is in disrepair or lacks maintenance, is unsanitary, vermin orrat infested, contains filth and contamination, or lacks ventilation, illumination, sanitary orheating facilities or other essential equipment required by this code, or because the location ofthe structure constitutes a hazard to the occupants of the structure or to the public.

For example, it looks like "infestation" isn't covered, but we do regular pest control.

Sanitary ConditionsThere must not be a rodent or vermin infestation 13.

The termite inspector's report read that there were signs of a previous termite infestation but it looks like the property was treated and there were no current signs of termites. 

And, if you fail to provide an infestation-free, leak-free/mold-free environment in a rental property, you're headed nowhere good. 

The house had a heavy smoker, WAY too many cats and some how a mice infestation.

=====Now, of the ones I did:First was a total rehab, including replacing termite infested walls, but I knew that would be likely.

I have a home that was infested with cats.