The house REEKS of cat urine.

The unit smells strong of dog urine. 

Have allowed cats in the past and their urine smell goes right through the hardwood floors.

While this flooring is water proof, we are still concerned about the cat urine getting into the seams and baseboards.Our question then is whether we should take the additional fee ($400) and rent ($25/month), or stick with our policy and communicate that they must remove the pet from the property within a stated timeframe.Any advice or lessons learned would be greatly appreciated!

I have always rented to very reasonable people who I suspect would note the difference between a house that requires normal cleaning following a turnover and one that has urine stained carpets, chewed up woodwork, etc.

The hurtle is the time and money to invest to build a system that "does it all".

Unfortunately, if the urine is in the carpet, pad, and sub-floor, spraying OdorXIt on top of the carpet probably isn't going to do the job.NEVER put a pad under the carpet in a rental!

They are hoarders and the house smells very bad of cat urine.  

Cat urine can be pervasive.

They are renting a 2000sqft SFR.I have read some of the posts with the issues with cat urine and trying to clean up after the tenant leaves.I'm debating what to do.