My rental unit was flooded by up-stair neighbor.

Some house electrical/cement businesses/pool-spa stores or just coffee/bake stores.

Not only was the stench nauseating but in order to get that smell out, you have to rip out the floors and treat the underlayment (yes even if it is cement) AND treat the walls with a special primer to kill the molecules and smell, then paint that.

It's a 2204 sqft home that is currently a 3 bed 2 bath with a down stairs that have two rooms/bedrms now but would need to have egress windows put in to meet code to be listed as such with a 3rd room possible to make it a 5 bedrm 2 bath home. 

., has two large rooms on the sides after going down the stairs, and a full bath (which seemed to operate 50~ years ago as its all completely unusable and lost to time at this point). 

Needed to have the openings cut clean, new back board, chicken wire, cement, stucco, and painting.

On the exterior this presents itself visibly as cracks in the foundation(brick facade or cement underpinning, for example). 

If its atop the durock you could use mortar or or leveling cement, just need to ensure it fully dries and cures before placing the vinyl atop it, this would leave it pretty flat and ready for the vinyl

We had to replace the deck railing, paint a bunch of stuff, fix stairs, build out the kids bunk room etc.What we did was rent it to people we knew who were interested in a discounted rate to have a vacation.

We haven't had any issues lately, however if in fact the survey is correct, I will be repairing/pouring a new cement driveway to help with the pitch and run off of water.