Often, units that are sitting on grade will see deterioration of the cooling fins, due to animal urine or other contaminants, and physical damage, both of which affect performance.

So its just deteriorated over time thats why the OP says you can buy houses there for 15 to 30k they price for risk and the 15 to 30k homes are just land lords selling their beat to crap rentals and escaping that ares..

I see this all over Philadelphia with Properties built around that same time that are deteriorating due to contractors missing these small ticket items. 

Tenants are not the most knowledgeable or reliable people when it comes to telling if a property is deteriorating or not.If you haven't been there over a year, and there has been a consistent leak that the tenant hasn't noticed because it's on the exterior of the property.

Thanks in advanceYou know, I used to worry about an ever increasing deterioration in income to equity ratios but as I get older, I am more and more comfortable with dead equity.

These records can give you a clearer picture of how well the building has been maintained and any potential expenses on the horizon.To address concerns about issues like a deteriorating foundation or sewer problems, ask the condo association for documentation related to past repairs and maintenance.

Because the condition of the building has deteriorated requiring substantial renovation she decided to stop renting it out after the last tenant moved 2-3 years ago.

But you can buy or build A class and let it deteriorate to eventually become a D.

Properties like this have a tendency to escalate in their deterioration and can eventually lead to arson; which we certainly want to avoid.

The property had sat vacant and neglected since then, rapidly deteriorating and becoming an eyesore to the neighborhood.