Neighborhood decaying.

Depreciation basically says that the physical structure of your house will decay and lose value over a period of 27.5 years because everything will need to be replaced like the roof, siding, appliance, etc.

Obviously, there are still other factors, but things like over-building are less likely to counteract the socio-economic and population trends, as new construction is rarely competitive for rental units.So, the metrics you list above are much more likely to help you determine whether market demand and cash flow will remain strong as opposed to whether values will increase and what extent.The problem is, the property you've been discussing won't likely cash flow at all.

Much of the older - 1960s and 1970s - product lies in flat or slowly decaying C neighborhoods. 

The trick is to use these activities (research, reading (knowledge), and analysis) to counteract the inner negative voice telling you otherwise. 

All that fading you see is the granulation keeping the sun's heat from damaging the shingle.If you coat that granulation with black paint or tar, you're counteracting that sun reflection and the shingles will overheat and cool from daytime sun to nighttime cooling.

That means that whatever radon is there on any day, 3.8 days later, half has decayed to another substance.

Also, 3” is a huge section of decay— usually these are caught at about the size of a dime (because they leak).

A UV light will need to have the bulb changed probably every year.One investor that I know claims that a disgruntled tenant continually ran the water to saturate the septic and drain field, causing him to spend $25,000 for a new system, immediate afterwards he sold the property.Shallow dug wells are susceptable to all kind of pollution including fertilizer, chemical and natural, septic systems, insects and even a decaying animal.

But on the off-chance that it’s true, you can counteract any negative affects on search results by asking all of your friends to “heart” your listing on AirBnB.