Maybe do a survey and make sure that the houses are on their own property, not encroaching on another lot.Make sure the ground water is not so high that it floods the basement, house.Make sure there are not a bunch of termites in the ground, and eaten up wood in the houses.Make sure the soil is not shifting, depending on where the houses are located, think sink hole.Check water pressure.Sooo, many things it could be physically.Then you have to look at the social things like the houses getting broken into every other day, neighbors from the hood, or even a building inspector going through a divorce:)  Or maybe it is just something simple like the buyer could not get financed since the house is a wreck, only certain financing is available.

I would speak with an environmental company that may be able to recommend a professional for you to speak with and also research the soils.

.68 a square foot sandy brown office carpeting at Lowe’s .

As a very general number $20k for a whole system is often discussed to put it into perspective, and often the number comes in lower, however there are also times when the the soil, location, bedroom size, and other variables can push the number up significantly.

-sandy

. #1 I have very sandy soil on my property which results in good drainage, and #2 water pitches away from my house via grading and proper gutters and downspouts. 

Dunwoody, Sandy Springs, Roswell, Alpharetta, Johns creek, ect....are getting too pricey

My name is Ann Werner, and currently I am a stay-at-home mom in Sandy, Utah. 

DanYou won't touch anything under 400k in the plant high school district, and that is a property that needs work. go south of Euclid ave and the prices will drop 50k just by being on the other side of plant high school district. remember most properties south of sandy (SOG) will require flood insurance.

Maybe also look into the soil type of the lot?