VERY interesting! For some reason I thought this would be an easy one...
And it's turned out to be anything but!
The neighbor who lives in that house also happens to be co-owner of the building that I put my new dental office.
I'm not sure whether to continue the question, or just give the answer and start a new question.
OK, I'll try a hint.
The owner of the property tells me that he tried to do something in the traditional way, and then found out that because of the soils, he had to try something that was "engineered".
