I have a crawl space foundation on an inlaw apartment I had added on to my home that is sinking. The foundation has cracked and separated and the interior shows signs of sinking where a doorway is slanted so the door won't close and large cracks have appeared in several areas. I'm pretty sure that the apartment is sinking becuase of trees and brush being buried in the spot where the apartment is now, when I had the main house built. At the time, I didn't anticipate the need for an inlaw apartment. There is a lot more to this story but the bottom line is that I need to know the kind of professional company that could handle this type of problem. I went to Concrete Network.com as recommended by an engineer but they couldn't suggest a contractor doing work in the Rhode Island area. I would really apreciate any suggestions anyone has.