There is a willow tree on my neighbor's side of the property-dividing fence within 4-5 from my concrete slab foundation. It appears to me that the roots of the tree are under my foundation to a point that they are lifting and moveing the house. What I believe is evidence of this appears all around the outside and inside the house. The top of the tree now extends above the top of my one-story house and is rapidly approaching the top of my neighbor's 2-story house. The trunk of the tree has grown to a point that it is knocking out wood slats from the fence. What is the actual damage this tree can do to my house and what recouse do I have to do anything about it?