What is the name of your state (only U.S. law)? Virginia. Our neighbor, who we are friendly with, is directing the bottom splash receiver(or whatever it is called) and all the water coming off his roof and down his downspout onto our property which is about 15-20 feet away from the property line. Every time it rains and especially when it rains heavily we get a large puddle of water on our property directly below where their downspout is emptying. It is in our grass and in front of where our garbage pails are kept making it impossible to get to our garbage without rubber boots. The water gets ankle deep and the ground gets very mushy. Occasionally, during very hard prolonged rains, we get water in our lower basement level of our home which I think is caused by the raised water table on our/their property. What is their responsibility as far as directing the water from their property onto ours? We are friendly but have only been neighbors for about 2-3 years and have never really spoke to them very much.