As many of the citizens of California might have experienced first-hand, runoff water can be devastating to a house. Moreover, if a homeowner's property was damaged as a result of runoff water coming from the neighbor's land, disputes are bound to arise. That being said, it is worth bearing in mind that the law will consider neighbors legally liable for the damages only when they have landscaped their land and this alteration has influenced the path of the runoff water.
With that said, an individual looking for restitution from their neighbor for damaged property has three types of laws with which to tackle this neighbor dispute. The Reasonable Use Rule, a law followed by a majority of states, requires the aggrieved to show that the alterations carried out by their neighbor were unreasonable and that these alterations are directly to blame for the increased flow of water onto the damaged property.