We live in Campbell Ca and our neighbor has 100 pine tree that borders our property line. We received permission to trim limbs over our fence and did so. The problem is that the tree has a significant curve to it (it truly looks like huge C) and trimming any further up over our property would make an already hazordous tree top heavy and extremly dangerous. Two professenal arborist have seen the tree as well as campbell code enforcement and all agree the tree is dangerous as is. We have sent certified letters to the landlords notifying them as to how dangerous this tree is one buy arborist. The owners have basically told us they wont help and dont care. We were simply being courtious by notifying them that this tree on one of their many properties might pose a liabilty. The trees roots are also ruining our fence and deck.We would like to keep our house and cultisac nice as well as safe. Dont have the right to keep our house free from ruin?