If the tree is inside the boundary of your property then it will be your tree. Even if it has grown onto your neighbor's property, it will still be considered yours. If the tree is rooted in the boundaries of your neighbor's property then it will belong to them. However, there can be situations when the tree will grow on the property line. This means that you and your neighbor share its ownership, and both of you will be responsible for tree removal service Marietta GA.