How old does the child have to be before they can decide whom they want to live with?
Children do not have the right to decide at any age. But a Court may well consider the wishes of a mature 11 year old, but not the wishes of an immature 15 year old. The Court is concerned with what is in the best interest of the child and not simply what the child wants. Sometimes however Courts feel, especially with much older children, that there is little that they can do to force them to live with someone.