you can't take over your mother's bank account. The account will be first frozen, although banks will usually disburse to cover certain bills. Depending on the size and complexity of the estate and the will, you may then need an executors account and utility bills can be paid from this for the time being. Once the estate is distributed, the owner(s) of the house will need to take on responsibility for the utility bills. If there is more than one owner, then they will need to decide how to do this.