A convertible electrical device cover including a base and an adapter coupled as an assembly and configured to accommodate an electrical device. When the convertible electrical device cover is placed in an operative position over the electrical device the adapter may be located between the electrical device and a rear of the base. A method for installing a convertible electrical device cover is also disclosed including placing the convertible electrical device cover in an operative position over an electrical device so that an adapter may be located between the electrical device and a rear of a base.