A wall mount enclosure has a backpan with a back panel and a plurality of side panels extending forwards from the back panel. A plurality of extensions are releasably attached to the backpan side panels and to adjacent extensions to form an extension assembly extending forwards from the backpan. The extension assembly as an assembly is releasable from and attachable to the backpan, and individual extensions are releasable from and attachable to the backpan and their respective adjacent extensions. At least one door is removably attached to one of the extensions and movable between a closed position and an open position.