Abstract: The present invention relates to a utility compartment, including propane powered generator and storage compartment, that is readily adaptable for rear end affixure to a travel trailer or motor home. The apparatus consists of a carrier support frame which may be rigidly interposed between the travel trailer frame and existing bumper structure, which carrier support frame then forms the bottom paneling and side support structure for receiving unitary side paneling. The apparatus is provided with a center divider panel defining a generator compartment and a storage compartment, and a top-opening lid is secured thereover for hinged opening and locked closure.