Abstract: A method of retrofitting an elevator to an existing multistory building includes providing a preassembled elevator unit comprising an enclosure containing an elevator car and a drive mechanism for moving the car within the enclosure; forming a plurality of vertically aligned elevator access openings though the exterior of the building; positioning the preassembled elevator unit against the exterior of the building, in alignment with the plurality of vertically aligned elevator access openings; and securing the preassembled elevator unit against the exterior of the building, in alignment with the plurality of vertically aligned elevator access openings. The preassembled elevator unit preferably includes a self-supporting elevator shaftway enclosed on the sides and back, and having at least one access opening in the front of the shaftway; an elevator car mounted in the elevator shaftway for movement therein; and a driver inside the shaftway for moving the elevator car in the shaftway.