An entry door replacement can include the door slab, frame, threshold, weatherstripping, glass, sidelights, hardware, trim, and finish details. The right scope depends on whether the existing opening is square, dry, secure, and ready for a new prehung system.
For Naperville homes, the entry needs to look right from the street, lock reliably, seal against cold and humid weather, and handle daily use without sticking or leaking air around the frame.