A wooden door for installation as the entry door of a new or remodeled residence is completely factory prefinished by fabricating all wooden parts to accurate dimensions and staining all these parts, including cut-outs in the door blank for a lock assembly and other hardware, before assembly. After preliminary staining and assembly, all final finishing operations are performed on the door, and it is packaged in a protective package, along with its hardware, and shipped as a separate item to the resident site. The frame in which the prefinished door is to be mounted in the completed residence is also factory assembled, a temporary door of expendable quality is installed therein, and the frame and temporary door are shipped to the site independently of the final door for installation as soon as the residence has been completed to the point where installation of the door frame is in order. Then after construction or remodeling has been completed except for the entry door, the temporary door is replaced by the prefinished door. For doorways which include sidelights, the sidelight assemblies are similarly completely factory prefinished and supplied in a protective package to the site, and while the door frame is in place during construction or remodeling, the openings in the door frame for the sidelight assemblies are temporarily filled by hardboard panels which are replaced by the finished sidelight assemblies when the final door is installed.