Abstract: A trimmable door is disclosed comprising a pair of horizontal rails, a pair of vertical stiles, first and second door skins, and a foam core. The first and second stiles are made from a composite material that is easily trimmed to enable the door to be custom fit to the unique shape and dimensions of a particular door frame opening, such as is common in the renovation market. The first and second rails also may be made from a trimmable composite material. To provide an additional measure of adjustability, the first and second door skins may also be trimmable. The first and second door skins may be compression molded and have a texture and grain approaching that of wood. The foam core may be a foamed-in-place polyurethane material. The composite material used to form the first and second stiles may be a co-extrusion material of polymer and wood flour.