Abstract: A prefabricated bathroom assembly and methods for its manufacture and installation are disclosed. For example, a prefabricated tub and/or shower assembly may be provided. In some embodiments, the prefabricated assembly may include at least a bathtub or a shower pan, tile surround(s), and a ceiling. The prefabricated assembly may be constructed substantially entirely off-site relative to a construction site and shipped to the construction site, for example, in substantially a single piece. Finishing face trim for making a seamless transition from the prefabricated assembly to the adjoining walls and ceiling may also be provided. In other embodiments, at least partially prefabricated panels (e.g., 3 wall panels and 1 ceiling panel), a tub or shower pan, the face trim, and/or other components may be shipped separately to the construction site for on-site assembly.