Abstract: The invention contemplates a modular wall-mountable lavatory unit, particularly adapted to side-by-side adjacent mounting in multiple, and comprising interrelated basin and other lavatory-utility features defined by intermediate and side panels and by the contoured wall and shelf elements by which the panels are integrally connected and mutually reinforced. The unit structure accounts for such complete wall coverage as to be directly applicable to (suspendable from) rough stud-framing of a wall and, if desired, to both sides of a single stud-framed wall. The unit structure is also directly applicable to a wall which externally mounts horizontal courses of water-service and drainage plumbing.