Abstract: A lid and seat assembly for a plumbing fixture includes a housing, a lid, and a seat. The housing includes a generally planar front surface and a generally planar rear surface. The lid is pivotably coupled to the housing. The seat is pivotably coupled to the housing. The front surface and the rear surface meet at a first edge located at a first end of the housing and at a second edge at a second end of the housing. The front surface, the rear surface, the first common edge, and the second common edge cooperatively define a continuous surface profile configured to facilitate single-wipe cleaning of the housing.