Also known as a half-bath. This room will have a toilet, and sink. As with the bathroom, the sink will have a medicine cabinet with a mirror. This will allow family and visitors to be able to shave without having to use the bathroom which might be occupied. Since there is a lavatory in every apartment (except SROs, efficiencies, and studios), a failed toilet is not an emergency unless the toilet is overflowing. In which case, you would want to turn off the water line immediately.