Disclosed is a prefabricated module including, in one piece: a shower compartment, with a shower; a toilet compartment, with a toilet seat, the shower compartment and the toilet compartment being arranged longitudinally opposite one another; a kitchen compartment, which included a sink and a cooking appliance; a technical compartment, which included: a domestic water supply and a water heater, supplying domestic water to the shower and sink; an energy supply, supplying energy to the cooking appliance and the water heater; the kitchen compartment and the technical compartment being arranged between the shower compartment and the toilet compartment, which are transversely opposite one another, of the prefabricated module.