To create a space provided with facilities of power source, gas, water supply and drain to carry out a series of laundry works such as washing and drying, using an electric washing machine or a dryer, by making use of a structure having an entrance of a balcony or the like in an apartment block.

An all-weather laundry compartment unit has a floor face 20. One of four side faces is substantially open as shown in the figure and touches the side wail having an entrance for a balcony or the like. The periphery is sealed 28 and the entrance is accessible from the indoor side. The laundry compartment unit is equipped with a lead-in port 25 or the like for gas 34, tap water 33, and a drain pipe 32 connected to an external drain gutter. Further, when a gas dryer is used, an exhaust outlet is extended to the outside.