To customize a house means to design and build a place to live according to the specific needs or demands of those who will occupy it, or to alter an existing place to meet such needs or demands. To design and build customised dwellings in collective housing, it is necessary to apply the term “mass customisation “, which is the opposite of “mass production”. To mass-produce a house means to build the same model many times in order for it to be useful to many people.