Diverse types of specified restrooms may be realized, including change rooms with connecting hygienic services corresponding to the characteristics imparted by the C.O.N.I. sport association governing body for various sports. The modular construction form consents the creation of comfortable and functional environments complete with internal and external finishes, ceramic pavements, sanitary units, faucets, fixtures and fittings, ceramic finishes for shower and restroom zones with the possibility of central heating and water heating systems. All plumbing and electrical installations are encased within the walls and certified by the appropriate standards conformity declarations.