The following are by nature unfit for habitation and may not therefore be made available for habitation, whether free of charge or in return for payment, in application of article L. 1331-23 :
1° Cellars, regardless of any alterations or modifications made to them;
2° Basements, attics, rooms with insufficient ceiling height, living rooms with no opening to the outside, or rooms with insufficient natural light or a cramped layout, unless they meet the requirements set out in articles R. 1331-18 to R. 1331-23 respectively.