Section 3(3)(a) in New Town Kolkata Planning Area (Building) Rules, 2014
(a)erection, re-erection, addition to, or alteration of -(i)an internal partition wall which does not violate any of the provisions these rules, or(ii)a parapet wall or a cornice or chajja within the boundaries of the site and not overhanging a street, however, that the total height of the parapet wall shall not be more than 1500 mm and width of the cornice or chajja shall not be more than 600 mm;