(1) In the main building, no plinth or any part of such building or outer house shall be more than 0.9 m (3'-0") and less than 0.5 m (1'-8") above the ground level, the reference ground level being taken as 15 cm above the abutting footpath level or road crown level whichever is higher, vide clause (9) of rule 95.
PART I] THE KOLKATA GAZETTE, EXTRAORDINARY, FEBRUARY 14, 2007 55
(2) The minimum plinth height in respect of bathroom and water closet only may be reduced, provided the required slope for drainage up to the manhole is available. For this purpose, the minimum plinth height has been fixed as 30.48 cm (i.e. 1.-0") only. In no case the rules of minimum height and size of the room would be relaxed.
(3) The minimum floor level of the garage shall be 15 cm above ground level.
(4) Every interior courtyard shall be raised at least 30 cm above the footpath of the abutting street, and shall be satisfactorily drained.