Section 78(2) in Assam Notified Urban Areas (Other than Guwahati) Building Rules, 2014
(2)The height of the ground floor and each of the upper floors shall not be less than 4.2m and 3.9m respectively and the height of the cellar of basement shall in no part be less than 2.4m provided that these rules shall not apply to the extension of the ground floor and upper floors of the existing building.
