Section 24(6) in Kerala Municipality Building Rules, 1999
(6)Any room intended for human habitation and not abutting on either front, rear or side open air spaces shall abut on an interior open space whose width shall not be less than 2.4 meters:Provided that in the case of buildings upto 7 meters height it shall be sufficient if such interior open space has a minimum width of 1.5 meters.
