Section 21 in The U.P. (Regulation Of Building Operations) Directions, 1960
21. Minimum size and requirement of ventilation for a habitable room. -
(i)The minimum area of a habitable room shall not be less than 100 sq. yds. with a width not less than 9 feet and the minimum area of kitchen, bath, latrine, and combined bath and latrine shall not be less than 60 sq. ft., 16 sq. ft., 12 sq. ft. and 28 sq. ft. respectively. It shall derive its ventilation through an open verandah or directly from a street or a courtyard.(ii)Every room except store shall, for admission of light have at least one window, opening directly to open air, or in an open verandah. The aggregate open area of all the windows shall not be less than 10 per cent of the floor area.(iii)The dimensions of the courtyard shall not be less than half the height of each of the opposite side walls.
