Size of Room 

Habitable Room 

    Every dwelling unit to be provided should have at least two habitable rooms. Even if one room house is provided initially it should be capable of adding a new second room in future. However, in case single room tenements are required to be provided where future additions are not possible, the carpet area of multipurpose single room should be at least 12.5 m2. Such one room dwelling units with 12.5 m2 carpet area of habitable space is permitted only in case of on site rehabilitation of slum dwellers. In a house of two rooms, first room shall not be less than 9.0 m2 with minimum width of 2.5 m and second room shall not be less than 6.5 m2 with a minimum width of 2.1 m provided the total area of both the rooms is not less than 15.5 m2 . In incremental housing the bigger room shall always be the first room. 

    To facilitate incremental housing in case of flatted development or otherwise, habitable space at mezzanine level may be permitted. The minimum size of such a mezzanine floor should not be lesser than 6.5 m2 and such a floor should occupy not more than 50 percent of the room area of which it is a part. Such a mezzanine floor should have appropriate openings to facilitate light and ventilation as per 

    Minimum clear height below and above the mezzanine floor should be 2.4 m and 2.1 m respectively. As far as possible mezzanine floor should have direct ventilation from the external face of the building. Where this is not possible ventilation through main room may be allowed provided total area of openings in the main room is provided taking into consideration area of mezzanine floor. Such mezzanine floor may be accessible through the main room by a ladder, whose minimum angle with vertical plane should be 22½°. Height of the riser should be less than 250 mm. 

Water Closet/Bathroom 
1) The size of independent water-closet shall be 0.90 m2 with minimum width of 0.9 m; 
2) The size of independent bathroom shall be 1.20 m2 with a minimum width of 1.0 m; and 
3) The size of combined bathroom and watercloset shall be 1.80 m2 with minimum width of 1.0 m. 

Kitchen 

    The size of a cooking alcove serving as cooking space shall not be less than 2.4 m2 with a minimum width of 1.2 m. The size of individual kitchen provided in a two-roomed house shall not be less than 3.3 m2 with a minimum width of 1.5 m. 

Balcony 

    The minimum width of individual balcony, where provided, shall be 0.9 m and shall not be more than 1.2 m and it shall not project beyond the plot line and on roads or pathway.