FSI is decided by the city municipal corporation or the development authority according to the development control regulations (DCR) and varies across different cities as well as localities.
The FSI in Bengaluru is calculated according to the size of the plot and road width. For plot size of up to 3,875 sq. ft. with road width up to 40 ft., the realizable FSI is 1.75. For plot size of 3,875-10,760 sq. ft. with road width between 40 ft. to 60 ft., the FSI is 2.25. The FSI for plot area of 10,760-21,520 sq. ft. and road width between 60 ft. to 80 ft. is 2.5. The FSI for plot area of 21,520-43,050 sq. ft. and road width between 80 ft. to 100 ft. is 3. The FSI for a higher area and road width beyond 100 ft. is 3.25.
Government authorities is also planning to offer financial assistance to low-income organizations regarding home mortgages. Better FSI norms and also stamps duty rationalization regarding subscription might also prove critical.
FSI for a project can be obtained by dividing the total carpet area of all flats in the project divided by the land area of the project. In Bangalore the FAR is decided based on the Plot area, Road Width, Area Development category (A,B,C). etc.
Floor space index (FSI) or floor area ratio (FAR) basically defines the ratio of the total covered area of construction to the total plot size. For example, if the FSI/FAR is 1 and the total plot area is 2,000 sq. ft., then the maximum buildable area of the building must not be more than 2,000 sq. ft.