CMDA divide building into three categories....

Q: I need some details about the categories of buildings made by Chennai Metropolitan Development Authority.

Chandra mouli, Chennai

15th September 2014

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Replies (2)

Hi,
May I know what are the areas which are excluded from FSI ?

Ramana Vignesh, Chennai

15th September 2014

Comment

Hi,

There are some areas which excluded from FSI. Like:-
Area covered by stair-case rooms and lift rooms.
Lift wells in all floors.
Area of basement floors/parking area.
Service floor with height less than or equal to 1.5 meters.
Porches.
Area of balcony or service verandah if it is below or equal to 5% of the size of each dwelling unit area.
& Structures used for water treatment plant and effluent treatment plant which are set up with clearance from TNPCB(Tamil Nadu Pollution Control Board) etc.

Rangaraju, Chennai

15th September 2014

Hi Mr Mouli,
As per my knowledge, The rules laid down by the CMDA divide buildings into three types, ordinary buildings, special buildings and multi-storeyed buildings. This classification is based on the height of the buildings, number of households in a plot and extent of commercial activity.

Tilak, Chennai

15th September 2014

Comment

Hi Mr Chandra,

The ‘ordinary’ buildings are the buildings that do not exceed a height of 9 m (30’) in height. These are generally low ground plus one-storeyed building. The ‘special buildings’ cannot exceed a height of 15 m (50’). These are generally residential or commercial buildings with more than two floors but not more than 4 floors.

Hemanth, Chennai

15th September 2014

Hi All,
The ‘special buildings’ are, as the name suggests, a special type of multi-storeyed buildings. These consist of residential buildings with more than four dwelling units and commercial buildings exceeding 300 meter square (3228 sq. ft.) of plinth area.When it comes to these buildings, the height of 15 m matters more than the use to which they are put, be it residential or commercial.

Sudeep Savanth, Chennai

15th September 2014

HI,
I want to know about the Floor Space Index (FSI)....Can anyone share some details about it ?

Ramana Vignesh, Chennai

15th September 2014

Hi Mr Ramana,
As per my knowledge, The Floor Space Index (FSI), also known as Floor Area Ratio (FAR), Floor Space Ratio (FSR) and Plot Ratio, is the index by which the total constructible area can be calculated. This index is used by the authorities to control the density of development.
The FSI for ordinary and special buildings (residential and commercial) is 1.5. This means that the plinth area should not exceed 1.5 times the area of the plot where construction is being projected.

Rajnikanth, Chennai

15th September 2014

Hi All,

In chennai, Development Control Rules, has been framed by CMDA, based on these rules FSI is one of the measures defined that controls the population density in an area. FSI (Floor Space Index) is defined as the total covered area on all floors divided by the plot area. In other words, it can be defined as the ratio of Plinth area in a project to the land area. This ratio gives us an idea about the maximum extent of floor area that can be constructed in a plot.

Yugesh Gowda, Chennai

15th September 2014

Hi Ramana,

As per my knowledge , the area covered by the ground floor should not exceed 70% of the plot area. This rule is kept in place to ensure that enough area is left at the ground floor for plants and trees. This also ensures that some area is left for escape in case of emergencies.

Rangaraju, Chennai

15th September 2014

Hi ,Vignesh,
Like Mr Rangaraju said, I will say the last two restrictions of the FSI.
Based on the dimensions of the plot, some area needs to be left around ,this space is also known as setback space.
The height of the building is also supposed to be less than 1.5 times the width of the road or 9 m. whichever is smaller.
Due to these additional restrictions, it is often not possible to attain the FSI.

Harish, Chennai

15th September 2014