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Due to the sheer number of construction and development projects being carried out simultaneously, often the deciding factor for the question “Which project is better?” is dependent on whether these projects meet Chennai Metropolitan Development Authority (CMDA) guidelines. Though the CMDA guidelines for developmental projects are quite extensive, let us look into one of the most important highlights that buildings should meet in order to receive CMDA approval.

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. 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. 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.

However, most of the buildings, nowadays, fall under the ‘special category’ section and hence, this is the topic we will take forward here.

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.

Constructible area = Land Area * FSI Index

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. If the area of the plot where the construction is proposed is 9600 sq.ft, with a 1.5 FSI, the total plinth area is 14,400 sq.ft. However, there are a few exemptions to the this calculation like parking area, electrical transformer room, garbage area, caretaker's room, etc., provided the plinth area of such service areas does not exceed 10% of the total plinth area. Staircase headroom and the lift machine room in the topmost floor are also excluded from this calculation.

FSI can be availed on all plots that abut on a road that has a minimum width of 30 feet. The premium FSI for plots that meet roads that have a width of 30 feet or more and lesser than 40 feet is 20% of the normal FSI. The buildings on plots that abut roads that have a width more than 40 feet and lesser than 60 feet, have a premium FSI of 30% and the plots that abut a road with a width of 60 feet or more have a premium  FSI of 40%. However, premium FSIs are allowed for specific regions only and are also accompanied by additional premium fees.

 To find out more about Floor Space Index (FSI) in Chennai, visit "Floor Space Index"

Comments   

0 #87 Krishna 2016-07-19 23:27
Hi Subhramanyam,

I would suggest that you get in touch with a builder and architect. A lot would depend on the extent of your land, the UDS that you all got earlier. shape of your plot, etc.

Thanks and Regards,
Krish
Quote
0 #86 Subrahmanyam vvv 2016-07-16 15:32
I am having one flat in kodambakkam, now we want to demolish and reconstruct the entire block since the flat has become 30 years old. At present total flats are 31flats in 3.50 grounds.
How many flats we can construct with ground floor keeping for carparking. Whom we have to consult reg approvals.
Quote
0 #85 Krishna 2016-02-10 16:28
Hi John,

I have responded to your query in the following link:

http://www.indiarealestateforums.com/forum/chennai/2782-setback-space-in-chennai#7610

Please feel free to post any further queries or comments in the above mentioned link so that I can get back to you on a quick note.

Thanks and regards,
Krish
Quote
0 #84 Krishna 2016-02-10 16:11
Hi Venkat,

In which city is this space located?

Thanks and regards,
Krish
Quote
0 #83 Krishna 2016-02-10 16:01
Hi Sivabala,

I have responded to your query in the following link:

http://www.indiarealestateforums.com/forum/chennai/2782-setback-space-in-chennai#7606

Please feel free to post any further queries or comments in the above mentioned link so that I can get back to you on a quick note.

Thanks and regards,
Krish
Quote
+4 #82 I. John 2016-02-09 12:19
Dear Sir,

I have a plot measuring around 2700 square feet + 2900 square feet of my relatives adjacent plot abutting 30 feet road in Selaiyur, Chennai-126. What is the maximum height, FSI and number of apartments that can be built with stilt floor? Please advise.

Thanks and Regards,
John
Quote
0 #81 Venkata Pushpala 2016-02-02 11:47
We have commercial space on the 200 feet road
with length of about 210 feet and depth of 45 ft s on right hand side and 25 feet on left hand side . slanting line joining at the back.

As per norms 20 feet has to left as frontage , what is the maximum built area can be achieved and for which corporate office it can be let out for rent purpose.

Regards
Venkat
Quote
0 #80 Sivabala 2016-01-25 23:36
Dear Sir,
I'm planing to buy a independent house in gerugambakkam which is coming under CMDA limit and builder has confirmed that CMDA approval got acquired and i'm going to do the document verification tomorrow. The builder has built the house on the entire 800sqft land which means there is setback at rear and side(front side is facing road). Will it cause me any trouble in future w.r.t setback
Please advice me at the earliest possible

Thanks
Siva
Quote
+1 #79 Vijay Viswanathan 2015-07-31 21:03
Hi Hemanth,

I have responded to your query in the following link:

http://www.indiarealestateforums.com/forum/chennai/2515-home-loan-for-house-with-deviation#6931

Please feel free to post any further queries or comments in the above mentioned link so that I can get back to you on a quick note.

Regards,
Vijay
Quote
-1 #78 Vijay Viswanathan 2015-07-31 20:56
Hi Chacko,

I have responded to your query in the following link:

http://www.indiarealestateforums.com/forum/chennai/1852-attachment-guidelines-planning-permission-approval#6929

Please feel free to post any further queries or comments in the above mentioned link so that I can get back to you on a quick note.

Regards,
Vijay
Quote

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