How to Calculate FSI for Redevelopment?

The ratio between the total area of the plot and the total area of the building is called floor Space Index (FSI) or (FAR). FSI is also termed as floor space ratio (FSR) or Floor area ratio (FAR). FSI guidelines depend on the National Building Code. There are a couple of things you need to know to understand how to calculate FSI for redevelopment.

The value of FAR of different cities changes depending on the space. If FAR guidelines are violated while constructing a building then it can create unnecessary pressure in the city. The FAR differs according to the population growth, residential, commercial, agricultural, or non-agricultural land. 

The value of FAR or FSI changes according to the population of the city, rate of the land, power, water, and sewage facilities.

How is FSI calculated for redevelopment?

The quotient that you get by dividing the total built-up area of all floors by the total area of the plot on which it is constructed is called FSI. For example, if you possess land that is 1000 square feet in area on which you want to construct a residential or commercial building, you can construct up to 1500  sq. ft of the covered structure of the plot if the FSI of your locality is 1.5.

You can also construct apartments by compromising one or two floors or a single dwelling unit but it should not exceed more than 1500 sq. ft. You must note that you need to include a staircase area and other structures within 1500 sq. ft.

Hope you now know how to calculate FSI for redevelopment.

When we looked into redeveloping our property, I wasn’t sure where to begin with the technical stuff, like the FSI calculation. I called in a professional to handle it, and watching him work taught me a lot. He explained FSI (Floor Space Index) is all about the ratio of the total area on which you can build in relation to the land area you have. He also taught me how is FSI calculated for redevelopment. I have shared the details below.

How to Calculate FSI of a Building Redevelopment ?

Here’s how he calculated it step-by-step, making sure I understood every part of it:

• First, he checked the total area of our land. This is the base measurement, and without it, there’s no way to get an accurate FSI. It’s the first thing you need to calculate the FSI of a building.

• Then, he looked at the rules in our area, since every region has its own FSI limits. These limits affect how much you can actually build on your land.

• Next, he used the simple formula: FSI = Total Built-up Area / Land Area. For example, if the built-up area can be 6,000 square feet and the land area is 2,000 square feet, the FSI would be 3.

• Additionally, he took into account supplementary rights that could raise the FSI, such as premiums or additional space limits. He demonstrated to me how to inspect it under local regulations because this can vary.

• Finally, he double-checked everything to be sure it was accurate, especially since any mistakes could affect our plans for redevelopment.

I hope you found this helpful.

Also Read: 

Hi Kashvi, I can help you understand how to calculate FSI of a building. There is an arithmetic formula for calculating the FSI, Floor Space Index. So, the FSI of any building can be calculated by dividing the total built-up area by the plot area. Let me expand on this below for your better understanding.

How to Calculate FSI of Building?

FSI = The total Built-up Area / Plot Area

Here, the ratio shows the total floor area that can be constructed on a plot of land.  Suppose the property area is 6,000 sq. ft. and the FSI is 100%, which means the ratio is 1:1 or the FSI is 1. Then, the whole 6,000-square-foot building is built on the 6,000-square-foot plot.

Let me give you another example. If the FSI is 3.0 and the plot area is 1,000 square metres, the total allowable built-up area will be the multiplication of the FSI and the plot area, i.e. 3,000 square metres.

So, this is all I have to share with you. I hope you now know how is FSI calculated for redevelopment.

My friend is a seasoned real estate developer known for his expertise in redevelopment projects. One day I asked him

how to calculate Floor Space Index.

He told me that FSI is the key to unlocking a property's potential, a delicate balance between maximizing development and adhering to the city's growth blueprint.

Calculating the FSI (Floor Space Index) for redevelopment in India involves considering the existing FSI, the proposed FSI, and the TDR (Transfer of Development Rights) ratio.

How FSI is Calculated?

Here's the formula for calculating FSI for redevelopment:

FSI for redevelopment = Proposed FSI - (Existing FSI x TDR ratio)

To illustrate this calculation, let's assume the following values:

• Existing FSI = 1.0

• Proposed FSI = 2.5

• TDR ratio = 0.5

Plugging these values into the formula, we get:

FSI for redevelopment = 2.5 - (1.0 x 0.5) = 2.0

This means that the allowable FSI for redevelopment is 2.0, which implies that the total built-up area of the redeveloped property can be twice the area of the plot.

Keep in mind that the exact FSI for redevelopment may vary depending on the specific regulations and development control rules of the city or municipality where the property is located. It's advisable to consult with the local planning authorities or a qualified architect or engineer to determine the precise FSI applicable to your redevelopment project.

Now you know how to find FSI of building.

The FSI can be used to understand the location's usefulness and population density. Additionally, understanding the FSI is important for us even from an environmental point of view. You must be wondering how to calculate FSI for redevelopment. There are some factors you need to consider while calculating FSI. So let’s see how to calculate FSI in Mumbai for redevelopment.

How to calculate FSI for redevelopment in Mumbai?

FSI is determined using a number of variables. There could be numerous skyscrapers in Mumbai with comparable FSI levels if the development size varies clearly. The FSI factor is essential throughout any property's development. The FSI in Mumbai is computed in accordance with new regulations.

The following equation determines FSI:

FSI = Total Covered Area on All Floors / Total Plot Area

How to make extra FSI for redevelopment calculation in Mumbai?

In general, factors including current construction, trends, development theories, and local characteristics are taken into account. Even the type of land, such as a residential, rural, industrial, or corporate plot, can greatly affect FSI value. In Mumbai, FSI is recognised as one of the key factors influencing the development of the city. Minimal limitations restrict real estate because they make construction more challenging.

What characteristics describe FSI in Mumbai?

• The total area of the property.

• Location of the structure.

• Facilities offered by the place.

• The category of building it is or its intended use, like residential, commercial, or industrial, among others.

You are now aware of how to calculate FSI in Mumbai for redevelopment.

Hey,

If you want to get your dream house constructed from the ground up, you will need to know FSI

in real estate. The norms of FSI may differ from one state to another. I will tell you the meaning and related information in the paragraphs below.

The full form of FSI is Floor Spacing Index. The index showcases the maximum area over which construction can take place on a specific plot. It is also known as FAR (Floor Area Ratio). Let me give you an example. If you have a 1000 square feet land and the FSI is 100%, you can construct a building on the entire area of the plot i.e. 1000 square feet.

If you have a 1000 square feet land and the FSI is 50%, you can construct a building on 50% area of the plot. Construction will be allowed on 500 square feet.

FSI for Commercial:

Bangalore state uses TOD (Transit Oriented Development) regulations to measure FSI for plots.

In Bangalore, you will need to know plot size and road size to measure FSI yourself. The process to find FSI is the same for residential and commercial plots.

You can follow a very simple fsi calculation formula to know FAR.

FSI or FAR = Floor space covered in all floors/Area of the plot

For the most part, floor spacing index ranges between 2 and 5.

FSI is decided and calculated by the local authority or municipal councils of each state. The norms are set according to the guideline shared in the National Building Code. Higher the FSI of an area, higher will be the demand. FSI is impacted by amenities offered, type of construction and city zone.

In recent years, there has been a change in FSI for redevelopment in mumbai. The biggest change in the current norms would be The incentive floor space has increased from 2.5% to 3%.

If you have any more doubts about FSI in real estate, leave them in the comment section below.

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