Carpet Space | Important Things | RERA Carpet Area | Built-Up Area | Super Built-up Area | Difference | Real estate | FAQs

Carpet area fundamentals mean built-up Areas, and you should understand super Built-up Areas first. After that, an illustration contrasting each area’s importance in price computations is given.

carpet area means
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Here is a quick guide for you:

What does Carpet Space Mean?

A property’s carpet space or area includes the portion encircled by the walls. In layman’s terms, it refers to the total area in which you can install a wall-to-wall carpet. Typically, the carpet area of a flat represents 70% of the built-up area of the same unit. 

The area refers to an apartment’s floor area, excluding the region surrounded by exterior walls, areas under assistance shafts, exclusive roof terrace, and exclusive balcony area. It does, however, include the area bounded by the apartment’s internal partition walls. 

The unique terrace area refers to the terrace area next to the infrastructure that supports the unit’s user floor space for the allottee’s use. Exclusive balcony refers to the size of the patio next to the infrastructure to support the grantee’s floor space.

Carpet Space Calculation Example

Use the information below to get the carpet space or area per floor of a three-story building:

  • The building’s plot size is 1900 m2.
  • FSI Permitted = 1.
  • The carpet area to built-up area ratio is 0.9.


FSI = Built-up Area /Plot Area

Or, 1 = Built-up Area/1800

Thus, Built-up Area = 1800 m²

Now, The built-up area of each floor = 1900/3 (since the building is a three-storeyed building)

= 633 m²

Given, The ratio of Built-up area = 0.9

i.e. Carpet Area/Built-up Area = 0.9

or, Carpet Area/600 = 0.9

Thus, Area of Each Floor= 633 x 0.9 = 569 m²

Total Area of Building = 569 x 3 = 1707 m²

What Does the Carpet Space or Area Cover?

Bedrooms, dining rooms, study rooms, dressing rooms, Bathroom balconies 

carpet area cover
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What the Carpet Doesn’t Cover

  • Walls, both internal and external
  • Typical regions
  • Utility ducts and interior parts for terraces

Formula to Calculate

Room size divided by wall thickness equals carpet space. Inner wall area plus floor area equals carpet space.

How to Calculate

The following is the formula:-

Room size divided by wall thickness equals the carpet space or area. This means you can compute the carpet size by determining the room’s general location and then deducting the wall’s thickness from that figure. 

You can use this formula to determine the room’s carpet space. By using an example, we can comprehend it. As mentioned, 70% of the built-up area is covered in Carpet. Therefore, if the room’s build-up size is 1000 square meters, the carpet space or area will be 700 square meters. Knowing the room’s built-in space will help us determine where the Carpet will be.

Important Things Related To Carpets and Its Area

important carpet area means
Source: Photo by Sina Saadatmand on Unsplash

Additionally, the builder must repay the reduced area plus interest within 60 days if you want to reduce the site after construction. On the other hand, if the space is expanded during construction, the buyer is responsible for the additional room for the carpet. In essence, the Carpet space provides the foundation for complete recalculation.

Inspect the carpet area and ensure it matches the real floor space for which the builder has given you an estimate. The developer must mention Carpet space or room on marketing materials, sales contracts, sales deeds, and other legal documents. If developers or builders provide incorrect information on the carpet area, they will be fined 5% of the entire real estate project cost.

You can also have information on ceiling designs for the hall.

What is the RERA Carpet Area?

“The net useable floor area of an apartment, excluding regions covered by exterior walls, spaces beneath services shafts, exclusive balcony/verandah space, and exclusive open terraces area, but includes the region enclosed by the internal walls of the unit,” is how the RERA defines carpet space. 

According to RERA-Real Estate Regulatory Authority, the area consists of an apartment’s net useable floor space plus the internal walls, less the size of exterior walls, services shafts, exclusive balconies or verandah areas and exclusive open terraces. Complete here signifies that the allottee will solely use the open deck location. Developers & builders must all quote the RERA when selling a property, not any other space.

Why is it Important?

The actual usable area is made more transparent to purchasers. Developers and builders provide price quotes based on the RERA-defined carpet area. Establishes carpet area as a benchmark that buyers can use to compare projects.

The definition of residential housing is based on carpet space. For non-metro cities, it is 90 sq m, whereas it is 60 sq m in metro cities. Dealing based on carpet area has contributed to the real estate market’s adoption of good and effective design trends.

Since the carpet space typically makes up about 70% of the built-up space, calculating the RERA floor space or using a RERA carpet size calculator is simple. For instance, if a property had a constructed area of 2000 square feet, its floor area would’ve been 1400 square feet. Here are some guidelines to keep in mind while determining the carpet area:-

  1. Consult a private technical assessor for assistance.
  2. Ask technical and legal assessors of the property to verify specifications if you are taking out a house loan.
  3. Be cautious since a builder may offer a higher price depending on the RERA carpet area; thus, bargain after examining the costs of comparable properties.

What is the Built-up Area?

The built-up area of a building is created from the exterior perimeter walls. It represents the total area of a house’s walls, Carpet, and other unused features like flower gardens, terraces, and dry balconies. There is always more built-up space than carpeted space. 

Built-Up Area Includes

  • Carpet Area, Interior Walls, and Exterior Walls. 
  • Utility ducts as well as other interior components like sewage and water conduits.

What Built-Up Area Excludes?

  • Elevator lobby
  • Hallways Garden Area
  • Courtyards
  • Conduits, tanks, etc.

Built-up Area Formula 

Built-up = Carpet Area + Wall Area + Utility Area + Interior Area, The built-up area typically exceeds the carpet area by 20%.

Important Points Related to Built-Up Area

  • In most property deals before RERA, the built-up area served as the primary unit. How much actual ample space a customer would receive used to be complicated and unclear.
  • Built-up Area has been substituted with a more standardised and discernible Carpet space or area unit.
  • Nevertheless, you can calculate the estimated amount of Carpet space or area by understanding the Built-up area.

What is a Super-Built-Up Area?

The built-up area and shared space, which comprises, among other things, the hallway, elevator lobby, and lift, are added to create a highly Built Area. Developers occasionally include a pool, lawn, and clubhouse as standard area amenities. Since a developer or constructor bases their prices on a site’s well-developed, it is referred to as a “saleable” region.

Super Built-Up Area Meaning.

By including the space utilised by common facilities, such as the hallway, the lift lobby, and the elevator, developers may calculate a unit’s super-built-up area. Sometimes, developers offer shared spaces with gardens, clubhouses, and swimming pools.

What is Covered in the Super-Built-Up Area?

  • Building of the apartment
  • Clubhouses and pipe ducts and air shafts
  • elevators, staircase lobbies, a pool, and a gym
  • More standard facilities

Formula to Calculate the Super Built-Up Area

A super built-up area consists of the built-up area plus the corresponding common area. Alternatively, the Super built-up area equals the Carpet space (1 + the loading factor).

Super Built-Up Area Calculation Example

  • To further understand these computations, let’s use an example.
  • The super built-up area will be determined as follows if the floor area is 800 square feet as well as if the builder adds a 20% loading:
  • 800 (1 + 20%) plus Super Built Area is the equivalent area. 960 Super Built-Up
  • Consequently, paying for 960 square feet will cost you money.
  • Let’s say Sanjay Mehta has an apartment on the fifth floor of a housing society with a built-up area of 1,000 square feet. Amit Lal lives in a house with 2,000 square feet of built-up space on the same level. One thousand five hundred square feet amount of shared space on the floor.

To come at the super built-up area of the two flats, the builder would now divide the total built-up area of the apartments by their respective ratios (in this example, 1:2), adding 500 square feet to Mehta’s overall built-up area & 1,000 square feet to Lal’s total built-up area. Mehta’s flat is massively built to 1,500 square feet, whereas Lal’s is 3,000 square feet.

Difference Between Carpet space or Area, Built-up Area, and Super Built-up Area

difference carpet area means
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Carpet Space or Area

The carpeting in the apartment makes up its whole usable floor space. This refers to the area that is left over after subtracting the balcony, verandah, and wall thickness. Simply put, it is the amount of usable space you receive. The definition for the Carpet space under RERA is slightly different, though. The carpet area’s inside walls are taken into account.

The general area is what RERA referred to as the carpet space after removing the room’s wall thickness, the private balcony or verandah space, and the entire open terrace area. While also accounting for the thickness of the inside wall.

Keep in mind that developers and builders employ the RERA-defined Carpet space. This means that the price is determined by considering the carpet space or area, which includes the inner thickness of the wall. 

Built-up Area

This refers to the space inside a building that is measured from its exterior boundary walls. The carpeting area and wall thickness are included. It also has additional apartment spaces, like the patio, flower beds, and a dry balcony.

The built-up area is calculated using the formula below:

The built-up area is the sum of the carpet and wall areas.

Sup- Built-Up Area

The whole property area, including Carpet and built-up area, is referred to as a super built-up area. If you don’t know what the carpet area is, I must explain that it is the space you may use in a building or, put it another way, here you can install Carpet. 

In contrast, built-up area refers to the space used by the complex’s entry lobby, hallways, stairways, elevator shafts, lift lobby, power room, clubhouse, security room, and other common facilities.

Please be aware that the area occupied by an underground sump, storage tanks, walkways, swimming pools, open athletic facilities, climate sheds, inaccessible flower beds, lofts, etc., is not included when calculating the super-built up area.

Carpet Area, Built-up Area, and Super Built-up Site in Indian Real Estate

Before the RERA obliged them to offer flats based on the carpet space, builders commonly utilized the super-built-up area as the space-measuring unit to capitalize on the uncertainty around space calculation. As a result, they decreased the cost per square foot of the property by measuring it in terms of a super-built-up area. Additionally, it provided the impression that the consumer was purchasing a large home even when they weren’t.

“The super-built-up area is the crucial figure developers seek to utilize to market their projects. They arrive at this figure by mixing common spaces with built-up areas. The super-built-up area is also saleable since it has become a standard for developers to charge their buyers.

According to Vijay Verma, CEO of Sunworld Group, he says, “When there are numerous units on a level, the computation of a substantial built-up area is done differently. For example, consider a house with a 1,000-square-foot carpet and a price tag of Rs 2,000 per square foot. 

In this instance, the total cost of the property will be Rs 20,000,000. To make the sales pitch even more enticing, a developer may provide a super built-up area (say, 1,300 sq ft) and sell the property for less money at Rs 1,800 per sq ft. In addition, the property would have a total cost of Rs 23.40 lakhs. To an unwary customer, the latter would always seem far more appealing than the former.


Is there anything else than the Super Built-Up Area that affects the price of the apartment or flat?

The loading factor, determined by multiplying the carpet space or area by a factor, determines the proportional share of standard room inside an apartment (1.25). The carpet space is subtracted from the super-built-up site. Developers frequently use the loading factor to establish unit pricing.

What does the RERA definition of a carpeted space?

“RERA defines carpet area as “the net usable floor space of an apartment, excluding areas below services shafts, exclusive balconies or verandahs, and exclusive open terrace areas, but including the area covered by the internal partition walls of the unit.”

What distinguishes a carpeted space or area from a super-built-up region?

The walls of your residence enclose the area. The saleable area is equal to the overall built-up area of your apartment, plus your proportionate share of the communal amenities in your building complex. The commerce district is the commerce district.

What does PMAY’s area of carpet do?

According to the PMAY, “the net useable floor space of the apartment, excluding that covered by outside walls but including that covered by internal partitions of the flat,” is meant by the carpet area. The carpet space or area is “the area confined within the walls and the real area to lay the carpet,” according to the government’s PMAY program.

What is an apartment’s carpet space?

The phrase “carpet space or area” refers to an apartment’s net useable floor space, which includes regions protected by internal partition walls but excludes freedoms protected by exterior walls, areas below services shafts, private balconies or verandas, and completely open terraces.

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