How are Built-up and Super Built-up Areas calculated?

In our blog last week, we defined the calculation of the carpet area of a property, which is essentially the area between the walls of a property.

Built-up Area or BUA consists of this carpet area along with the area covered by walls (thickness of external walls, internal walls and columns) and additional areas mandated by the authority such as flowerbeds, dry balcony etc.
It is typically 10-20% more than the carpet area and is also sometimes known as the plinth area.

Super Built-up Area or SBUA consists of BUA and the proportionate area under the common spaces of a building. This includes area covered by common amenities, such as the area of lift shafts, lobby, and corridor, proportionately divided among all flats using those amenities. The common usable areas, such as a swimming pool, garden and clubhouse, may also be included in it.

Living Room

Image: Anukampa Platina Terraces

To calculate the cost of a property, per square foot rate quoted by the developer is typically applied on the super built-up area. This is the reason super built-up area is also sometimes referred to as the saleable area.

A builder can place anywhere from 65%-85% of the super built-up area as carpet area. That means, if the price is quoted as Rs.1000 per sq. ft. super built-up area, the carpet area could be anywhere from Rs.650 per sq. ft. to Rs.850 per sq. ft. If this break up is not mentioned in the agreement, demand that the vendor/ builder mentions it in the sale deed.

What is Carpet Area and how is it calculated?

Simply put, Carpet area is the area between the walls, that is, the actual area to lay the carpet on. This area does not include the thickness of the inner walls. It is the actual used area of an apartment or commercial unit. Additionally, carpet area must have a permanent roof over it, at a normal height.

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Carpet area is calculated by multiplying dimensions of a room, i.e. length x width. We get the total carpet area by adding carpet areas of all the rooms, varandas, passages, gallery inside the main door and balconies.

Depending upon the builder practice, carpet area may be 50% to 70% of the saleable area. It is used to calculate the cost of the property you’re buying. So, if you’re planning to buy an apartment or an office, always check the ratio of carpet area to the saleable area; because higher the ratio, the better value you get for your money!

There are other terms as well, that will help you size up the value of space you’re getting for the price you’re paying. These are: built up area and super built up area, about which we’ll talk in the upcoming blogs. So if you found this information useful, do follow us and share the post with your friends.