Area Calculations in Buildings Different Types of Area Calculations in Buildings Understanding different area calculations is essential for architects, builders, real estate developers, and buyers. These definitions, as per IS 3861:2002 and the National Building Code (NBC) 2016 , help standardize measurements and ensure transparency in construction and real estate transactions. Below is a detailed explanation of the concepts, along with additional insights and examples. 1. Carpet Area (Net Usable Area) Definition: The carpet area is the actual usable area within the walls of a residential or commercial unit. It is the space where you can lay a carpet, hence the name. This area is exclusive of walls, balconies, and common areas. Key Features: It is the most important metric for buyers as it reflects the actual living space. It is typically 70-75% of the built-up area , depending on the design and layout of the building. ...
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