This architectural drawing is Built up area calculation design in detail AutoCAD drawing, dwg file, CAD file. The built-up area, also known as the plinth area, refers to the entire apartment unit, including the walls, sit-out, balcony, terrace, and utility. In other words, it is the area that a building occupies, including all floors and any cantilevered sections. As a general rule, this is 10% higher than the carpet area. For more details and information download the drawing file.