Vaastu considers a square (or rectangle) as the basic form of quantum space and therefore chooses to build the main body of any structure in either one of these two shapes. Actually, the basic form is nor a square, nor a rectangle, but a cube. So, with Vaastu we not only consider the horizontal plane dimensions but also the vertical. Within the frame of this cubical three-dimensional main body of the structure, carefully designed variations on the cuboidal form are welcome.

In keeping with creating a “resonant” perimeter, all other design elements such as interior walls, doors, windows, etc., are ideally also mathematically and geometrically calculated to the perimeter, the same vibration.

Vaastu structures (houses and offices) are designed along a 9×9 grid with 81 equal-sized modules, called Padas. To the left is a drawing of this 9×9 grid. We can see how a human form is drawn sitting inside of it in a yogic position. This grid is known as Vaastu Purusha Mandala or the grid of the personified living space. The lines of this grid carry the energy of the motherwall into the space. By aligning walls, doors, etc. according to these lines they are nurtured with that same beneficial energy.