The floor plan is the drawing of the outline and partitions of a building as you would see if the building were to be sliced horizontally around four feet above the floor line. It provides more specific information about the design of the building than any other drawing from the home construction set.
Designing a home is something that takes years of practice. Sure, most of us can come up with plenty of design ideas via thumbnail sketches or back of the napkin drawings. But there is a difference between abstract concepts and actual measured designs.
With so many house plans available to view on the web and in print magazine, it's easy to see why so many take a shot at designing a floor plan layout. There is nothing wrong with the idea. In fact, that's how many of my clients come up with some of their ideas and home designs which are presented to me.