What exactly is a floor plan? Floor plans are scaled diagrams of one room, or many rooms in a home. The diagram is an aerial view from above and it depicts the actual size of the space. Floor plans include scaled measurements of walls, doorways, furniture, windows, and architectural pieces such as fireplaces or stairs. A floor plan is useful because it helps you design a furniture layout and it gives you insight into how a space will look. A floor plan is a 2D drawing that is