Google Sketchup is a free yet very powerful 3D CAD software which will allow you to move through and explore your home as it will be built without making a scale model. It will give you an excellent idea of how the home will feel. Free Sketchup download                  This is a Google Sketchup CAD file of the framing plan for the 21' Craftsman tiny house by Red Door Tiny Homes. Every single measurement, angle and cut of every piece of lumber that makes up the craftsman is contained within this plan. And the best part is that everything is changeable to suit your needs! Just download Sketchup for free and begin changing window placements, door sizes, ect. Don't want to use Sketchup? No Problem! this plan also includes flat drawings with dimensions of all of the framing. You can simply print them out and get to work!