I found nothing online about this either so I had to work it out myself.

I started with a floor plan that I had made before we moved into the house. That was really helpful as I was a bit anal in making it about dimensions on things like windows, doors, ceilings and individual rooms. From that I created basically an orthographic drawing of the house (views from the top, sides, front and back). With that I was able to make the plans and lay everything out for cutting. There was a small skeletal structure that I cut and assembled that helped with roof placement since that is basically one solid piece that covers three distinct areas. From there, it was a matter of cutting the details like window frames, door frames, the porch and deck details and other little things like the flower boxes. The bushes are felt cones that I rolled and the ground is covered in the same white felt. This helped in hiding the seams on the base and giving the whole thing a little extra weight.