40 square feet or so, not counting a micro-loft....the trailer is just over 5' wide, and 8' long.
Special thanks to Dustin "Dr. Demoltion" Diedricksen, my brother/best amigo, who was more than a help, and our other instructor at this workshop. He and I will be finishing off this cabin ourselves- if we don't freeze to death doing so!
STILL working on a new tiny house, tiny playhouse, shack, fort, tree house, houseboat, and shelter book- if you have photos of one you saw, or built, send 'em to kidcedar at gmail dot com. This book will be a follow-up to "Humble Homes, Simple Shacks" (which you can order below).