Bill Fry Construction - Wm. H. Fry Const. Co. Hi Zebra13:

Glad you like our tree fort!

It has caught the eye of two houzz article writers:
Ideabook: Hideaways for the Hectic Holidays
Ideabook: 9 Incredible Treehouses
and been added to over 3700 idea books! When I added the photo for fun a while back, I never realized how much attention it would get! Since then, I've added a couple of other photos as well, that you can find here:
Project: Tree Fort or Tree House - San Francisco Bay Area

You would think that as a general contractor, we'd create real plans for our own tree fort, but it came about rather quickly when we suddenly had small gap in employment for a couple of our carpenters. The elapsed time was a couple of weeks, but it wasn't being worked on full time. We knew where we wanted it and that we wanted father and son to be able to fit inside sleeping. While we were putting in the foundation we sketched out the next steps and found fun places to sneak in some side windows. There's a proper foundation and roof - so all I can say is that it was not a project for the budget-minded. Our "methodology" of not having a plan actually worked in our favor in creating a better project - although I wouldn't recommend it!

:) Rhoda
http://www.billfryconstruction.com/