With the relentless motivation of my father-in-law and his help (well, I helped him actually) the tree house is now actually a box in a tree. We used a pulley and a large truck to hoist each wall up to the platform

and then set it in place and bolted it down and bolted it to the other walls.







(helping with the final wall)

It took us most of the weekend, but it all came off well with no injuries and successful completion.

(Inspector indicates approval)

Now the ball is back in my court to find a way to get some kind of a roof on the thing before it all gets wetted repeatedly this winter. Here are some photos for those of you who can't see it locally. It's 10 feet up a 140 foot Douglas Fir, and YES it does move a bit when the wind blows. The tree is 19" in diameter (bark included) at the 10' level where the floor platform was constructed.