Yes. I've built a couple for my kids and one for a customer.
i made one a long time ago. I did not want to endanger the tree so the tree house was built around the branches and trunk. At no point was any part of the house actually touching the tree. It was built on stilts and anchored into the ground. I guess technically it wasn't a "treehouse". Since then I have found many building plans on line.
Yep ... When I was in middle school.
There's a show on called "Treehouse Masters". Very interesting to watch, if you're into nature or architecture.
No. The trees where I grew up weren't the kind you could build on. My brother started to build one for his kids, but a neighbor called the city, and he was told to take it down. In Florida you have to involve an engineer and show in your plans that it can withstand +100 mph winds because of hurricanes.
Hi Ray! Yes, I did it once, but I was a kid and had no carpentry skills. I built a hut-like structure in a medium sized tree, but I soon ran out of wood to solidify it. When I finally got the funds to carry on with the works, I noticed that bugs were already eating my house up! I eventually gave up and never got to complete it! All the best with your project!