Make Your Own Greenhouse--Includes a list of supplies and detailed instructions along with pictures.
amazing treehouse, step by step. very cool but I think I would make the ladder on the interior... or possibly not have a ground floor at all, it kinda takes away from the whole "being up in a tree" experience. :] Would it be socially unacceptable for a 20 something woman to build a tree house... for herself?
Step by step tree-houses