We are admittedly big fans of treehouses – both child and adult versions. And its pretty clear we aren’t the only ones. Spending quality time up in some branches is so popular that an entire design studio and workshop has formed and grown in Seattle to fill our dreams. The Treehouse Workshop offers a series of four-day workshops for those who wish to DIY and build their own dwelling, along with master treehouse designers. For those who wish to leave the work to others, those master builders can design a custom space to fit your needs.