Treehouses: High-end style goes out on a limb ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Tree Top Builders Inc. Tree Top Builders Inc. of West Chester, Pa., built this treehouse in Weston during the winter months. Nelson Treehouse and Supply Nelson Treehouse and Supply of Fall City, Wash., built this treehouse with the varied rooflines and the Arts-and-Crafts-style elements on the Cape. The Treehouse Guys LLC Situated among a row of Norway spruces, this three-level tree house by The Treehouse Guys LLC in St. Albans, Vt., fits over one branch and under another. Tree Top Builders Inc. An adventure park-like treehouse in Wayne, Pa. Nelson Treehouse and Supply Built by Nelson Treehouse and Supply of Fall City, Wash., this treehouse with brewery is in Loudonville, Ohio. The Treehouse Guys LLC. This treehouse by The Treehouse Guys LLC of Warren, Vt., was built for a little boy in Barrington, R.I., as a gift from his grandmother.