How to Build a Wooden Treehouse Wooden tree houses are a great way to get kids outdoors. They can be used as a playroom or a secret hideout. They can also be used for sleeping overs or to relax and read. When building a treehouse made of wood it is crucial to choose the right materials. The kind of wood you choose to use will depend on its strength, cost, and appearance. 1. Tree House with Deck The wooden treehouse bed with trundle features deck space, bunkbedsstore.Uk allowing access to multiple ways to the treehouse. The homeowner added the climbing wall as well as half-spiral staircase on one side. The homeowners have also put in an outdoor swing made of wood and garden furniture to relax in the garden. This treehouse was constructed by a family of four children. They chose a sturdy solid tree to construct their platform on.