You are here: Home | How To: Build A Treehouse How to build a solid treehouse platform A stable substructure is the be-all and end-all of tree house construction. The task is to transfer the loads evenly and as gently as possible into the tree trunk. Here you can find out how this works best… Building law, permits and regulations Register your tree house project with the authorities or simply build on it? Up to what size is a tree house permit-free? Experienced tree house builders explain… How to plan and design your tree house Find out what it takes to plan a tree house… How much does a treehouse cost? This article helps you to better estimate the cost of your tree house project… What size can my treehouse be? You want to build a tree house and are not sure how big and how heavy it can get? Here you will find the most important basics of tree (house) statics.