One of the models Parfett designs is the Tube, a slender room that can be built off site. Mellen says the company wants to do more "off-the-peg" designs like the Tube and Pod, to add more affordable and easily integrated models. Each tree house is assembled in pieces via sophisticated computer technology in a warehouse to maximize control and minimize waste and on-site disturbance.  Modern Treehouses by Aileen Kwun from Bespoke Treehouses Let You Live Above the Tree Line