A Z plugins list Ruby Library Depot. Library of Ruby scripts to add useful commands to SketchUp. How to draw your own tiny house floor plan designs. Rear.jpg?itok=3V-wg_ja' alt='Sketchup Housebuilder' title='Sketchup Housebuilder' />This is part 3 of my video lesson on using Sketchup to design small structures. This lesson uses the Housebuilder plugin to create the framing model for a. Miss Potter Ita Download. As the name suggests, Housebuilder provides you with a set of tools for creating typical framing components like walls, gabled walls, floors, and roofs.