I came up with this Parametric Wall Builder as Im always building houses from CAD plans. It enabled me to be able to quickly build the walls and window, door & garage holes without needing to adjust the geometry by hand, it all works using splines. Its also helpful if a client comes back with changes to the Elevation as you can readjust the splines and the windows & walls readjust instantly.
You can adjust the Wall height, thickness & plaster size using user input parameters as well as the window capping thickness.
James Vella 
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