Something compatible with blender would be nice
FreeCAD is definitely a good tool for construction and design
Maybe this can serve you, it generates buildings in 3D (Procedural), yoy can export as OBJ, (Html5)
See also the other projects from the author
My guess would be FreeCAD but I’ve never used it so I’m not sure.
I use freecad for General 3d modeling… piracy is always an option
All about open source! Feel free to ask questions, and share news, and interesting stuff!
Community icon from opensource.org, but we are not affiliated with them.