FreeCAD is definitely a good tool for construction and design

My guess would be FreeCAD but I’ve never used it so I’m not sure.

Maybe this can serve you, it generates buildings in 3D (Procedural), yoy can export as OBJ, (Html5)

https://watabou.itch.io/procgen-mansion

See also the other projects from the author

https://watabou.itch.io

deleted by creator

I use freecad for General 3d modeling… piracy is always an option

https://wiki.freecadweb.org/Arch_Workbench

https://wiki.freecadweb.org/BIM_Workbench

https://blenderbim.org/