The GroupByKey worked perfect. The groups are actually apartments. Every unique apartments get its own plan view and needs to be placed on a sheet. That is why I needed a cropped plan view (not 3d view) for the plan view. So instead of using the Steam’s Element.Create 3D Cropped View, I used the View.SetCropBoxCurve from the MEPover package to set the crop regions in plan view.
Thanks!!!