In that case (i.e. if it doesn’t need dimensions / annotations, just an accurate .dwg), the most direct path will be to export directly from SU.
For your elevations:
- Choose the appropriate view (e.g. ‘Front’) and pick ‘Parallel Projection’ from the 'Camera ’ menu. (This will flatten to 2D)
- Save as a scene and label the scene ‘Front’.
- Go to the ‘File’ menu and pick ‘Export > 2D Graphic’
- Choose ‘AutoCAD DWG File (*.dwg)’ from ‘Format’ dropdown
- Click ‘Options’ and choose preferred ‘AutoCAD version’ from the dropdown (ask your architect)
- Check the ‘Full Scale’ box (assuming your model is at proper scale)
- Choose ‘None’ for ‘Profile Lines’ and ‘Section Lines’
- Uncheck ‘Edge Extensions’
- Click ‘OK’ at the bottom of the ‘Options’ window to return to the Export dialog.
- Name your file: eg. “Warren_Elevation_Front_v1”
- Click ‘Export’
Now you have a test .dwg — I would suggest that you send it to your architect to have him check that it is importing properly for him into AutoCAD. If so, repeat for the other 3 elevations.
I would get these to him ASAP, while your working on outputting the floor plans, so that he can get started with them… and start relieving some of the pressure you’re feeling.