I had to do the following:
1) Convert "community lot" back to "residential lot"
2) Move a sim into the house.
3) Click on the door I wanted to be the front door and "set it as front door" - I was not able to do this while it was a community lot.
4) Move sim out of the house
5) Convert the house back to "community lot" - don't forget to put back tills and items that can only be used in community lots!!!
6) Click on the "front" ground of the "communit lot" and "set as front lot"