User blog comment:FLOTUS/Sim stuck on owned community lot on sims 2/@comment-945049-20140105134940

I've had this problem with some lots too, what helped me once was removing custom content from the lot, exiting, renaming the downloads folder to something else, re-entering the game, and it should work. After that enable your content again.

Although, if you have custom content on your sims or in your real house, it's not going to work.