It's not an apartment or hotel. It's BELVEDERE CONDOMINIUM ASSOCIATION.
Still in good condition and still occupied to this day.
Security is tight.http://www.belvedereslc.com/home.html
and the building to the north used to house city library then a planetarium and it is being restored to first glory, to be occupied by the O. C. Tanner Company.
You can contact the management direct through above link.