52-331 - Buildings designed for residential use LAST AMENDED 6/6/2024 In all #Residence Districts#, a #non-conforming# #use# that is: (a) listed in Use Groups IV, VI, VII, VIII, IX or X and not permitted as-of-right within C7 Districts; and (b) which is located in a #building designed for residential use#, may be changed only to a #use# permitted in #Residence Districts#.