62-321 - Floor area regulations for R1 through R5 Districts LAST AMENDED 12/5/2024 R1 R2 R3 R4 R5 In the districts indicated, the maximum #floor area ratio# for #residential buildings# or #residential# portions of #buildings# shall be as set forth for the applicable district regulations provided in Section 23-21 (Floor Area Regulations for R1 through R5 Districts), inclusive.