Common places of semi-detached houses:

 
      groundflour: 
 (m2)
          hall
  20,00
  20,00

       store:
 (m2)
          landing
 3,05
          gangway
  3,55
  6,60

       common garage of 4 buildings:
 (m2)
          ramp
 90,1
          garage-1
 424,19
          garage-2
 424,19
          stairway
 21,15
          storage-1
 16,40
          storage-2
 16,40
  992,43