To provide collective housing which is high in space efficiency inside and outside a pipe space, and excellently copes with pipe repairing/replacing work.

In the collective housing where the pipe space 235 is arranged on one side of a common corridor opposite to dwelling units, feed water pipes 262, sprinkler pipes 272, service wires, and gas pipes which extend to the plurality of dwelling units, respectively, are branched from a feed water riser 261, a sprinkler riser 271, and electricity riser 281 which penetrate through a plurality of stories, respectively. Then feed water meters 254, alarm valves 255, electricity meters 253 provided for the pipes and the wires are put together by trade sections, and arranged in the pipe space 235. Further a dwelling unit draining down pipe 301 is set in the pipe space 235.