Who says you can't raise children in multiunit buildings in the city?
From the Metropolitan Diary column in the New York Times:
I am friends with a family whose young children like to play in the small kitchen of their Manhattan apartment. The parents were able to accommodate them by relocating the contents of one lower kitchen cabinet and removing the shelf.
The mother reported to me that both girls had recently managed to squeeze inside the cabinet. From behind the partly closed door, the elder daughter announced that they were pretending to be cockroaches.