You probably like to know about house shapes in Iran specially in Mashhad. As you see in the photo, most of people live in apartments. the maximum floors for apartments in Mashhad is usually 5 floors. This unit is depends on the street and city and may be different in other places of Iran.
The families that live in apartments often have good relation with each other. They sometimes plan gathering party in the yard or under a bower. The culture of living friendly is really improved in Iran.