un til when were outhouses in common use in manhattan?

Question

people had to go in the back yard untill when?

Answer 1

dont forget that there were many improvements over after the20 century. in the late 1800 outhouses were common except were there was runing water. not all areas had the pipes to supply running water except larger cities, in the more exclusive and rich areas.

Answer 2

Until about the turn of the century in the urban areas. Other places they were still common until after WW2.