"I can only suppose this is a bomb shelter being built on Sanford between 162nd and 163rd. After all there's only one window in front, or is that going to be a door? The south side of the building, which faces adjacent krapp, has multiple windows. Contrast to the early 20th century styling at right. How 8 decades ago.
This building replaced a regular 2 family that was used as a Buddhist temple and also had its windows blocked off." - K.W.