If a person has an existing window and his neighbor builds a new courtyard next to it, what must the neighbor do?
The neighbor building a new wall must leave at least 4 cubits of clearance in front of the existing window — not blocking the light or air.
Question 2
If a window is positioned low in the wall, can the owner demand that the neighbor's wall be built at a certain height?
A low window has special protections — the window owner can compel the neighbor to build the wall high enough that it does not block the low window's light.
Question 3
If a courtyard owner waives his right to privacy regarding a neighbor's window, can a future buyer of the courtyard reassert that right?
Once the courtyard owner waives the privacy right, it is gone permanently — future owners of the courtyard are also bound by the waiver.
Question 4
What happens if a window owner moves his window to a new location?
Changing the location of a window extinguishes the prior rights — the new position is treated as a completely new window, and the neighbor may object accordingly.
Question 5
Two brothers divide a shared courtyard. Does either retain the right to privacy from the other's windows?
When two brothers divide a courtyard without conditions, they implicitly waive the privacy claim against each other's existing windows — since they were already accustomed to that exposure.