"a window in the house next" or "a window at the adjacent house"
Here is a sentence from an English lesson.
When you walked down the path you passed a window in the house next door and you tried to look ahead of you to avoid looking through the window and seeing what was going on.
In my opinion the second variant of the expression in question is more proper one.
a window in the house next door = a window at the adjacent house
As you see, here is a confirmation of my words.
Crossing happens when the close up of the window at Bernie's house pans away to…
Would you be kind enough to tell me your opinion concerning the matter in question?
Thank you for your efforts.