Q. If there is a building right in front of mine across the street, and at the same level another Jewish family has their windows, do I have to light by the window if I’m higher than twenty amos from the street? If the window is higher that a meter from the ground should I still light by the window?

A. Shevet Halevy (4: 65) maintains the he should light by the window, as long as the building across is close enough to be noticeable. Ner Ish Uveiso (5: 11) quoting Horav Eliahiv zt”l and Teshuvos Vehanhogos (2: 343) opine that our Sages instituted pirsumei nissa or advertising the Chanuka miracle for the walking people on the street and not for the ones already inside their homes.
Horav Shlomo Miller’s opinion is to light by the window, even if the window is higher than ten tefachim.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a