When you're inside your house, there is - at a programming level - no outside there to be seen through the windows. You haven't gone through the door to the inside of the structure in the housing ward, you've been teleported to a disconnected room that is only theoretically the same place.

That said, they could do a little more with their windows than just daytime/nighttime. Reflecting the actual weather in the housing ward would go a long way - it's rather jarring to move from a rainstorm in the Lavender Beds into my house where the sunlight is streaming through the windows... just a different "overcast daytime" light setting would help.