The rules on windows seem much more relaxed these days. My daughter had a modern studio flat for a while, so lounge dining area and kitchen were one room must have been about 8m front to back with just one window at the front.. Being on the ground floor the kitchen area was always shaded and you virtually had to keep the lights on all the time when working in it.

Our bungalow is the opposite being a 70's build it has massive "picture" windows sold to the punters as a feature when in reality it was all about saving on extra brickworks. Our first house had a 12' X 6' lounge window virtually taking up one whole wall, we felt like goldfish when we sat in the room.

Richard