The girls’ bedroom goes at least 3/4 around the house - possibly all around the house. In various episodes, the girls look out their bedroom window, and see the front yard, the back yard, and at least one side yard.
I think the boys’ bedroom has no windows at all.
Mike Brady was quite an architect.
If you saw “The Brady Bunch” movies they did, ALL of Mike’s architectural renderings (regardless of what they were for) looked exactly like the house.