Both shows were created by Sherwood Schwartz.
I’m not this geeky but I read on another forum that the girls’ bedroom wraps around the house, at least 1/2 way, possibly 3/4, or even around the whole house.
In various episodes, the girls looked out their bedroom window at the front yard, the back yard, and at least one, possibly both, side yards.
ROTFLMAO. Now that hilarious.