The front porch swing at the house. When there is a picture of the front of the house, the swing is parallel with the front of the house. When there is a scene on the front porch/front door area, the porch swing is perpendicular to the house.
Throughout the series Jim & Cheryl's address is referred to as 412 Maple Street, but in external shots of the family's home the number 2652 can clearly be seen on both the house & the curb.
The series is set in Chicago, and in the one episode, Jim buys the cemetery plot next to Bronko Nagurski's grave. Bronko Nagurski is buried in International Falls, Minnesota.