Abstract: The present invention includes a unique mid-level room arrangement for a building structure such as a residential home. The building structure is comprised of at least one room on a first below ground level floor and at least one room on a second below ground level floor. The second below ground level floor is above the first below ground level floor, and a stairway connects the first below ground level floor to the second below ground level floor. The building is also comprised of at least one room on a generally ground level floor. The second below ground level floor is connected to the ground level floor by a stairway. There is also at least one room on an upper level floor above the ground level floor. A stairway connects the ground level floor with the upper level floor, and it has a landing at a location between the ground level floor and the upper level floor. At least one room is on a mid-level floor between the ground level floor and the upper level floor.