As with all houses in Tranquility Lane, it stands two stories tall, with the front door entering into the living room. The room has furniture items including a Radiation King television. On the ground level, there is also a kitchen with a rolling pin, and a door to the Rockwell residence basement.
Upstairs, the house has another bathroom, and a bedroom with two single beds, where a diary can be found nearby on a nightstand. The Rockwell house is the only one on Tranquility Lane with a basement, which stores music stands, boxes, and is where Roger's desk is situated.
- Janet Rockwell's diary - Found on an end table in Janet's bedroom.
- The Rockwell residence contains a number of special items with which the Lone Wanderer may interact to complete Betty's tasks, namely the rolling pin, Janet Rockwell's diary, and Roger's desk.
- At the rear of the section, there is a large rock by a tree. It is possible to get outside the map by jumping over the rear fence after climbing onto this rock.
The Rockwell residence appears only in Fallout 3.