The House of the Brothers Strong is where Strong Bad, Strong Mad, and Strong Sad all live together. The Cheat spends a lot of time here, and his computer is in the house, even though he sleeps and "lives" in The King of Town's Grill. Gavin and The Cheat seem to be the closest things to pets the brothers have in the house. The exterior of the building has only been seen in Strong Bad's Cool Game for Attractive People (although in cheat talk it was shown that there is an old sycamore outside that makes the sound "Douglas" when it rubs against the window) because most of the events happen somewhere inside.
To the left of the Computer Room exiting through a door, Strong Sad's room can be seen; going left and downstairs, the kitchen; going straight through into a hallway and turning left will lead past Strong Bad's room, and going down another set of stairs will lead through the laundry room and into the basement. Oddly, the bathroom is directly beyond Strong Sad's room, and Strong Mad's room is on the other side of that.