that house with that car

in our neighbourhood, somebody has a same silver great saab just like ours parked at the front. every time we drive by, sienna jumps "same like mine." well, if to notice an identical car is not so difficult, how about to identify the house when the car is not there? she would tell you "car missing" right away when we pass the house! i still don't know which house has the car if the car is not parked at the front.