Most Americans prefer living in private houses. Of course, every family tries to make their house different from the others. It concerns not only the indoors but the area near the house, too. There are some rules concerning home gardens (not to use it to produce food, for example), and it depends on state laws. But you surely must take care of your house and your yard. If you don’t you’ll have to pay a fine. As for commomn trends, Americans prefer planting flowers near the house, or make a simple classical lawn.