There are a few reasons people might choose to park in their yard instead of on the street or in a driveway. Maybe they live in a tight-knit community where everyone looks out for each other's cars and it's just easier and more convenient to park in the yard. Or, maybe they're trying to save money on parking fees or tickets. Whatever the reason, parking in your yard is perfectly legal as long as you don't block the sidewalk or impede traffic flow in any way.