The home, and particularly the parental home, in dreams can stand for shelter, warmth and nourishment.
To dream of being at home signifies a return to the standards we learned as a child, both positive and negative.
Rooms and building usually represent our inner selves, and your home represents this at the deepest level. It is the place where you subconscious was developed and grew, where your mind and thought were modeled. It is for this reason the dreaming about your childhood home, or your most significant home, is extremely common and happens quite frequently for most people.
You may also dream about your home if you feel you have unresolved issues with your parents or family, as most people do, so that you can replay events in your home and try to resolve them.
The home can also represent sanctuary, that is a place where we can be ourselves without fear of reprisal.