We bought an 80 year old home. It is very small and the cellar is more or less a dirt filled area under the house. Previous owners added a bathroom to the house. (The house did not have a bathroom for many years.) When they added the bathroom, they covered the original opening to the space under the house. So they knocked a hole in a different area, createing an opening for dirt to fill the space every time it rains. To create a larger home we would like to dig out the basement and find out how deep the foundation is. Then begin making a living space out of it. HELP...we need ideas.