My wife and I have been thinking of extending our home. we have a Rambler home with vaulted celings, and we're thinking of extending on the back side of the house from one side to the other anywhere from 7- 12 feet more, this would extend our kitchen and master bedroom, and would also add one more room to our house. however on the back of our house we have 2 window wells and this extension would cover those two window wells up. I know that we will have to have a means of egress for our basement living room. down stairs where these two windows are there is also one more window that is on the side of the house in this same family room. Has any one had any experience with this, or know of anything that would restrict us from doing this home extension?