 You'll have to hire a company to dig out the perimeter in that location, cut a big hole with a strapped-on concrete saw, and then install a complying window and well over the new opening. It'll cost somewhere about $3,500 or so. It also involves a structural engineer who will design a new reinforcing scheme for the cut foundation. It sounds daunting, and it is, but it does add value to the house, and a future buyer will probably pay more compared to your neighbors because you now have a legal bedroom.