How can we "fix" the fact that we have no basement under the front 1/4 of our living room?? Our mason block, cape cod home with a brick facade is about 70 years old and has beautiful landscaping in front that we don't want to ruin. The basement is finished as a rec room. We are the 4th owners and think the previous owners did not make the basement bigger because there was a septic tank in the front yard, which just a few years ago was broken up & filled when we hooked up to the city sewer & water. Is there anything we can do to insulate this area or expand the basement? Thanks!