Basement Next to Slab
My house is 10 yrs old and built on a slab with block walls. I want to build an addition but with a basement instead of a slab or crawl space.
The problem is that everyone has a different opinion on how to place a basement beside a slab. The structural engineer has come up with some complicated plan that is very expensive and the architect agrees that it is overkill.
I thought the general rule was for every foot you dig under the original foundation you need to come away from the foundation one foot. For instance, I have to dig about 4 feet deeper than the original foundation so my basement would effectively be about 4 feet more narrow than the first floor. The soil is very hard and sturdy according to the soil engineer.
Does this seen right?