Hoping I can get some valuable advise on a future project.
I have a 50 year old ranch style home with full basement. The
basement only has a ceiling height of aobut 7'7"
We have construction plans to add about 900 sq. ft of basement.
The new basement will be 13 coarse block wall which means the footers
need to be below the level of the footers of the existing structure
I have had 2 contractors bid on the job.
One has said to just dig footer adjacent to existing footers and
foundation while the other has said to underpinn the existing
structure with the new footers and foundation.
What direction do I go and why? Which is more costly?