Turning A Crawlspace into a basement
OUCH!!! This is an expensive job. You're looking at the possibility of having footings and foundations installed, plus some heavy digging under an existing structure. This costs big bucks and will take a good bit of time. If you go this route, be SURE you have references for the type of job you're having done. I mean it. Be sure the Contractor is Bonded and Insured. Otherwise, you'll have a heck-of-a-time explaining to your Insurance Company why they should pay to put the 1st floor back where it belongs!
My best to ya and hope this helps.
Jay J -Moderator
PS: I can't answer your question directly but the type of Contrator you want are ones that deal with excavation and foundation construction/repair ...