I'm currently restoring a 200 year old house in New England. A contractor's tearing down the kitchen addition to build a new one. Let me give you some background to my question:
The kitchen's teetering over a crawl space and the main house has a full dirt basement only about 5 ft. high due to settling. Knowing I want a useable basement, my contractor wants to dig down about a foot and a half, pour a concrete floor with sump pump, and regrout the
stone walls painting it with gook for moisture control.
A house mover made me an offer I had to refuse, so raising the house, removing the old foundation, etc. is out of the question. While I lack experience, my instincts tell me not to dig down - I worry about water
and unsettling the foundation.
My question: does it seem wiser to you to put a new basement under the new kitchen addition (instead of the concrete slab ala my contractor's idea) and just pour a concrete floor in the old one with a french drain and let it be?