Let me preface by saying I did do a search on this forum looking for information regarding basement additions. The search result was quite small.
I am contemplating an addition to my house. House currently sits on full basement. I'd like addition to have basement as well. I am concerned about water leakage where the old basement and the new basement would meet. What does one do to prevent water leakage in this area?
My builder is not keen on the idea of this additional basement and does not know of anyone who has done such a thing. Your thoughts?