I am interested in digging the basement of my 90 year old home to get more headroom in the basement, and then finishing the basement and duplexing it to the first floor.
Does anyone have any recommendations or pitfalls to avoid when digging a basement deeper? I am planning to go 16" deeper all over. The ground the house is build on is relatively level and is some mix of sand & clay.
Does anyone have experience they'd care to share doing this in an older home? Any advice or warnings are appreciated!