Archije

Not sure if this is appropriate question for this forum, this is my first time here. How expensive can it get to fix a floor that has sloped, i.e. seems to be sinking, on a main floor that is above a basement that is only a crawl space? The walls of the main floor are also only about 7ft in height. The home is a 2-storey and seems well-maintained other than these issues. Thanks.