In article ,
Jeff Thies wrote:

IMHO, leveling the kitchen is most important. I leveled mine (29 house)
with some jacking but also with some shims and underlayment. It took a
while but I didn't crack the walls.

Jeff

I'm curious about this, because I have a rental house that's sagging a
bit in one corner. I've heard that jacking it slowly is the way to go.
What does slowly mean? 1/4" per month? I can see the wood adjusting
itself over time, but what happens to pipes?