Some garage floors are connected to the foundation, and some aren’t. So, answering this question will help you determine the best repair solution.
If the garage floor isn’t connected to the perimeter of the foundation, then we can use a repair procedure called polyjacking to lift the sinking garage floor.
If the garage floor is connected to the perimeter of the foundation, it’s possible the entire garage is sinking, not just the floor. If so, that will need a completely different repair solution.