What is the best way to repair a concrete porch when half has sunk 3 inches with a crack dividing the two areas The home is 7 years old and the porch is 20 by 10 feet?

Have same exact problem and didn't solve it yet - but, hopefully, on my way:) There's a technique called "concrete raising" - google it up. They drill small holes in concrete and pump some filler in (sand, clay, whatever)I I din't yet find local contractors - but 2 companies had online request forms, which I filled out. No response yet (3 days). I'm hopeful - but keep looking. That's how I stumbled upon your question.

Will post again if find out anything interesting

good luck

--dmitri

The technique is also called mudjacking, slabjacking and pressure grouting - use these when looking up a contractor on google maps or local.com

More reading on this: http://www.handymanclub.com/Projects/Project.aspx?id=18319

--dmitri

Apparently there was no rebar or wire put in to hold the concrete together. Drill holes in the high part for rebars going to the outside supports and repore conrete. But, what will keep it from sinking again?