Repairing or replacing a concrete patio
If your patio has a few hairline cracks and still sits flat, it usually just needs the cracks cleaned out and filled. Once it has sunk, tipped toward the house or broken into pieces that rock when you step on them, I'd replace it. The trouble is in the base, and patching the top doesn't reach it. We'll look at it together, and I'll tell you which one I think it is.
What shapes the price of a concrete patio
Size and thickness set how much concrete we order. The bigger swings usually come from what's under and around the patio, like tearing out an old slab, hauling dirt, bringing in base rock or working where the truck can't back up close. The finish matters too. If something has to give, I'd keep the base and go plain on top, because the base is the one part you can't fix later without tearing it all out.