Repair or replace your concrete patio
If your patio has a few thin cracks but still sits flat and drains away from the house, a repair may be all it needs. When it's sunk, tilted toward the foundation or broken into pieces, the trouble is usually the ground under it, and patching the top won't change that. In that case I'll tell you to tear it out and start over, because a new surface on a bad base just fails again.
What shapes the price of a concrete patio
Size is the biggest piece, then whether we're hauling out an old slab, how far the truck can get to the spot and how much digging and packing the ground needs. A roof over it adds planning too. When the budget's tight, the base is the first thing people want to trim, since nobody sees it on day one. I'd rather you make the patio a little smaller, because the base is the part you can't fix later without starting over.