Why this is the one you cannot fix later
Everything else on this site can be broken out and re-poured for the price of the work. A foundation cannot — the house is sitting on it. A footing placed above the frost line will heave when the ground beneath it freezes and expands, and heave does not distribute itself politely: one corner lifts, and you read the result upstairs as doors that stop latching, drywall cracking over openings, and a floor that is out of level. Under-specified rebar and a foundation that fails inspection cost you differently but immediately, because the build stops and every trade behind you waits.



