The best price for foundation repair starts at $1,000 (rough estimate). At Lamunyon, McPherson, KS, we provide a complimentary inspection and estimate to ensure transparency throughout the process. But here are the exact pricings for foundation repair– Foundation Crack Repair: Between $250 and $800. Sinking Foundation Repair: Between $500 to $3000. Leak Repairs: Between $2000 to $7000. Remember, foundation repair cost always depends on severity.