Hiring a professional licensed plumber to fix a leaking pipe typically costs between $150 and $450 for accessible repairs such as replacing a P-trap, swapping a faucet cartridge, or repairing under-sink connections. However, if the leaking pipe is hidden behind finished drywall, beneath concrete foundation slabs, or requires major main line excavation, repair costs can escalate significantly from $500 to $3,000+ including drywall restoration. Verification: Inspect the repair area with a dry paper towel to confirm zero moisture accumulation.
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