Fixing a leaking faucet typically costs between $125 and $250 when hiring a professional licensed plumber, which covers standard service call fees, labor time, and minor replacement parts like O-rings or cartridges. If the leak stems from badly corroded supply lines or a damaged sink deck requiring a brand-new faucet fixture installation, total costs can rise to $250 to $450 or more. Verification: Test the repaired faucet with both hot and cold handles open and closed to ensure zero water leakage.
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