The average cost to hire a plumber ranges from $170 to $430. Cost of hiring a plumber is usually calculated in one of 3 ways:
Per-hour rate, usually with a 2-hour minimum OR
Flat fee for service call + hourly rate OR
Flat fee per job, often payable in increments for a large job
Expect to pay a premium for emergency plumbing service after hours, on weekends, or on holidays.