While the average cost of an outdoor plumbing repair ranges from $65 - $215, that generally covers something small—like water leaking from your outdoor faucet.
Homeowners generally pay more for bigger problems like a burst pipe or leak in your sewer line. Issues with your water line (the pipes that run water between your house and the public water main) or pipe replacements will cost more than fixing an easy to access clog. Pipe repair or replacements that require your plumber to dig a trench to access the problem area increases the cost.
For example, the cost to replace a water line that runs from the water meter to the house can cost anywhere from $3,000 to $6,000. A sewer line replacement or repair from the house to the street can run $4,000 to $14,000. If you think you're experiencing problems with your sewer line, it's a good idea to hire a sewer line specialist to help.